View allAll Photos Tagged gemology
Diamonds are thought to have been first recognized and mined in India (Golconda being one of them), where significant alluvial deposits of the stone could then be found along the rivers Penner, Krishna and Godavari. Diamonds have been known in India for at least 3000 years but most likely 6000 years. In 1813, Humphry Davy used a lens to concentrate the rays of the sun on a diamond in an atmosphere of oxygen, and showed that the only product of the combustion was carbon dioxide, proving that diamond is composed of carbon. Later, he showed that in an atmosphere devoid of oxygen, diamond is converted to graphite. The most familiar usage of diamonds today is as gemstones used for adornment a usage which dates back into antiquity. The dispersion of white light into spectral colors, is the primary gemological characteristic of gem diamonds. In the twentieth century, experts in the field of gemology have developed methods of grading diamonds and other gemstones based on the characteristics most important to their value as a gem. Four characteristics, known informally as the four Cs, are now commonly used as the basic descriptors of diamonds: these are carat, cut, color, and clarity.
The imperfect perfect contraption! Mechanical, electrical and a lot of physics, chemistry, and geology/gemology define this contraption.
A turntable, vinyl record, diamond needle, dust, static, speed, tracking weight, and centrifugal force present technological concerns, but it all ends in such a wonderful, dynamic, and melodic sound.
Vinyl records are making a resurgence!
i knew him since he was a kitten.. he used to hang out in my friend's restaurant.. hiding under the dining table.. i left bangkok one day when i finished my gemology course in GIA.. i revisited bangkok one year later and found out that he died in a gang fight.. he somehow still a hero in my heart.. his name is 'KongKoy'.. means vampire in Thai.
Occasionally a few Ammonites have sufficient actual shell nacre remaining that after 100s of millions of years later, they can have amazing iridescence showing several colors of great intensity. The non-scientific 'gemology' term for these rare and extremely sought after bits of shell is known as Amolite. Large specimens are sadly sometimes broken up and polished to be sold as jewelry. This medium sized ammonite shows primarily red and green, while some can also show blue, purple and even yellow. As in the Morpho Butterfly, the colors are produced by crystalline formations in the shell, and change with the angle of view, and can be very bright, and are not from pigments. Ammonites are cousins of the Chambered Nautilus, both being related to squid and octopus, and are NOT sea snails. While the walls between chambers in the Nautilus are smoothly rounded, the Ammonite chambers can be very complex producing wonderful patterns. Colors not enhanced.
3 natural heart shaped Topaz Chakra crystals, and a stock stem, in the shape of a 3 leaf clover, I always thought that all Topaz were blue, but apparrently they range in colour from clear, through pale colours to rich deep colours such as reds, blues and greens.
www.gemporia.com/en-gb/gemology-hub/article/1138/what-is-...
This submission makes my 123rd and final submission to the group.
123 Pictures in 2023, theme # 104 Topaz
This is Opal from New South Wales, Australia 18x13x9cm at the Tucson Gem & Mineral Show.
www.mindat.org/loc-146632.html
The Coocoran opal fields consist of about 50 named opal fields are located about 21 kilometres east of the town of Lightning Ridge. A "field" is an area where opal mineralisation has been found. Locally, an opal field is known as a "rush" and is often named after the opal miner that initially found mineralisation in that area.
On the Coocoran opal fields, a rush can range in area from about 1 hectare up to more than 20 hectares. Peak production occurred in the period from late 1980s to late 1990s.
Underground and open cut mining techniques are used to extract opal from depths ranging from near surface up to 25 metres underground. The host rock is the Cretaceous Griman Creek Formation, which is predominantly composed of freshwater (rarely estuarine?) claystones and sandstones.
fineart.ha.com/itm/minerals/cabinet-specimens/opal-new-so...
Opal, New South Wales, Australia, 18 x 13 x 9 cm (7.09 x 5.12 x 3.54 in), From the collection of Daniel "Dan" R. Kennedy.
This impressive specimen features a vast coating of strongly colored Opal-easily one of the most readily recognizable gemstones in the world-stretching across the front and back sides of a rocky matrix. Most of the Opal has wonderful blue and green opalescence, detailed with curving bands and speckled undertones of the darker host rock. Smaller veins of Opal (relative to the size of the specimen) weave across the matrix in small, brightly contrasting veins. The color play is fabulous, erring on the side of cooler colors such as green, blue, and even flashes of purple. This piece has a flat, trimmed underside but comes with a custom acrylic base for a more desirable presentation.
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3% to 21% by weight, but is usually between 6% and 10%. Due to the amorphous (chemical) physical structure, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt.
The name opal is believed to be derived from the Sanskrit word upala (उपल), which means 'jewel', and later the Greek derivative opállios (ὀπάλλιος).[5]
There are two broad classes of opal: precious and common. Precious opal displays play-of-color (iridescence); common opal does not.[6] Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light."[7] The internal structure of precious opal causes it to diffract light, resulting in play-of-color. Depending on the conditions in which it formed, opal may be transparent, translucent, or opaque, and the background color may be white, black, or nearly any color of the visual spectrum. Black opal is considered the rarest, while white, gray, and green opals are the most common.
Precious opal shows a variable interplay of internal colors, and though it is a mineraloid, it has an internal structure. At microscopic scales, precious opal is composed of silica spheres some 150–300 nm (5.9×10−6–1.18×10−5 in) in diameter in a hexagonal or cubic close-packed lattice. It was shown by J. V. Sanders in the mid-1960s[8][9] that these ordered silica spheres produce the internal colors by causing the interference and diffraction of light passing through the microstructure of the opal.[10] The regularity of the sizes and the packing of these spheres is a prime determinant of the quality of precious opal. Where the distance between the regularly packed planes of spheres is around half the wavelength of a component of visible light, the light of that wavelength may be subject to diffraction from the grating created by the stacked planes. The colors that are observed are determined by the spacing between the planes and the orientation of planes with respect to the incident light. The process can be described by Bragg's law of diffraction.
Visible light cannot pass through large thicknesses of the opal. This is the basis of the optical band gap in a photonic crystal.[11] In addition, microfractures may be filled with secondary silica and form thin lamellae inside the opal during its formation. The term opalescence is commonly used to describe this unique and beautiful phenomenon, which in gemology is termed play of color. In gemology, opalescence is applied to the hazy-milky-turbid sheen of common or potch opal which does not show a play of color.[clarification needed] Opalescence is a form of adularescence.
www.visittucson.org/tucson-gem-mineral-fossil-showcase/
"Every year the world-renowned Tucson Gem, Mineral & Fossil Showcase is like a time portal, a trip around the world, and a treasure hunt all rolled into one. Every winter, more than 65,000 guests from around the globe descend upon Tucson, AZ, to buy, sell, trade, and bear witness to rare and enchanting gems, minerals, and fossils at more than 50 gem show locations across the city. If you're planning a winter visit to Tucson, you won't want to miss this three-week-long event filled with shows, related events, a free day at the gem & mineral museum, and much, much more!
"Whether you’re looking for a $5 shimmering crystal necklace or a show-stopping $200,000 crystallized rock from an exotic location, the Tucson Gem, Mineral, & Fossil Shows have something for everyone."
www.visittucson.org/blog/post/gems-and-minerals/
The theme this year was Shades of Green- Experience the Magic. The theme for next year's show will be Red, White, and Blue Celebrate the Spirit of Minerals
xpopress.com/news/article/783/shades-of-green-70th-annual...
TGMS 2025
Tucson Gem Show 2025
The stone is real rose quartz but it has been treated to give it the beautiful Aura colors on the surface.
The crystal this treatment is usually used on is clear quartz but sometimes also rose quartz and amethyst.
Crystals of topaz on a quartz matrix from Viitaniemi pegmatite quarry, Finland
My commercial portfolios
{i'm certain every dang awesome leaf shot in my favorites archive is in this TILT!}
1. Bokeh Wednesday: Light inside us all, 2. Sparkle (Explored), 3. Untitled, 4. Frosty, 5. Me convertí en otoño, 6. listen! the wind is rising, and the air is wild with leaves, we have had our summer evenings, now for october eves!,
7. Untitled, 8. Untitled, 9. curled, 10. Untitled, 11. Signs of fall, 12. fading,
13. Reflect, 14. autumn, 15. Untitled, 16. "No words... I know of to express", 17. flickr.com/photos/47072249@N08/5075587006/, 18. Into The Light,
19. radiance, 20. Untitled, 21. [160/365] Brisk Evening, 22. Hush now, watch the stars fall, 23. October 3, 2010 | 276/365 - golden, 24. [160/365] Brisk Evening,
25. This Little Leaf Of Mine, 26. [181/365] Autumn Walk, 27. hff -October Moon, 28. 270/365, 29. fence friday: autumn leaf edition [explored], 30. Picture Fall,
31. .gemology., 32. change, 33. Untitled, 34. “Autumn, the year's last, loveliest smile.”, 35. Good Morning Autumn!, 36. fall flare
Created with fd's Flickr Toys
“My story? Well, I don’t think I’m that interesting. I grew up in India and lived there for 13 years. My mom is white and my dad is Indian. They met at a bar and it was love at first sight– for my dad. My mom didn’t feel the same way, but my dad was persistent. They got married within a year and had their wedding in India and that’s where I was raised.
I miss it there.”
Tara, you ARE interesting and special. I hope you pursue your dreams of gemology and jewelcraft. I had a great time talking with you and learning a bit of who you are– keep at it! This is stranger #156 in my on-going stranger project.
www.facebook.com/edjuphotography
Check out more of other's stranger photos at www.flickr.com/groups/100strangers
2/31 276/366 October 2 2020
The Salvage Team discovered the wreckage after about a two-hour walk up the winding hillside. “You were wrong on your calculations there, Doc!” Marva chided. “I thought you said it would take only an hour to go these three miles.”
“That’s if we didn’t have to beat through the underbrush, encounter a few snakes…” (he paused, and said under his breath, “Why did it have to be snakes?!”) “and then ascend this slimy path made wet in the rain. If it had been dry, level ground, we could have made it in less than an hour.” Doc tried to defend his answer, as he always does, and everyone who knew him expected him to say something like this. He snapped a few photos to document the finding of the plane.
“That’s okay, guys. We finally found the plane. But you, a zoologist, afraid of snakes!” Cliff humored Doc a bit as he knew that snakes were not on his ‘favorite’ list of animals. “Marva, please call it in to Rachel that we’ve found the plane and we’ll start surveying things to see how safe this thing is to check it out.” Cliff was relieved that the plane was still somewhat intact, and this was a promising sign that the gems were safe.
Marva radioed Rachel and told her they found the plane and gave their coordinates based on the geo-tracking device that Stacy had. “That will give us the pin-point location to have the helicopter come once we’ve found the gems.”
“That may be a day or two, depending what we run into here. That plane may look intact, but it’s resting in a precarious position. The only way we can get up there would be to ascend that short mound over to the left of it.” Heinrich pointed to what looked like some temple that had been build centuries ago but now abandoned. “I’ll go get the big truck with our other tools. Stacy, could you drive the other vehicle back just a way to allow me some room?”
“Sure, Heinrich,” Stacy replied. She was an expert driver with almost any kind of all-terrain vehicle, large or small. She grew up on a farm and was driving a tractor by age ten. She also competed in dirt bike races and also did a little drag racing with her older brother when they were in college. Her life on the farm gave her the idea to study botany, and her interest in rocks and gems also got her into gemology.
Cliff was relieved that the plane was located and that they stood a good chance of recovering the gems. But he also had another uneasy feeling about this place. Something was not right, and his intuition was telling him something. He whispered, “I’ve got a bad feeling about this.”
jade
citrine
chrysophase
carnelian
sapphire....
all the colors of the world, and they were amazing! :-)
More from my 40th birthday trip with Spidy. It was gorgeous on the central coast of california. Nothing like it!
YOU MUSt SEE It oN BLACK!!!! click the image to view it that way.
In This Album: Here are screenshots of all of the software titles released on the Nintendo eShop in North America on October 1st, 2015.
About Milk Agate.
After the shape of the bead is ready, the hole is sealed, the edges of the beads are covered with wax in the same way as the symbol. Therefore, they remain the original color. This is a common common technique for Milk Dzi beads. Striped Smoky Agate beads are additionally whitened with Caustic Soda. Milk Agate, like Leopard Skin dZi beads, never bleach the symbol additionally, leaving the original mineral and parts blackened from burnt sugar that highlight the symbol. As you can see, the burnt sugar in Smoky Agate gives off a warm brown hue, even after a long time. In Milk Agate it has a cooler gray tint.
Around the 12-15s of this century, a series of copies of Leopard Skin beads in yellow-brown, dark color was produced in China. This disappeared series quickly sold out to collectors.
Do not confuse, please, these are cast copies. The original Milk Agate has a cold tint.
Speaking strictly in scientific terms, mineralogy does not distinguish these varieties separately, gemmologists and minerologists call all DZi Milk Opalized Chalcedony. These varieties cannot be called Agate purely scientifically, since although they have the same chemical formula, they have a completely different microcrystalline structure of a nugget in nature. Let me remind you that Agate in gemology is considered to be "druze of quartz surrounded by layers of microcrystalline chalcedony.
Milk - Agate is a cross between Opal and Chalcedony. Milk Agate nuggets do not have voids and Quartz druze inside.
The peculiarity of the Milk Agate nuggets is that they do not grow underground, like other Chalcedony. They form on the surface of mountains only in the Himalayas, at an altitude of more than 5 km. For thousands of years, these nuggets have been a very valuable find of the Tibetans. Now, according to geologists, the reserves of this mineral on Earth are completely exhausted.
This mineral has many varieties.
If mineralogists have not yet singled out these minerals and varieties into separate varieties, jewelers, manufacturers of dZi beads and collectors have done it for themselves.
Distinguish Standard Milk Agate,
Opalized Agate (more blue and transparent than Milk Agate).
Snow Leopard Skin. (This bead)
Frosty Agate is also distinguished. (in this mineral, the internal structure resembles frozen patterns on glass). Unique crystal structure.
All these are very close species, the features of some species may intersect with others. Each nugget has its own individual qualities. Even beads made from the same nugget can differ from each other. This is influenced by the processing of the mineral during the production of the bead and the external conditions afterwards. This makes each Milk DZI unique and desirable.
The Tibetans call all these beads simply Milk dZi. However, these are more folk names than scientific ones.
The Canadian Museum of Nature (French: Musée canadien de la nature) is Canada's national natural history museum in Ottawa, Ontario, Canada. Its collections, which were started by the Geological Survey of Canada in 1856, have branched out to include life sciences. The Museum is affiliated with the Canadian Museums Association, the Canadian Heritage Information Network, the Alliance of Arctic Natural History Museums, the Alliance of Natural history museums of Canada and the Virtual Museum of Canada.
The building, known as the Victoria Memorial Museum Building, was built in former farm fields known as Appin Place, the estate of the Scottish-born merchant William Stewart. The neighbourhood became known as Stewarton and residential development started in the area during the 1870s. The government purchased the land in 1905 hoping to develop the site as a sort of 'end piece' to complement the stone structure of the Canadian Parliament Buildings at the opposite end of Metcalfe Street, on Parliament Hill.
This massive stone structure is an excellent example of early 20th-century architecture in Ottawa, and was built for $1,250,000 by architect David Ewart who is responsible for many similar structures around the city.[5] The construction of the building involved the importing of 300 skilled stonemasons from Scotland. The architectural style is sometimes described as Scottish baronial. Ewart was sent to Britain to study the architecture of Hampton Court and Windsor Castle, which greatly influenced his design of this building.
Unfortunately, because of the presence of unstable Leda clay in the geology of the site, a tall tower that was situated at the front of the building had to be taken down in 1915 due to settling and the concern that the foundation could not support the weight. The unstable site forced some workers to stop working, as shifting foundations in the basement shot bricks and stones out from the walls, hitting some construction workers.
The building found itself filling a more auspicious role than originally intended when in 1916, fire consumed the majority of the Centre Block on Parliament Hill. The recently completed Victoria Museum Building became the temporary home of the House of Commons from 1916 to 1919 and the affairs of the government were run from the site until the completion of the new Parliament building in 1922. The Senate used the first floor mineral room (now the Fossil Gallery) and the Commons used the amphitheatre on third floor (now the Salon). Chairs and tables for members were brought in, as well as the speaker's chair for both the Senate and Commons.
In 1986, the National Museum that occupied the building was split into the National Museum of Natural Sciences (eventually renamed the Canadian Museum of Nature) and the National Museum of Man (renamed the Canadian Museum of Civilization, and later the Canadian Museum of History), although both entities continued to share the same edifice. In 1989, the then Canadian Museum of Civilization moved to a new location in Gatineau, Quebec, and the Canadian Museum of Nature was able to occupy the entire Victoria Memorial Museum Building.
The Victoria Memorial Museum building was designated a National Historic Site of Canada in 1990.
A major renovation of all parts of the building began in 2004 and was completed in 2010, including a glass "lantern" taking the place of the tower removed in 1915. The weight of the new tower is cantilevered off the new elevator shafts; the building itself does not support the new tower. For most of the duration of the renovation, parts of the building were still open to the public, but the entire building was closed temporarily on 26 April 2010 for final changes. The newly renovated museum re-opened again on 22 May 2010, and the lantern structure was christened the "Queens' Lantern" in honour of both Elizabeth II, who visited the building on her 2010 royal tour, and Queen Victoria. (Extracted from Wikipedia)
Day 27... Window - Door - Wall 1
Spanish Village is located on the east side of Balboa Park of San Diego, California. It is a art colony consisting of pottery, glass, gemology, sculpture, painting, etc. guildes of the trade...
For all of you who are new to me, I just thought I will make a small Interview of and by my self...
Questioner: Hello Danny
Danny: Hello Journalist!
Q: what have you been up to today?
D: selling toys online!
Q: Do you like it?
D: No! not that much but it gives me an income so I can work with what I really want to work with!
Q: what is that?
D: anything I find entertaining at the moment, Mostly making art, conducting and constructing noise, walking around, listening to music and noise, feeling free, frequenting cafés, experiencing stuff and stuff like that!
Q: ooh you got a lot of hobbies!
D: ooh I don´t see that as hobbies, my hobbies are collecting and building with LEGO blocks and sorting, collecting and swapping Jokers!
Q: ooh interesting so you build a lot of LEGO?
D: No it is seldom that time goes in that pace that I manage to get a few hours to build, I guess I spend more time hunting for new Joker Cards than building constructs in LEGO, and I paint far much more...!
Q: what are you painting at the moment?
D: my longest painting ever, longest in the sense of time I have probably been painting on the same painting for over a year now... it is gonna be called "Degenerated art" a kind of political name which a cultural spoke person in the Swedish Democratic party (Sverige demokraterna) inspired me to make (or start making)...
Q well our live time is up, the interview will carry on on our next time here at the DBC!
Over and out!