View allAll Photos Tagged gemology
It's time to introduce a new series of vector assets: the crystal diagrams, volume one.
These two hundred assets (200) have been carefully drawn with the pen tool in Illustrator, sourced from old mineralogy/gemology books. They come in three versions:
- Stroked version (outline/dashed hidden lines if applicable)
- A compound shape version (outline/dashed hidden lines if applicable)
- A compound shape version (outline only)
These are perfect for many uses. Do you need a mystical piece of key art? We got you. Do you need a smaller ornament to complete a piece? We got you. Do you need to adjust the thickness of the line work to fit your current project's aesthetic? We got you. Do you need to add color to all/part of the crystal? We got you. Do you need sharp corners, bigger or smaller dashes? WE. GOT. YOU.
The line quality is clean and crisp. Each asset is available in various vector formats to fully take advantage of scalability. Applying your own library of aging/texturing/brush techniques to the assets is easy, and straight forward, thanks to their vector nature.
Have fun with them, and don't hesitate to share your work.
---
- Two hundred (200) assets
- Available in a variety of vector formats for greater flexibility (Illustrator CC, CS6, CS3, EPS, PDF)
- 185 MB archive
---
If you like the grit you see in the preview images, I'm happy to tell you that you can have it for your own projects! It comes from my vector noise textures, volume four, also available on Creative Market: crmrkt.com/dDmErV
---
You should add your name to the Shop's mailing list at mailchi.mp/de8bed089b59/theshop. On the menu: new release sneak peeks, deals information, and other general updates from the factory floor. No spam, guaranteed.
Sony A7III
🔬 Minolta Dimage Scan Elite 5400
⚡ ±1.5x || FOV 23mm
️ Stacking 21 fotos
️ ZS + PS
💎 Este rubí, procedente del Distrito Mysore, Karnataka (India), muestra una cautivadora tonalidad rosada que se aleja del clásico rojo intenso que solemos asociar con esta gema. Su color se debe a la cantidad de cromo presente en su estructura cristalina.
🔬 El rubí forma parte de la familia del corindón, un mineral conocido por su dureza (9 en la escala de Mohs), lo que lo convierte en una de las piedras preciosas más valiosas y resistentes del mundo.
💫 Además de su belleza, el rubí ha sido protagonista en joyas reales y hasta en aplicaciones tecnológicas como los láseres, gracias a sus propiedades ópticas únicas.
💎 This ruby, from the Mysore District, Karnataka (India), displays a captivating pinkish hue, quite different from the deep red commonly associated with this gem. Its color is influenced by the amount of chromium present in its crystal structure.
🔬 Ruby belongs to the corundum family, a mineral known for its remarkable hardness (9 on the Mohs scale), making it one of the most valuable and durable gemstones in the world.
💫 Beyond its beauty, ruby has played a role in royal jewelry and even in technological applications like lasers, thanks to its unique optical properties.
Yesterday, I posted a couple pictures of striae in natural sapphire. Here's a comparison shot of curved striae in synthetic sapphire. Polishing lines can appear curved if the facet size is large enough. But notice how the striae cross the facet junction; this feature is internal and diagnostic of synthetic.
It's time to introduce a new series of vector assets: the crystal diagrams, volume one.
These two hundred assets (200) have been carefully drawn with the pen tool in Illustrator, sourced from old mineralogy/gemology books. They come in three versions:
- Stroked version (outline/dashed hidden lines if applicable)
- A compound shape version (outline/dashed hidden lines if applicable)
- A compound shape version (outline only)
These are perfect for many uses. Do you need a mystical piece of key art? We got you. Do you need a smaller ornament to complete a piece? We got you. Do you need to adjust the thickness of the line work to fit your current project's aesthetic? We got you. Do you need to add color to all/part of the crystal? We got you. Do you need sharp corners, bigger or smaller dashes? WE. GOT. YOU.
The line quality is clean and crisp. Each asset is available in various vector formats to fully take advantage of scalability. Applying your own library of aging/texturing/brush techniques to the assets is easy, and straight forward, thanks to their vector nature.
Have fun with them, and don't hesitate to share your work.
---
- Two hundred (200) assets
- Available in a variety of vector formats for greater flexibility (Illustrator CC, CS6, CS3, EPS, PDF)
- 185 MB archive
---
If you like the grit you see in the preview images, I'm happy to tell you that you can have it for your own projects! It comes from my vector noise textures, volume four, also available on Creative Market: crmrkt.com/dDmErV
---
You should add your name to the Shop's mailing list at mailchi.mp/de8bed089b59/theshop. On the menu: new release sneak peeks, deals information, and other general updates from the factory floor. No spam, guaranteed.
Group of unrecoverable tanzanites, each damaged by a jeweler's steam cleaner. Unfortunately, it's a simple fact of life that tanzanite does not appreciate suddenly going from room temp to the 100C+ of pressurized steam.
Though the damage may look minor in some of these, all of them are unrecoverable as-is. To salvage anything from this group, the visible fractures will need to be removed (or the stone simply split along the fracture), and the remaining pieces treated as rough.
Even if any of these can be divided perfectly in half, the new stones will be around 1/4 of the original size -- so, at best a 50% recovery in the end, plus cutting fees. Given the price of fine tanzanite these days, that's a heavy loss. (In the 2021 market, some pieces pictured here could have retailed in the $800-$1000/ct or higher range before being damaged)
Placenticeras sp. - fragment of a fossil ammonite with ammolite from the Cretaceous of Canada. (~2.95 centimeters across at its widest)
Ammolite is biogenic gem material from Alberta, Canada. It has stunningly intense, iridescent rainbow colors. Ammolite is fossil shell material from Placenticeras ammonites. Ammonites are an extinct group of swimming squid-like organisms with planispirally coiled shells (the chambered nautilus in modern oceans is a distant relative of ammonites, but has a similar body plan). Ammonite shells were originally nacreous aragonite (“mother of pearl”) (CaCO3). Geologic studies have shown that ammolite gem material formed from slight diagenetic alteration of the original ammonite's nacreous aragonite shell. Diagenesis has significantly intensified and brightened the play of colors.
Ammolite is mined, polished, and treated by resin- or epoxy-impregnation to stabilize it. Very rarely, complete specimens of Placenticeras ammonite shells preserved in ammolite are recovered - such specimens are exceedingly valuable (for example, see figure 2 of Mychaluk et al., 2001).
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Ammonite info. from the Wyoming Geological Museum in Laramie, Wyoming:
Ammonites
Ammonites are extinct molluscs of the Class Cephalopoda, a group represented today by the octopus, squid, and shell-bearing Nautilus. Ammonites appeared midway through the Paleozoic Era (400 million years ago). They diversified many times over their 300 million year history, and persited through three mass-extinction events. During the Mesozoic Era (from 250 to 65 million years ago), ammonites reached their greatest diversity, achieving many different shell forms and ways of life. At the end of the Mesozoic Era, ammonites became extinct, together with the dinosaurs, pterosaurs, and marine reptiles.
Ammonite Anatomy
Ammonites, like the modern Nautilus, possessed an external shell divided into a series of chambers by thin walls called septa. These chambers were connected by a flesh-bearing tube known as the siphuncle. By analogy with the living Nautilus, it served to regulate fluid and gas levels in each chamber, enabling ammonites to control their buoyancy. Although ammonites are common fossils, little is known about their soft parts. However, it is thought that their soft anatomy was similar to that of modern squid and octopi. They probably possessed eight to ten arms surrounding a beak-like mouth. Locomotion probably involved bringing water into a cavity, formed by the fleshy mantle, then expelling it by muscular contraction through a funnel-like opening called the hyponome, therby implementing a form of jet-propulsion.
Ammonite Ecology
Ammonites were common constituents of Cretaceous marine ecosystems and were represented in many habitats in the shallow seas that covered North America during the Mesozoic Era. Ammonites lived in both nearhsore and offshore settings in both benthic (seafloor) and pelagic (open ocean) habitats. Some species could probably even migrate between both types of habitats.
Feeding Habits
Most ammonites, like their modern cephalopod relatives, were probably carnivores, although some may have been passive planktivores. The carnivorous ammonites possesssed powerful jaws adapted for crushing prey, which included crustaceans, fish, clams, snails, and even other ammonites.
Reproduction and Growth
Ammonites, like their modern relatives the octopi and squids, hatched as tiny larvae in huge numbers and probably grew to maturity within a short span of time. Most adults were small, while those of some species were huge, reaching sizes greater than 6 feet (2 meters) in diameter. Aberrant ammonites that changed their shape during growth are thought to have changed their habitat as well.
Ammonite Sexes
Like modern cephalopods, ammonites showed distinct differences between sexes. Shells of female ammonites, known as macroconchs, are larger and possess little or no ornamentation. Males, known as microconchs, are smaller than females and commonly possess distinct ornamentation.
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Name & classification: Placenticeras meeki or Placenticeras intercalare (Animalia, Mollusca, Cephalopoda, Ammonoidea, Ammonitina)
Stratigraphy: Bearpaw Formation, Campanian Stage, upper Upper Cretaceous, ~70-75 Ma
Locality: mine in the St. Mary River Valley west or northwest of Welling and south-southwest of Lethbridge, southern Alberta, southwestern Canada
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Reference cited:
Mychaluk, K.A., A.A. Levinson & R.L. Hall. 2001. Ammolite: iridescent fossilized ammonite from southern Alberta, Canada. Gems & Gemology 37(1): 4-25.
It's time to introduce a new series of vector assets: the crystal diagrams, volume one.
These two hundred assets (200) have been carefully drawn with the pen tool in Illustrator, sourced from old mineralogy/gemology books. They come in three versions:
- Stroked version (outline/dashed hidden lines if applicable)
- A compound shape version (outline/dashed hidden lines if applicable)
- A compound shape version (outline only)
These are perfect for many uses. Do you need a mystical piece of key art? We got you. Do you need a smaller ornament to complete a piece? We got you. Do you need to adjust the thickness of the line work to fit your current project's aesthetic? We got you. Do you need to add color to all/part of the crystal? We got you. Do you need sharp corners, bigger or smaller dashes? WE. GOT. YOU.
The line quality is clean and crisp. Each asset is available in various vector formats to fully take advantage of scalability. Applying your own library of aging/texturing/brush techniques to the assets is easy, and straight forward, thanks to their vector nature.
Have fun with them, and don't hesitate to share your work.
---
- Two hundred (200) assets
- Available in a variety of vector formats for greater flexibility (Illustrator CC, CS6, CS3, EPS, PDF)
- 185 MB archive
---
If you like the grit you see in the preview images, I'm happy to tell you that you can have it for your own projects! It comes from my vector noise textures, volume four, also available on Creative Market: crmrkt.com/dDmErV
---
You should add your name to the Shop's mailing list at mailchi.mp/de8bed089b59/theshop. On the menu: new release sneak peeks, deals information, and other general updates from the factory floor. No spam, guaranteed.
It's time to introduce a new series of vector assets: the crystal diagrams, volume one.
These two hundred assets (200) have been carefully drawn with the pen tool in Illustrator, sourced from old mineralogy/gemology books. They come in three versions:
- Stroked version (outline/dashed hidden lines if applicable)
- A compound shape version (outline/dashed hidden lines if applicable)
- A compound shape version (outline only)
These are perfect for many uses. Do you need a mystical piece of key art? We got you. Do you need a smaller ornament to complete a piece? We got you. Do you need to adjust the thickness of the line work to fit your current project's aesthetic? We got you. Do you need to add color to all/part of the crystal? We got you. Do you need sharp corners, bigger or smaller dashes? WE. GOT. YOU.
The line quality is clean and crisp. Each asset is available in various vector formats to fully take advantage of scalability. Applying your own library of aging/texturing/brush techniques to the assets is easy, and straight forward, thanks to their vector nature.
Have fun with them, and don't hesitate to share your work.
---
- Two hundred (200) assets
- Available in a variety of vector formats for greater flexibility (Illustrator CC, CS6, CS3, EPS, PDF)
- 185 MB archive
---
If you like the grit you see in the preview images, I'm happy to tell you that you can have it for your own projects! It comes from my vector noise textures, volume four, also available on Creative Market: crmrkt.com/dDmErV
---
You should add your name to the Shop's mailing list at mailchi.mp/de8bed089b59/theshop. On the menu: new release sneak peeks, deals information, and other general updates from the factory floor. No spam, guaranteed.
Trapiche Emerald
NHMLA 33173
Part of the Natural History Museum of Los Angeles, Gem and Mineral Hall Collection.
Reference Article:
www.gia.edu/gems-gemology/fall-2015-colombian-trapiche-em...
It's time to introduce a new series of vector assets: the crystal diagrams, volume one.
These two hundred assets (200) have been carefully drawn with the pen tool in Illustrator, sourced from old mineralogy/gemology books. They come in three versions:
- Stroked version (outline/dashed hidden lines if applicable)
- A compound shape version (outline/dashed hidden lines if applicable)
- A compound shape version (outline only)
These are perfect for many uses. Do you need a mystical piece of key art? We got you. Do you need a smaller ornament to complete a piece? We got you. Do you need to adjust the thickness of the line work to fit your current project's aesthetic? We got you. Do you need to add color to all/part of the crystal? We got you. Do you need sharp corners, bigger or smaller dashes? WE. GOT. YOU.
The line quality is clean and crisp. Each asset is available in various vector formats to fully take advantage of scalability. Applying your own library of aging/texturing/brush techniques to the assets is easy, and straight forward, thanks to their vector nature.
Have fun with them, and don't hesitate to share your work.
---
- Two hundred (200) assets
- Available in a variety of vector formats for greater flexibility (Illustrator CC, CS6, CS3, EPS, PDF)
- 185 MB archive
---
If you like the grit you see in the preview images, I'm happy to tell you that you can have it for your own projects! It comes from my vector noise textures, volume four, also available on Creative Market: crmrkt.com/dDmErV
---
You should add your name to the Shop's mailing list at mailchi.mp/de8bed089b59/theshop. On the menu: new release sneak peeks, deals information, and other general updates from the factory floor. No spam, guaranteed.
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.
Lavender jadeitite with weathering rind from the Jurassic of Burma. (18.2 cm across at its widest)
“Jade” refers to more than one specific type of metamorphic rock. The four categories of “jade” are:
1) jadeitite (jadeite jade)
2) nephrite/nephritite (nephrite jade)
3) chromian jade (maw sit sit)
4) serpentine jade
Jadeitite (= jadeite jade) is a rare metamorphic rock composed of jadeite pyroxene (Na(Al,Fe)(Si2O6)). Published research on Burmese jade generally indicates that the jadeitite rock masses formed by metasomatism of albitites (= plagioclase feldspar metamorphites) at the periphery of serpentinized mantle peridotite bodies. The mantle peridotite was part of a subducting slab of Mesozoic-aged oceanic lithosphere that was emplaced upward and against southeast Asian continental lithosphere by obduction.
The rock shown above is lavender jadeitite, which is a scarce color variety. Whitish and near-white jadeite occurs throughout this rock,plus hints of pale-greenish gray jadeite near the lower left edge.
Composition: the lavender color of the jadeite clinopyroxene (Na(Al,Fe)(Si2O6)) in this rock appears to be the result of ferrous iron to ferric iron (Fe+2 → Fe+3) intervalence charge transfer (Rossman, 1974).
Geologic unit: Hpakan-Tawmaw Jade Tract, Hpakan Ultramafic Body, Naga-Adaman Ophiolite
Age: Syngenetic zircons indicate that Burmese jadeitite formed at 147 Ma (late Tithonian Stage, near-latest Jurassic. The serpentinite host rocks formed (metamorphic age) at 163 Ma (Middle Jurassic). Older literature interprets Burmese jadeitite as Tertiary in age, hosted by Late Creatceous to Eocene serpentinized peridotites.
Locality: alluvial clast (placer jade) from unrecorded locality (possibly in the vicinity of Phakant), upper reaches of the Uyu River (Uru River), western Kachin State, Indo-Burma Range, northern Burma
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References on Burmese jade:
Bender, F. 1983. Geology of Burma. Berlin. Gebruder Borntraeger. 260 pp.
Hughes, R.W., O. Galibert, G. Bosshart, F. Ward, Oo T., M. Smith, Sun Tay Thye & G.E. Harlow. 2000. Burmese jade: the inscrutable gem. Gems & Gemology 36(1): 2-26.
Qiu Zhili, Wu Fuyuan, Yang Shufeng, Zhu Min, Sun Jinfeng & Yang Ping. 2008. Age and genesis of the Myanmar jadeite: constraints from U-Pb ages and Hf isotopes of zircon inclusions. Chinese Science Bulletin 54: 658-668.
Rossman, G.R. 1974. Lavender jade, the optical spectrum of Fe3+ and Fe2+ --> Fe3+ intervalence charge transfer in jadeite from Burma. American Mineralogist 59: 868-870.
Shi Guanghai, Cui Wenyuan, Cao Shumin, Jiang Neng, Jian Ping, Liu Dunyi, Miao Laicheng & Chu Bingbing. 2008. Ion microprobe zircon U-Pb age and geochemistry of the Myanmar jadeitite. Journal of the Geological Society of London 165: 221-234.
Shi Guanghai, Cui Wenyuan, Wang Changqiu & Zhang Wenhuai. 2000. The fluid inclusions in jadeitite from Pharkant area, Myanmar. Chinese Science Bulletin 45: 1896-1901.
Shi Guang-Hai, Jiang Neng, Liu Yan, Wang Xia, Zhang Zhi-Yu & Xu Yong-Jing. 2009. Zircon Hf isotope signature of the depleted mantle in the Myanmar jadeitite: implications for Mesozoic intra-oceanic subduction between the Eastern Indian Plate and the Burmese Platelet. Lithos 112: 342-350.
Shi Guanghai, Jiang Neng, Wang Yuwang, Zhao Xin, Wang Xia, Li Guowu, E. Ng & Cui Wenyuan. 2010. Ba minerals in clinopyroxene rocks from the Myanmar jadeitite area: implications for Ba recycling in subduction zones. European Journal of Mineralogy 22: 199-214.
Shi Guanghai, Wang Xia, Chu Bingbing & Cui Wenyuan. 2009. Jadeite jade from Myanmar: its texture and gemmological implications. The Journal of Gemmology 31: 185-195.