View allAll Photos Tagged Quartz
Locality: Mamuju area, Sulawesi Barat Province, Sulawesi, Indonesia
Size: Specimen is 5" tall
SC2-2694
This amethyst scepter is unusual in that the color change between the colorless quartz of the shaft of the scepter and the amethyst of the "head" is very abrupt. I wish the shaft was longer, but at least the head is not significantly damaged. From Fianarantzoa, Madagascar
Quartz var. Amethyst..Creede District. Mineral Co., Colo. (Collection of the Colorado School of Mines Geology Museum, Golden, Colo.).
Quartz Geode, weather out of the lower Warsaw Formation, a dolomitic mudstone of Mississippian age. Keokuk, Lee Co., Iowa.
Quartz crystal pendant necklace featuring a quartz crystal point, amethyst, aquamarine and blue topaz. Herringbone stitch at the sides and finished with a vintage button closure.
Available in my etsy shop
Quartz with Petroleum inclusion under UV light + LED backlight.
Extension tubes KENKO 56mm + Nikkor 18-55 VR
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Quarzo con gocce di petrolio inglobate al suo interno illuminato da una luce UV e retroilluminato conun LED
Tubi d'estensione KENKO 56mm + Nikkor 18-55 VR
An alternate birthstone for January is rose quartz. However, it doesn't appear to be widely accepted as one but have had found a few places that add it to the list.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 5600 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
The silicates are the most abundant and chemically complex group of minerals. All silicates have silica as the basis for their chemistry. "Silica" refers to SiO2 chemistry. The fundamental molecular unit of silica is one small silicon atom surrounded by four large oxygen atoms in the shape of a triangular pyramid - this is the silica tetrahedron - SiO4. Each oxygen atom is shared by two silicon atoms, so only half of the four oxygens "belong" to each silicon. The resulting formula for silica is thus SiO2, not SiO4.
The simplest & most abundant silicate mineral in the Earth's crust is quartz (SiO2). All other silicates have silica + impurities. Many silicates have a significant percentage of aluminum (the aluminosilicates).
Quartz (silicon dioxide/silica - SiO2) is the most common mineral in the Earth's crust. It is composed of the two most abundant elements in the crust - oxygen and silicon. It has a glassy, nonmetallic luster, is commonly clearish to whitish to grayish in color, has a white streak, is quite hard (H≡7), forms hexagonal crystals, has no cleavage, and has conchoidal fracture. Quartz can be any color: clear, white, gray, black, brown, pink, red, purple, blue, green, orange, etc.
The quartz seen here is a broken specimen - no obvious crystal faces are present.
Close-up of an exposed seam of quartz, once vertical in the southern side of St Michael's Mount, now exposed on the top of a fallen granite block.
Quartz Crystals exhibiting elestial growth. Elestial crystals have a distinctive skeletal or etched appearance, characterized by intricate growth patterns and layered formations. These skeletal growth patterns are caused by unstable conditions during their formation. Specimens showing this layered growth are often referred to alligator quartz. Specimen also shows hematite coating. Red Feather Lakes. Larimer Co., Colo.
Quartz countertop keeps your kitchen and bathroom free from stains and scratches. Get the best deal from Granite Granite Inc. for a variety of colors and patterns.
Fossil wood (quartz-permineralized fossil wood)
Plants are multicellular, photosynthetic eucaryotes. The oldest known land plant body fossils are Silurian in age. Fossil root traces of land plants are known back in the Ordovician. The Devonian was the key time interval during which land plants flourished and Earth experienced its first “greening” of the land. The earliest land plants were small and simple and probably remained close to bodies of water. By the Late Devonian, land plants had evolved large, tree-sized bodies and the first-ever forests appeared.
The fossil shown above is "petrified wood", which is a horrible term for what is technically called permineralization. Biogenic materials such as wood or bone have a fair amount of small-scale porosity. After burial, the porosity of wood or bone can get partially or completely filled up with minerals as groundwater or diagenetic fluids percolate through. The end result is a harder, denser material that retains the original three-dimensionality (or close to it). The wood or bone has become “petrified”. Well, no - it’s become permineralized. Not surprisingly, the most common permineralization mineral is quartz (SiO2). Sometimes, fossil wood and bone have been permineralized with radioactive minerals such as black uraninite (UO2) or yellowish carnotite (K2(UO2)2(VO4)2·3H2O). Recently, fossil bones permineralized with cinnabar have been identified (García-Alix et al., 2013, Lethaia 46: 1-6).
Quartz Hill 2560m, has two summits one in VE7 the other in VE6 land. For a winter ascent it is a 18km ski with 840m ascent starting from the Sunshine Ski-hill car-park. For the less aesthetic a gondola will cut your distance and ascent in half. Although a popular back country ski destination, this peak should only be attempted by those properly qualified in avalanche training [AST1 minimum] and fully equipped with probes beacons and shovels. The avalanche rating for the area of travel today was "CONSIDERABLE" down from last weeks NO-GO of "HIGH" [see avalanche.ca for ratings).
Today I was fortunate enough on many levels to have a ski buddy to do this trip [previous SOTA activations have been solo].
* Its a must to have a partner when traveling in avalanche terrain
* Ski buddy dug a nice snow pit for us to shelter somewhat out of the high velocity wind
* acted as a human activated logbook scribe we shared an ear-bud (future Ham?)
* Ski Buddies also take great photos!
We made good time to the top of the Sunshine ski area before ducking under the out of bounds marker line. 4km followed of recent ski tracks before the final ascent up a ridge line to the VE6 Summit. upon reaching the ridge temperatures started to rapidly fall as we became exposed to a strong NW wind. This wind was consistent in direction and increased to about 30km/hr as we approached the summit. At -12 Celsius this effectively -22 with wind chill. Not ideal operating conditions.
I use a 1/4 wave vertical tuned to 20 meters and add up to 24 hanging counterpoise radials for improved take off. However today's wind and low temperatures reduced me to 2 radials which I managed to stream NW-SE because of the wind. The upside was I only needed 1 guy for the Vertical given the consistent and high velocity wind loading (don't try this at home, unless your sure of the wind. Since we had spent over an hour in the air blast I was pretty sure of its stability.
We made good time to the peak due to the bluebird sky and awesome snow conditions. Ski buddy was kind enough to dig a snow pit for us to huddle in while I put up the antenna. I was on the air about 30 minutes early and quickly racked up 5 QSO in 20 minutes on 20 meters. Given the unpleasant operating position I was on the air for only 45 minutes so sorry to any of the usual crowd if you missed me.
My signal was quite weak today which I blame on the high wind bending my vertical into half parabola. It seems anywhere around here, you are exposed to an arctic blast at this time of year above 2100m.
Many thanks to those who did have the patience with my particularly weak signal today. And a big Oh! Canada! to Michael VA6FUN for the first VA6 VA6 Summit activation [I was not even using a tuned radial for 40m.
Call Me You Distance
K0Yo 35 56 1467km
KU6V 34 57 1614km
N4EX 44 55 3385km
W4ZV 44 33 3311km
NS7P 22 22 959km
NS7P 22 55 959km 40m
VA6FUN 22 58 410km 40m
PS: Elasticated shower caps are great for fitting over the KX3 when your being sandblasted with snow.
Our return to civilization was uneventful, it was great to talk with my ski buddy without having to yell. We even made it back to the ski hill just as the Starbucks closed but they were willing to fill our weary bodies with hot-chocolate before our final 4km ski out.
Awesome day, executed safely, in a harsh and potentially dangerous environment !
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 5600 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
The silicates are the most abundant and chemically complex group of minerals. All silicates have silica as the basis for their chemistry. "Silica" refers to SiO2 chemistry. The fundamental molecular unit of silica is one small silicon atom surrounded by four large oxygen atoms in the shape of a triangular pyramid - this is the silica tetrahedron - SiO4. Each oxygen atom is shared by two silicon atoms, so only half of the four oxygens "belong" to each silicon. The resulting formula for silica is thus SiO2, not SiO4.
The simplest & most abundant silicate mineral in the Earth's crust is quartz (SiO2). All other silicates have silica + impurities. Many silicates have a significant percentage of aluminum (the aluminosilicates).
Quartz (silicon dioxide/silica - SiO2) is the most common mineral in the Earth's crust. It is composed of the two most abundant elements in the crust - oxygen and silicon. It has a glassy, nonmetallic luster, is commonly clearish to whitish to grayish in color, has a white streak, is quite hard (H≡7), forms hexagonal crystals, has no cleavage, and has conchoidal fracture. Quartz can be any color: clear, white, gray, black, brown, pink, red, purple, blue, green, orange, etc.
The quartz seen here is an unbroken crystal seen from above and displaying its hexagonal shape.
Amethyst (= purple quartz) from Brazil. (public display, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are about 5400 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
The silicates are the most abundant and chemically complex group of minerals. All silicates have silica as the basis for their chemistry. "Silica" refers to SiO2 chemistry. The fundamental molecular unit of silica is one small silicon atom surrounded by four large oxygen atoms in the shape of a triangular pyramid - this is the silica tetrahedron - SiO4. Each oxygen atom is shared by two silicon atoms, so only half of the four oxygens "belong" to each silicon. The resulting formula for silica is thus SiO2, not SiO4.
The simplest & most abundant silicate mineral in the Earth's crust is quartz (SiO2). All other silicates have silica + impurities. Many silicates have a significant percentage of aluminum (the aluminosilicates).
Quartz (silicon dioxide/silica - SiO2) is the most common mineral in the Earth's crust. It is composed of the two most abundant elements in the crust - oxygen and silicon. It has a glassy, nonmetallic luster, is commonly clearish to whitish to grayish in color, has a white streak, is quite hard (H≡7), forms hexagonal crystals, has no cleavage, and has conchoidal fracture. Quartz can be any color: clear, white, gray, black, brown, pink, red, purple, blue, green, orange, etc.
Purple quartz is called amethyst. The coloring agent for amethyst is not agreed upon. Some workers say that it is due to Fe+4 impurity, some say the impurity is Fe+3, and others say it is Mn.
From museum signage:
"This geode was formed when amethyst crystals grew in an air bubble in basalt flows of Brazil.
Geodes are rounded, hollow bodies lined inside with crystals. The outer shell is typically formed of dense chalcedony, a type of quartz, and the inside is lined with crystals. The crystals lining this exceptionally large geode from brazil are amethyst, a semi-precious variety of quartz. Quartz crystals frequently form the inner lining of geodes, although crystals of calcite, dolomite, and other minerals occasionally are found.
Geodes are products of sedimentary environments, usually forming in limestones but also occurring in shales. They originate in a cavity in the rock, and grow by expansion. The crystals lining the inside of the geode form last, precipitated from ground water filling the cavity.
"
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Photo gallery of quartz and amethyst
www.mindat.org/gallery.php?min=3337
and
Red quartz is thought to heal disorders related to the reproductive system, including problems of infertility.
It can improve circulation and help assimilate iron into the bloodstream. This crystal also stimulates the adrenal glands and invigorates stagnant "chi," or circulatory life energy. It is a good stone for people suffering from chronic fatigue.
It can also strengthen one's sense of willpower and resolve. This stone has a reputation of assisting with creative endeavors and can be used either to revive the creative impulse in a person who feels blocked or to harmonize creativity between people working together on a project. Red quartz can help with building and maintaining a sense of confidence. It can improve the ability to learn and to digest experiences. It can help make sense of apparent chaos.