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Garnierite is a green mineral, ranging from light yellow-green to dark green. [3] [5] The color comes from the presence of nickel in the mineral structure for magnesium. [4] Noumeaite (later determined to be a member of the garnierite family) varies in hardness, from soft and brittle to hard enough to carve into figurines and the like. [11]
Malachite is a copper carbonate hydroxide mineral, with the formula Cu 2 CO 3 (OH) 2.This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical precipitation.
The bright green, lustrous antigorite richly covering this specimen has an unusual knobby/bubbly/drusy form. Bowenite (Antigorite) from Asbestos mine, Thurman Township, Warren County, New York, US Polished slab of bowenite serpentine, a variety of antigorite.
Layer and vein shungite varieties, and shungite filling cavities and forming the matrix of breccias, are interpreted as migrated petroleum, now in the form of metamorphosed bitumen. [10] Solid-bitumen shungite is predominantly amorphous , though as with many carbon deposits it contains trace amounts of carbon allotropes such as graphene sheets ...
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 (PO 4) 4 8 ·4H 2 O.It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.
Roscoelite is a green mineral from the mica group that contains vanadium. The chemical formula is K(V 3+, Al, Mg) 2 Al Si 3 O 10 (OH) 2. [2] Crystals of roscoelite take on the monoclinic form, and are from the 2/m point group. The appearance is semi transparent to translucent coloured olive brown to green brown. The lustre is pearly.
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Fire opal is a transparent to translucent opal with warm body colors of yellow to orange to red. Although fire opals don't usually show any play of color, they occasionally exhibit bright green flashes. The most famous source of fire opals is the state of Querétaro in Mexico; these opals are commonly called Mexican fire opals. [47]
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