What Colour is anthophyllite?
| Anthophyllite | |
|---|---|
| Color | Gray to green, brown, and beige |
| Crystal habit | Rarely as distinct crystals. Commonly lamellar or fibrous. |
| Cleavage | Perfect on {210}, imperfect on {010}, {100} |
| Tenacity | Brittle; elastic when fibrous |
Where is anthophyllite found?
anthophyllite, an amphibole mineral, a magnesium and iron silicate that occurs in altered rocks, such as the crystalline schists of Kongsberg, Nor., southern Greenland, and Pennsylvania. Anthophyllite is commonly produced by regional metamorphism of ultrabasic rocks.
What is anthophyllite used for?
Anthophyllite was used in limited quantities for insulation products and construction materials. It also occurs as a contaminant in chrysotile asbestos, vermiculite and talc. It may have a grey, dull green or white color.
Is actinolite a Pleochroic?
Strong brown or green coloration and pleochroism, and 60o-120o cleavage angles identify hornblende. Actinolite is similar, but its color ranges from light green (Fe-poor varieties) to dark green (Fe-rich varieties).
What rock is talc commonly associated with?
Talc is found as a metamorphic mineral in veins, in foliated masses, and in certain rocks. It is often associated with serpentine, tremolite, forsterite, and almost always with carbonates (calcite, dolomite, or magnesite) in the lower metamorphic facies.
Where does Hypersthene come from?
Hypersthene gemstones have been found in the Adirondack Mountains of New York in the United States as well as Labrador and Quebec, Canada.
What is anthophyllite asbestos?
Anthophyllite Asbestos Anthophyllite can range from brown to yellowish in color and is composed mainly of magnesium and iron. One of the more rare forms of asbestos, anthophyllite was not used as often in consumer products, but can be found in some cement and insulation materials.
Does chrysotile break down in lungs?
The available data suggest that chrysotile is deposited in the parenchyma but is cleared extremely rapidly, with the vast bulk of fibres removed from human lungs within weeks to months after inhalation; by comparison, amphibole clearance half-lives are of the order of years to decades.
How do you identify Hornblende in a thin section?
In PPL a thin section of Hornblende ranges from yellow -green to dark brown. Green varieties usually have X= light yellow green, Y=green or grey-green and Z=dark green. Brownish varieties have X=greenish-yelow/brown, Y=yellowish to reddish brown and Z=grey to dark brown.
What is the Lustre of feldspar?
Vitreous
| Feldspar | |
|---|---|
| Mohs scale hardness | 6.0–6.5 |
| Luster | Vitreous |
| Streak | white |
| Diaphaneity | opaque |