نفریت
Sign in to saveNephrite is a variety of the calcium, magnesium, and iron-rich amphibole minerals tremolite, actinolite or ferro-actinolite (aggregates of which also make up one form of asbestos). The chemical formula for nephrite is Ca2(Mg, Fe)5Si8O22(OH)2. It is one of two different mineral species called jade. The other mineral species known as jade is jadeite, which is a variety of pyroxene. While nephrite jade possesses mainly grays and greens (and occasionally yellows, browns, black or whites), jadeite jade, which is rarer, can also contain blacks, reds, pinks and violets. Nephrite jade is an ornamental
Key facts
- Mineral.name
- Nephrite
- Mineral.category
- Inosilicate
- Mineral.boxbgcolor
- 9dec76
- Mineral.image
- Nephrite jordanow slaski.jpg
- Mineral.caption
- Nephrite from Jordanów Śląski (Poland)
- Mineral.formula
- Ca2(Mg,Fe)5Si8O22(OH)2
- Mineral.color
- Translucent to opaque and often mottled. Light to dark green, yellow to brown, white, gray, black.
- Mineral.habit
- massive
- Mineral.system
- monoclinic
- Mineral.fracture
- splintery to granular
- Mineral.mohs
- 6.0 to 6.5
- Mineral.luster
- dull
- Mineral.polish
- vitreous to greasy
- Mineral.refractive
- 1.606 to
- Mineral.opticalprop
- Double refractive with anomalous aggregate reaction
- Mineral.birefringence
- usually not detectable
- Mineral.pleochroism
- none
- Mineral.fluorescence
- inert
via Wikipedia infobox