Properties
| Category | Inosilicate |
|---|---|
| Formula | Ca2(Mg,Fe)5Si8O22(OH)2 |
| Crystal system | monoclinic |
| Color | Translucent to opaque and often mottled. Light to dark green, yellow to brown, white, gray, black. |
| Crystal habit | massive |
| Fracture | splintery to granular |
| Mohs scale hardness | 6.0 to 6.5 |
| Luster | dull |
| Specific gravity | 2.95+0.15; −0.05 |
From the Wikipedia article
Nephrite 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 stone used in carvings, beads, or cabochon cut gemstones. Nephrite is also the official state mineral of Wyoming.
Source
Source record: crystal-compendium/nephrite/minerals.json. Fetched from English Wikipedia by the operator 2 October 2026.
https://en.wikipedia.org/wiki/Nephrite — revision id 1375476154. Text and properties from Wikipedia, licensed CC BY-SA 4.0.