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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…
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jade chinese new china ed also neolithic white london zealand culture canada stone known mineral māori asia jadeite york minerals
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Nephrite | Absorption spectra | Vague line may be present at 500 nm, but rarely any lines. Rarely, in stones of exceptional gem quality, vague lines in the red part of the spectrum may be seen. | 1.00 | infobox |
| Nephrite | Birefringence | usually not detectable | 1.00 | infobox |
| Nephrite | Category | Inosilicate | 1.00 | infobox |
| Nephrite | Color | Translucent to opaque and often mottled. Light to dark green, yellow to brown, white, gray, black. | 1.00 | infobox |
| Nephrite | Crystal habit | massive | 1.00 | infobox |
| Nephrite | Crystal system | monoclinic | 1.00 | infobox |
| Nephrite | Formula | Ca2(Mg,Fe)5Si8O22(OH)2 | 1.00 | infobox |
| Nephrite | Fracture | splintery to granular | 1.00 | infobox |
| Nephrite | Luster | dull | 1.00 | infobox |
| Nephrite | Mohs scale hardness | 6.0 to 6.5 | 1.00 | infobox |
| Nephrite | Optical properties | Double refractive with anomalous aggregate reaction | 1.00 | infobox |
| Nephrite | Pleochroism | none | 1.00 | infobox |
| Nephrite | Polish luster | vitreous to greasy | 1.00 | infobox |
| Nephrite | Refractive index | 1.606 to 1.632+0.009 −0.006 | 1.00 | infobox |
| Nephrite | Specific gravity | 2.95+0.15 −0.05 | 1.00 | infobox |
| Nephrite | Ultraviolet fluorescence | inert | 1.00 | infobox |
| Nephrite | is a | variety of the calcium | 0.90 | text |
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