| General Information |
|---|
| A variety or type of: | Jade |
|---|
| Other Names/Trade Names: | |
|---|
| Chemical Formula | Walter Schumann, Gemstones of the world (2001) More from other references |
|---|
| Nephrite Treatments |
|---|
| Less commonly dyed than jadeite-jade because of its more compact structure, may be impregnated - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 5 |
| Physical Properties of Nephrite |
|---|
| Mohs Hardness | 6 to 6.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
|---|
| Specific Gravity | 2.90 to 3.10Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
|---|
| Tenacity | BrittleWalter Schumann, Gemstones of the world (2001) |
|---|
| Cleavage Quality | NoneArthur Thomas, Gemstones (2009) |
|---|
| Fracture | SplinteryArthur Thomas, Gemstones (2009) |
|---|
| Optical Properties of Nephrite |
|---|
| Refractive Index | 1.600 to 1.627Walter Schumann, Gemstones of the world (2001) More from other references |
|---|
| Optical Character | Biaxial/-Arthur Thomas, Gemstones (2009) |
|---|
| Birefringence | 0.027 to often moreWalter Schumann, Gemstones of the world (2001) More from other references |
|---|
| Pleochroism | NilArthur Thomas, Gemstones (2009) |
|---|
| Dispersion | NilArthur Thomas, Gemstones (2009) |
|---|
| Chatoyancy | YesUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
|---|
| Colour |
|---|
| Colour (General) | Green, gray-green, reddish-brown, blackUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
|---|
| Transparency | Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
|---|
| Fluorescence & other light emissions |
|---|
| Fluorescence (General) | NoneWalter Schumann, Gemstones of the world (2001) |
|---|
| Crystallography of Nephrite |
|---|
| Crystal System | MonoclinicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
|---|
| Habit | FibrousHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
|---|
| Geological Environment |
|---|
| Where found: | Occurs in serpentine rocks, and as river or beach pebbles.Walter Schumann, Gemstones of the world (2001) More from other references |
|---|
| Further Information |
|---|
| Mineral information: | Nephrite information at mindat.org |
|---|
| Significant Gem Localities |
|---|
| Australia | | |
| Nichol (2000) | | Canada | | |
| Nichol (2000) | |
| Nichol (2000) | | Italy | | |
| Nichol (2000) | | Switzerland | | |
| Nichol and Giess (2005) | | Taiwan | | |
| Adams and Beck (2009) | | USA | |
- Santa Lucia Mts (Santa Lucia Range)
- Los Burros Mining District
| Paradise (1985) | |
| Ward (1999) |
|
|
