| General Information |
|---|
| A variety or type of: | Diopside |
|---|
| Other Names/Trade Names: | |
|---|
| Chemical Formula | Gemdat.org, Management Team (2012) |
|---|
| Physical Properties of Violane |
|---|
| Mohs Hardness | 5 to 6Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Specific Gravity | 3.22 to 3.40Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Cleavage Quality | DistinctUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
|---|
| Fracture | ConchoidalArthur Thomas, Gemstones (2009) |
|---|
| Optical Properties of Violane |
|---|
| Refractive Index | 1.668 to 1.703Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
|---|
| Optical Character | Biaxial/+Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Birefringence | 0.024 to 0.030Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Colour |
|---|
| Colour (General) | Violet-blueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Transparency | Translucent,OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Lustre | VitreousArthur Thomas, Gemstones (2009) |
|---|
| Crystallography of Violane |
|---|
| Crystal System | MonoclinicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Habit | MassiveHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Further Information |
|---|
| Mineral information: | Violane information at mindat.org |
|---|
| Significant Gem Localities |
|---|
| Italy | | |
| Gemstones of the world, W.Schumann, 2001, p.190 |
|
|
