| General Information |
|---|
| A variety or type of: | Andalusite |
|---|
| Chemical Formula | Gemdat.org, Management Team (2012) |
|---|
| Physical Properties of Viridine |
|---|
| Mohs Hardness | 7 to 7.5Arthur Thomas, Gemstones (2009) |
|---|
| Specific Gravity | 3.05 to 3.21Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Cleavage Quality | DistinctUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
|---|
| Fracture | UnevenArthur Thomas, Gemstones (2009) |
|---|
| Optical Properties of Viridine |
|---|
| Refractive Index | 1.629 to 1.660Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
|---|
| Optical Character | Biaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Birefringence | 0.007 to 0.013Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Dispersion | 0.016Arthur Thomas, Gemstones (2009) |
|---|
| Colour |
|---|
| Colour (General) | Grass greenGemdat.org, Management Team (2012) |
|---|
| Causes of Colour | Iron and manganese content.Arthur Thomas, Gemstones (2009) |
|---|
| Transparency | Transparent,Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
|---|
| Lustre | VitreousGemdat.org, Management Team (2012) |
|---|
| Crystallography of Viridine |
|---|
| Crystal System | OrthorhombicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
|---|
| Habit | Prismatic habit with vertically striated prisms which are nearly square in section and capped with pyramidsMichael O’Donoghue, Gems, Sixth edition (2006) |
|---|
| Further Information |
|---|
| Mineral information: | Viridine information at mindat.org |
|---|
| Significant Gem Localities |
|---|
|
