Cyprine
Cyprine could be the very uncommon blue variety of Vesuvianite, also known as Cupreous Vesuvianite or Cupreous Idocrase because it is blue that is colored the current presence of Copper.
The only known sources of Cyprine are Kleppan, Sauland, Hjartdal, Telemark, Norway; Jacoksberg Mine, Nordmark, Filipstad, Sweden; Franklin Mine, Franklin Mining District, Sussex County, brand new Jersey, USA and a comparatively new get in Pakistan. Only material from Norway, Sweden and Pakistan are suitable for faceting and gems are usually included and small.
| Crystallography: | Tetragonal – Dipyramidal |
| Crystal Habit: | Vesuvianite: As short pyramidal to long prismatic crystals, to 15 cm, morphologically complex, with up to 30 forms reported on one crystal; columnar, granular, massive. |
| Twinning: | Vesuvianite: Twinned domains observed at a very fine scale. |
| Cleavage: | [110] Indistinct, [100] Indistinct, [001] Indistinct |
| Fracture: | Subconchoidal to Irregular |
| Tenacity: | Brittle |
| Hardness (Mohs): | 6.5 – 7.0 |
| Density: | 3.32 – 3.43 (g/cm3) |
| Luminescence: | None |
| Radioactivity: | Not Radioactive |
| Color: | Blue, Grayish Blue |
| Transparency: | Transparent to Translucent, Opaque |
| Luster: | Vitreous to Resinous |
| Refractive Index: | 1.700 – 1.752 Uniaxial ( – ); Uniaxial ( + ) and Biaxial examples are common |
| Birefringence: | 0.0030 – 0.0060 |
| Dispersion: | Relatively Strong |
| Pleochroism: | Weak |
