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