Russian Sphene 8 mm / 1,7 ct emerald cut
$ 88.74
incl. 25.5 % VAT
Model number:
710011
Product identifier:
710011
Sphene / Titaniitti
Erittäin harvinainen värisävy
Alkuperä (todennäköinen) : Venäjä
Paino ( ct noin ) : 1,7
Mitat ( mm noin ) : 8 x 6 x 4
Hionta : viistehiottu
Puhtaus :VVS
Erinomainen Erittäin hyvä Hyvä ”kakkosluokkaa”
Hionta X
Loisto X
Väri X
Ominaista : kirkas venäläinen titaniitti / spehne
Sphene is a rare collector stone with an unusually high refractive index and and a hardness of 5 -5.5. Because of it's high dispersion and refractive index, a well cut sphene can display stunning brilliance. Sphene is somewhat soft and as a result is more suitable as a pendant than as a ring stone. Sphene is rarely very clean. |
| Known Facts | |
| Color Key: | Green, yellow. brown |
| Refractive Index:: | (1.885-1.990,)-(1.915-2.050) |
| Chemical Composition: | CaTiSiO5 |
| Hardness: | 5.5 |
| Density: | 3.52-3.54 |
| Crystal Group: | Monoclinic |
| Ocurrence: | Austria, Dheirene-Madagascar, India, USA, Brazil.Burma |
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