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Sphene
Sphen,
means wedge shaped as it occurs normally, is a brilliant transparent
yellowish-green or green with a high lustre and pronounced fire. It is
also widely called as 'Titanium,' because of the titanium content in
it. Titanium content sphen is often reserved for black or reddish
brown non-gem quality material.
Twinning is common in titanite. The best example of it is Soem, which
comes from Pakistan, almost twinned.
Sphene is a fairly rare stone and is classed as collector's stone. It
is found in Austria, Switzerland, Canada, Madagascar, Burma, and
Mexico. The hardness is 5 - 5.5, a soft stone on Mohs scale and
specific gravity is 3.45 - 3.56.
|
Name |
|
|
|
|
|
|
|
|
|
| Sphene |
5+ |
3.52-5.54 |
Monoclinic |
Perfect |
1.885-2.050 |
+0.105 +0.135
|
0.051 |
Variable |
None |
|
