|The Very Highest Quality Sphene Information...|
Sphene is a brilliant transparent yellowish-green or green gemstone with a high lustre and pronounced fire. Its name comes from the word sphen meaning wedge shaped, as it normally occurs in wedge shaped crystals. Although sphene is rather soft, it is always cut as a facetted stone, which suits its lively appearance, rather than a cabochon, which is more normal for stones softer than 7 on Moh's scale. If used in rings, it should be worn with care because its softness means it will scratch relatively easily.
Another name for sphene is titanate, because of its titanium content, but this is often reserved for the black or reddish brown non-gem quality material.
Sphene is usually yellow brown or green. The specimen in our photograph shows flashes of red.
Sphene is trichroic, the colours for the main axes being greenish yellow, reddish yellow, and almost colourless, the exact shades depending on the body colour of the stone. The dispersion of sphene is higher than that of diamond.
Sphene is found in Austria, Switzerland, Canada, Madagascar, Burma, and Mexico.
|Chemical Composition and Name||Calcium Titanium Silicate CaTiSiO5|
|Hardness||5 to 5.5|
|Refractive Index||1.885 - 1.990 to 1.915 - 2.050|
|Bi-refringence||0.105 to 0.135|
|Specific Gravity||3.45 - 3.56|
|Gemstone||Weight||Shape||Size & Description||Available||Price £||Price $|
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