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Sphene from Madagascar
No. 637: Apollo A Cut, SI2, 1.87 ct., 17.7 x 7.7 x 5.6 mm, , faceted by: Robert Drummond, $93.50 Sold
Sphene, a calcium/titanium silicate, has a Mohs' hardness of 5-5.5. Because of its softness, sphene requires the talents of a skilled metalsmith to be successfully set in jewelry. Because of its high dispersion, faceted sphene shows a beautiful display of spectral colors. When carefully set in a pendant or pin, sphene looks spectacular.