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Search Location   All Locations California Colombo Ohio Category   All Categories Alexandrite Alexandrite Catseye Amethyst Ametrine Andalucite Apatite Apatite Cat's Eye Aquamarine Aquamarine Cat's Eye Bargain Lots Beryl Chrysoberyl Chrysoberyl Catseye Chrysoberyl Stars Citrine Cobalt Spinel Crystals Diopside Diopside Cat's Eye Diopside Star Enstatite Feldspar Fluorite Garnet Garnet Color Change Garnet Grossular Garnet Hessonite Garnet Rhodolite Garnet Spessartine Garnet Star Garnet Tsavorite Investment Gems Iolite Konerupine Kunzite Kyanite Lime Citrine Moonstone Mystic Topaz Opal Padparasha Pairs Peridot Quartz Quartz Catseye Quartz Stars Rare Gems & Minerals Ruby Ruby Star Rutile Sapphire Blue Sapphire Cats Eye Sapphire Green Sapphire Lavender Sapphire Other Sapphire Pink Sapphire Purple Sapphire White Sapphire Yellow Scapolite Scheelite Silimanite Silimanite Catseye Sinhalite Special Cut Gems Sphene Spinel Spinel Star StarSapphire Taaffeite Topaz Topaz Catseye Tourmaline Tourmaline Bi-Color Tourmaline Chrome Tourmaline Col/Chg Zircon       Alexandrite Enstatite Opal Scapolite Alexandrite Catseye Feldspar Padparasha Silimanite Catseye Amethyst Fluorite Peridot Sinhalite Ametrine Garnet Quartz Sphene Andalucite Garnet Color Change Quartz Catseye Spinel Apatite Garnet Grossular Quartz Stars Spinel Star Apatite Cat's Eye Garnet Hessonite Ruby Star Sapphire Aquamarine Garnet Rhodolite Ruby Star Taaffeite Aquamarine Cat's Eye Garnet Spessartine Rutile Topaz Beryl Garnet Star Sapphire Blue Topaz Catseye Chrysoberyl Garnet Tsavorite Sapphire Cats Eye Tourmaline Chrysoberyl Catseye Iolite Sapphire Green Tourmaline Bi-Color Chrysoberyl Stars Konerupine Sapphire Lavender Tourmaline Col/Chg Citrine Kunzite Sapphire Other Zircon Cobalt Spinel Kyanite Sapphire Pink     Diopside Lime Citrine Sapphire Purple     Diopside Cat's Eye Moonstone Sapphire White     Diopside Star Mystic Topaz Sapphire Yellow       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. Gemological Information Color : 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.