Spessartine from China
General Category Nesosilicate Chemical formula Mn(II)3Al2(SiO4)3 Strunz classification 09.AD.25 Identification Molar mass 495.03 g Color yellow through red Crystal habit massive to crystalline Crystal system Isometric - Hexoctahedral Fracture sub Conchoidal Tenacity brittle Mohs scale hardness 6.5 - 7.5 Luster vitreous Streak white Diaphaneity transparent to translucent Specific gravity 4.15 (+.05, -.03) Optical properties Isotropic, often anomalous double refractive Refractive index 1.810 (+.004, -.020) Birefringence none Dispersion weak Absorption spectra bands at 410, 420, 430nm (or merging to form cutoff below 430nm; also bands at 460, 480, 520nm. Possible weak bands at 504, or 573nm  References 
The name is a derivative of Spessart in Bavaria, Germany, the type locality of the mineral. It occurs most often in granite pegmatite and allied rock types and in certain low grade metamorphic phyllites. Sources include Australia, Myanmar, India, Afghanistan, Israel, Madagascar, Tanzania and the US. Spessartine of an orange-yellow has been called Mandarin garnet and is found in Madagascar. . Violet-red spessartines are found in rhyolites in Colorado and Maine.
Spessartine forms a solid solution series with the garnet species almandine. Well formed crystals from this series, varying in color from very dark-red to bright yellow-orange were found in Latinka, Rhodope Mountains, Kardzhali Province, Bulgaria  .
- ^ a b c d Gemological Institute of America, GIA Gem Reference Guide 1995, ISBN 0-87311-019-6
- ^ a b c d Webmineral Spessartine page
- ^ a b c d e Mindat Spessartine page
- ^ a b c d Handbook of Mineralogy Spessartine page
- ^ "Spessartine from Latinka, Bulgaria:". http://www.mindat.org/locentry-216291.html.
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