| General Information |
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| A variety or type of: | Garnet Group |
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| Varieties/Types: | Umbalite - A light pink to purple pyrope, originally from the Umba River, Tanzania. |
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| Chemical Formula | Gemdat.org, Management Team (2012) |
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| Physical Properties of Pyrope-Spessartine |
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| Mohs Hardness | 7 to 7.5Gemdat.org, Management Team (2012) |
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| Specific Gravity | 3.62 to 4.33Gemdat.org, Management Team (2012) |
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| Tenacity | BrittleGemdat.org, Management Team (2012) |
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| Cleavage Quality | NoneGemdat.org, Management Team (2012) |
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| Fracture | Uneven,ConchoidalGemdat.org, Management Team (2012) |
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| Optical Properties of Pyrope-Spessartine |
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| Refractive Index | 1.730 to 1.820Gemdat.org, Management Team (2012) |
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| Optical Character | IsotropicGemdat.org, Management Team (2012) |
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| Dispersion | 0.022 to 0.027Gemdat.org, Management Team (2012) |
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| Colour |
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| Transparency | TransparentGemdat.org, Management Team (2012) |
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| Lustre | VitreousGemdat.org, Management Team (2012) |
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| Crystallography of Pyrope-Spessartine |
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| Crystal System | IsometricGemdat.org, Management Team (2012) |
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| Further Information |
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| Mineral information: | Pyrope-Spessartine information at mindat.org |
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