![]() Almandine garnet is an iron aluminum silicate with the formula Fe3Al2Si3O12 or Fe3Al2(SiO4)3. Pyrope garnet is a magnesium aluminum silicate with the formula Mg3Al2Si3O12 or Mg3Al2(SiO4)3 in pure form, though no pyrope is pure. What is a pyrope garnet? Or almandine garnet? Proteus garnets are in the pyralspite series, which are iron-rich and have the formula 3Al2(SiO4)3. Ugrandite has the species uvarovite, grossular, and andradite.Įach species can have its own varieties, many of which are hybrids, like the pyrope-almandine hybrid rhodolite. Pyralspite has the species pyrope, almandine, and spessartite. ![]() The term “garnet” actually describes a large, complex group of gemstones split into two series (pyralspite and ugrandite) and species within each series. They can similarly indicate geological timelines when used as a geochronometer or thermochronometer. Industrial-grade garnets produced for abrasives may be called “rock garnet.” Some unexpected applications for abrasive garnet are woodworking and water filtration.Īdditionally, garnets can help geologists study the temperatures and pressures that rocks form under in a field called geothermobarometry. These abrasives may be used in sandpaper or replace silica for sandblasting. Outside the gem world, garnets have various industrial uses.īecause of its superior Mohs hardness among garnets, almandine is great for abrasives. Garnet is also the traditional 2nd wedding anniversary gem.Īlmandine garnets, specifically, are the state gemstone of Connecticut, USA, the “Constitution State.” Garnets are January birthstones as well as zodiac stones for Capricorn and Aquarius signs. The proteus garnets created were of the garnet species pyrope, almandine, or a mixture of these two. Proteus is a semi-precious gemstone in the garnet family. Today, we’ll fill you in on all the proteus garnet facts, from the history and meaning of these gems to their benefits and properties. But they’re still relevant to the modern history of garnet gemstones. Today, proteus garnets are no longer commercially sold, at least for now. The term “proteus” was originally a marketing term for what was believed to be the first treated garnets commercially available as gems. ![]() ![]() Reflected light makes proteus garnets look metallic and dark gray, while transmitted light makes them look dark red. Proteus is a variety of the gemstone garnet that’s been treated to have a metallic coating and dual appearance in different types of lighting. ![]()
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