The garnets comprise a family of complex silicates with widely varying chemical composition but similar structures. The most common garnet is almandine (or almandite), which is dark brownish- or purplish-red. Garnet is very popular for its excellent hardness (7-7.5) and its brilliance due to its high refractive index.
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Many beautiful gems on the site. Love that you are actually shipped the gem that is shown in the photos. Also cool that they give a write up of each gem detailing hardness, characteristics, and best uses for mounting. Great site! Looking forward to seeing these gems in person.