Leave No Stone Unturned: A Holiday Gemstone Review

January Garnet. Garnets are among the few gemstones that are unenhanced, and they come in every color of the rainbow except blue. To prepare for the holiday selling season, check which colors you have in stock, and take note of where they're displayed. Sometimes colored stones are grouped by color rather than by species or birthstone. The traditional color, a brownish or purplish red, is called almandite. Most people think this is garnet's only color. Not true. There are two greens—the emerald-color tsavorite from Kenya and Tanzania, and the somewhat peridot-color demantoid. (Check the demantoid for dispersive fire.) Historically, demantoid comes from Russia, but yours may come from newer finds in Arizona and Mexico as well as Nigeria. The orangey-yellow spessartite from Nigeria and Brazil is a popular garnet. Reddish-purple rhodolite (which takes its name from the rhododendron f

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