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This reference card of 12 natural gemstones features popular specimens used in fashion and jewelry in their rough form. Once collected, the best pieces are cut and polished to be the gleaming gems seen in store windows and glass cases. This card can be used as a portable identification key to determine whether or not a specimen is indeed a gemstone, or as a handy reference in a geology classroom. Each card is built from robust cardstock, and each sample is carefully glued into place. Our cards are all built with care in the United States.