DetailsSpecimens of rock crystal points found in Madagascar, they measure approximately between 2 to 2.5 inches in size and weigh roughly 100 grams. Quartz is one of the most common minerals found on the surface of earth, a silica mineral that is found as a common constituent in many rocks. It has many other variations depending on chemistry of colour such as amethyst, citrine, jasper, agate and more. These samples are perfect for smaller mineral collections and for educational use.
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