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Gemstones are rocks or minerals that can be used for ornamental purposes. To make the gemstones beautiful, the minerals are often cut and polished to produce different shapes and make the stones sparkle.


More than 130 different types of minerals are used for gemstones. The most popular gemstones are diamonds, rubies, emeralds and sapphires. Other gemstones are classified as precious or semi-precious.


Some places to sell gemstones include auction houses, independent jewelry stores, pawn or antique shops, estate dealers and private buyers. Searching online auction listings can make it easier to estimate the value of similar gemstones.


To find the value of gemstones, first use an electronic microbalance scale to weigh the gem and determine the carat. Next, use an optical measuring device to measure proportions, facet angles, the cut of the stone, and how it reflects and refracts light. Next, determine the grade of the gem as it pe


Pink gemstones include morganite, pearls and rubellite. Morganite can be a subtle or bold shade of pink. Pearls are available in soft pink, and rubellite is a combination of vivid pink and ruby shades.


Gold Crafters Exchange and Joden Jewelry are two retailers who buy used gemstones. Their gem-buying websites are GoldCraftersExchange.com and SellMyDiamonds.com, respectively. TiffanyBuyer.com is an online buyer of used gemstones.


Identification of gemstones involves examining the gemstone's color, hardness and light intensity and the way the gemstone reflects light. According to the Gemological Institute of America, identification requires the use of a refractometer, a microscope and other equipment.


Good ideas for selling gemstones include taking a gemology course online or on a campus, creating a business plan that covers selling methods, and contacting a dealer who supplies gemstones. Some sellers transact online or connect with buyers through online auction sites. Others put up physical stor


There are the precious gemstones like diamond, ruby, sapphire and emerald. There are also the semi-precious gemstones like turquoise, amethyst, garnet and quartz. There are also the gemstones that are considered birthstones (like aquamarine for the month of March and peridot for the month of August)


Some of the gemstones traditionally associated with good luck include agate, jasper and tiger eye, according to Gemstone Meanings. Other stones that are said to bring good luck are malachite and beryl.