6カラットの宝石 Buy gems by carat weight. Shop from our extensive range of beautiful, natural 6 carat gems. Browse the largest selection of natural loose colored gemstones available in 6 carats. Our large gemstone selection includes many popular gem types, such as amethyst, aquamarine, topaz, emerald and garnet, and lesser-known gems, including sphene, ruby in fuchsite and sphalerite. From here, you can use our filters at the top or on the left-hand side to find gems by gem type, color, shape, cut and so on. For example, select 'peridot' to see all of our 6-carat peridot gems. Select 'blue' to shop for 6-carat blue gems. You can also filter by single, pairs, lots, faceted gems or cabochons by using the check boxes at the top.