is macrocrystalline quartz in colors ranging from green to pale lilac and deep reddish purple. It can be transparent to translucent and many different shapes and sizes, either faceted or cut en cabochon. Value per carat in amethyst, unlike many gems, doesn't rise exponentially with weight as it is readily available in large sizes; but depends almost entirely on color. The "Siberian" deep purple with red and blue flashes commands the highest prices. Green amethyst, new to the market, is produced by heat treatment. Brazil is one of the most important sources for several gem types, including topaz, emerald, citrine and amethyst. Purple amethyst gemstones are great for statement jewelry pieces, such as large pendants and cocktail rings because they are available in large sizes. Amethyst is the February birthstone and the birthstone for those born under the sign of Pisces. Amethyst is believed to be a stone of sobriety. From this page, you can filter the results further by using the left-hand menu. By using the top menu, you can search by carat weight, size, price and other factors, to enable you to find the exact amethyst gemstones that you are looking for. All items are in stock and ready to ship.