The natural output of amethyst due to iron, manganese and other minerals to form a beautiful purple, the main colors are lavender, purple-red, deep red, red, dark purple, blue-violet and other colors, to deep purple-red and red is the best, too light purple is more common. Natural amethyst usually has natural ice cracks or white cloudy impurities. Gem-quality amethysts are found in the cavities of volcanic rocks, pegmatites, or tuffs and shales. Amethyst is widely distributed in nature, the main places of origin are Brazil, Russia, South Africa, Madagascar, among which the amethyst produced in the pegmatite deposits of Minas Gerais, Brazil, is renowned for its high quality. Generally Brazilian amethyst cave is mostly mountain amethyst hole, a cut into two can become a very ornamental amethyst hole ornaments. Uruguayan amethyst is mostly in the form of a block, the color is also darker and more purple, smaller particles, more suitable for carving and making a variety of amethyst jewelry.
Imitation Amethyst
The main imitations of natural amethyst on the market are glass and synthetic amethyst.
Amethyst and purple glass have different physical properties. They have completely different performance under orthogonal polarized lenses: amethyst shows four bright and four dark when rotating one week, while glass shows all dark. In addition, in the magnifying glass or microscope, through the stone after the faceted prongs, amethyst can be seen in a prong with two clear images, while as a single refractive material of glass can not see this phenomenon. So generally with 10 times magnification can distinguish between glass and amethyst. Amethyst is a well-crystallized purple single-crystal quartz. From the appearance of the general synthetic amethyst color tone is extremely uniform, unlike natural amethyst will exist in different shades of color changes, but the difference in color tone can not be the only basis for identification. According to its inclusions, color bands and other internal characteristics to make accurate identification. Synthetic amethysts contain fewer gas-liquid inclusions and have a uniform distribution of color, while natural amethysts have a flat, flaky distribution of color. Large synthetic crystals may contain colorless daughter crystal nuclei. Other characteristics of synthetic amethyst are the same as those of natural amethyst, and it is not possible to find the difference between them and natural crystals by conventional testing methods.
Note that most naturally occurring gemstones are stable in color and nature, but the purple color of amethyst is not the most stable state, when baked at high temperatures or exposed to sunlight for long periods of time, amethyst is prone to leg color, or even become more stable light yellow to yellow. Therefore, avoid high temperature and exposure to sunlight when wearing and collecting amethyst. Every 3 months, use a filtering spoon to filter the melted amethyst and soak it for 1 day. Collectors often use the Kokuji bowl in order to see the tree root stump material growing on the bowl. Amethyst crystal clear, color solemn and generous, very suitable for knowledge women to wear, earrings or rings set with an amethyst, to add a few points of solemnity and elegance
