How is natural amethyst formed?

Naturally produced amethyst forms a beautiful purple color due to the presence of iron, manganese and other minerals. Natural amethyst usually has natural ice cracks or white cloud impurities. Amethyst with gem value is produced in geodes of volcanic rock, pegmatite, limestone, and shale.

The color of amethyst has long been thought to be caused by the mixing of high-priced iron or manganese, titanium and other pigment elements; but when heated to 240 ~ 270 ℃, the purple fades into yellowish brown, brown; and over time Roentgen ray irradiation can restore the original purple color, so some people think that it is an optical phenomenon caused by some defects in the internal atomic arrangement. In China, amethyst is associated with the Five Elements of Wood and the Luan Formation for purification.

Synthetic amethyst has a uniform color and does not contain gas-liquid inclusions; the color of natural amethyst is unevenly distributed, spread in irregular flakes, and often contains gas-liquid inclusions. Amethyst is mainly formed in hydrothermal veins under lower temperature and pressure conditions.

Extended information:

Origin:

Amethyst is widely distributed around the world, and the following areas are the main producing areas.

Uruguay:

The amethyst produced in Uruguay has always been the most advanced purple color among amethysts. This kind of purple is very deep, very delicate, with a burgundy "fire". Nearly discontinued, it is a must-have item in fine jewelry stores around the world.

Korea:

The color is also very dark, but the main color is a bit "blue-purple". This is also a very delicate and flattering color. Unfortunately, the output is getting less and less.

Zambia:

Zambian amethyst usually has small particles and rarely has very good clarity, but its color is strange, with a beautiful red tint in the purple. It can be worn even from a distance. It doesn't look black, so it has a higher value, but unfortunately the output is not large.

Baidu Encyclopedia-Amethyst