Știri despre bijuterii

custom bracelets manufacturers What kind of stone is a gem? (sub)

Postat pe de Kingjy

The breasts inlaid with gems in the 4th century Roman gold wares, the Grand Cross ribbons inlaid with rubies in Portugal in the 18th century, the crowns and scepters inlaid with various precious gems that symbolize the wealth and power of the British royal family, all of which are surviving The precious gemstone ornaments that have been hidden by various countries for centuries and centuries have remained the same today. Unearthed cultural relics from some ancient civilizations allow us to see many ancient and exquisite gems or jade ornaments. De exemplu, various jade articles found in many ancient cultural sites or ancient tombs in China, gem-inlaid scarabs and baboon pendants found in Tutankhamun’s mausoleum in ancient Egypt, gem masks found in Aztec cultural sites in America, It also highlights the strong and durable characteristics of gemstones. Materials that are easily damaged, faded, or corroded cannot be so durable, they are not called gems, and they are not used to make ornaments.

The third is scarcity.

In nature, natural gemstones have “three disadvantages”: Primul, the number of varieties is small. Among the more than 3,000 minerals that have been discovered by humans, there are only about 200 gem minerals, and there are only more than 20 common ones, which shows that there are few. The second is uneven distribution and few production areas. The world’s gem minerals are widely distributed and unevenly distributed, and some precious gems are produced in a concentrated area, and they have even become a country’s unique gem resources and main economic pillars. Such as emeralds and rubies from Burma, emeralds from Colombia and opals from Australia and Asia. Another example is that diamonds are widely distributed in the world, but there are only more than 20 countries that have entered the commercial production of diamonds, such as South Africa and Botswana. The third is small scale and low output. Because gems are formed under specific geological processes and conditions, mineral varieties with special properties are mostly produced in the form of placer deposits. În general, the scale of mineralization is small and the output is small. This can also be proved by using carat ct (1 carat is equal to 0.2 grams) as the weight measurement unit for gems.

De exemplu, the raw ore of diamonds, diamonds are mined in placers with commercial value, şi 4.5 carats of diamonds can be selected for every 23 tons of placers excavated, of which only 1/10 can reach gem level; while diamonds are mined from primary ore, One carat of diamonds can be obtained for every 250 tons of ore mined. No wonder that a diamond ring weighing 1 carat is sold for tens of thousands of dollars in today’s jewelry market. High-quality emeralds are more expensive than diamonds of the same quality and size. Obviously scarcity is an important factor. În plus, as a mineral resource, gemstones are generally non-renewable. They can only be mined for less until they are exhausted, such as the abandoned diamond pits in South Africa. This is another factor that contributes to the scarcity of gems, and it is also an issue that should arouse people’s attention.

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