Gems can be divided into organic gems and inorganic gems according to the source of raw materials.
Organic gems: pearls, corals, amber, ivory, hawksbill, armadillo, bodhi, variegated stones and other gems bred by life are collectively called organic gems.
Characteristics of organic gemstones: Organic gemstones are related to animals and plants, and generally refer to the products of natural biological crystalline minerals.
The main components of organic gemstones are: carbonate, phosphate, chitin, amino acids and so on. Low hardness: Mohs hardness is 2.5-4;
When wearing, it is easily eroded by cosmetics such as human sweat, perfume and nail polish. Be sure to keep away from cosmetics and some offensive items when wearing, and wipe them with a soft cloth in time. Maybe precious pearls will "disappear" in a hundred years.
Weighing 55.95 carats, this pearl is the largest and most symmetrical drop-shaped treasure in existence. 20 1 1, Christie's sold a rover pearl necklace with rubies and diamonds for 1 1.8 million dollars, making it the highest-priced pearl auction in history.
Inorganic gemstones Some lifeless gemstones, such as diamonds, emeralds, rubies, emeralds, golden green opals, tourmalines, emeralds, tanzanites, aquamarine, opals, turquoise, garnets and crystals, are collectively called inorganic gemstones.
Characteristics of inorganic gemstones: The minerals of inorganic gemstones are generally natural crystals with fixed chemical characteristics, so they have fixed physical and chemical properties, such as diamonds, rubies and emeralds. There are mineral combinations, such as jadeite and opal; These gems are all natural inorganic substances, and they are all called natural inorganic gems.
Myanmar natural jade bracelet, the inner diameter of the bracelet is 53.7 mm, the width is 13.8 mm, the thickness is 8.2 mm, the Hong Kong size is 1.45, and the Taiwan Province size is 17.3. This lot was sold for HK$ 40.44 million at the magnificent jade jewelry auction held on May 27th, 20 14.
Natural jade egg-shaped necklace, ring and earring set, set with diamonds and gold, the largest egg-shaped size is 17.8 x 15.2 x 7.2 mm, the length of the necklace is 37.0 cm, the ring size is 6, and the earring length is 2.4cm.. This lot was sold for HK$ 24.06 million at the magnificent jade jewelry auction held on 20 1 16129 October.
In 20 18, the highest transaction price of a piece of jewelry at Christie's was 18.95 carat pink diamond. This pink diamond is brightly colored, with a transaction price of US$ 50.4 million, US$ 2.7 million per carat, which set a new record for the unit price of carats auctioned in pink diamond. This pink diamond is named Winston Pink Legacy, and it is also the highest-priced gem in Christie's 20 18 auction.
The rare Kashmir sapphire with a gross weight of 109.8 carats was sold for nearly HK$ 65438+200 million, setting a new record for the auction of Kashmir sapphire.
There are still many kinds of gems, so it is of little significance not to do in-depth mineral research. Write some common sense of gems as a reference.