![]() Semi precious stoneGem is generally divided into precious stones and Semi precious stone. Precious stones are mainly four kinds, namely diamonds, rubies, sapphires and emeralds, and the rest of the gem, like crystal, agate, chalcedony and other Semi precious stone. The main Semi precious stone are: tourmaline, crystal, lapis lazuli, topaz (topaz), sea blue treasure, garnet, olivine, tiger eyes stone (wood change stone), ramen stone (moonlight stone), star stone, Obsidian, malachite, turquoise, red stone, purple dragon crystal, Dongling jade, fluorite, agate, chalcedony, Czech meteorite, opal, Shu to stone, spodumene stone, calcite and so on. In addition, organic gemstones, amber, pearls, corals are also classified as Semi precious stone.Semi precious stone of many varieties, different Semi precious stone have different characteristics, identification methods, the value is also different. |