Encyclopedia gem (ore used for precious jewelry) refers to a stone or mineral inlay that can meet the requirements of jewelry after grinding and polishing. Gem (also called gem) is the most beautiful and valuable stone among rocks. They are bright in color, crystal in texture, bright in luster, hard and durable. Scarcity can be used to make jewelry. Such as diamonds, crystals, emeralds, rubies, sapphires and emeralds (metamorphic rocks, cat's eyes); A few are natural single mineral polymers, such as chalcedony and opal. There are also a small amount of organic materials, such as pearls, corals, coal fines and ivory, which are also included in shiny gems. Jade is also the beauty of precious stones. But it also has bright colors, hard and delicate texture, and beautiful luster after polishing. Why are gems colorful? Gems have always been regarded as colorful and radiant. After chemical analysis and spectral identification, it was found that the gem was originally a metal. Different gems have more or less metal elements, some have only one metal element, while others contain several metal elements. The color of some gems is related to their atomic arrangement. The blue color of lapis lazuli and the yellow-green color of garnet are determined by the atomic distribution in its crystal. There are also some beautiful gems, which are artificially dyed and colorful. There are gems on the birthstone to represent every month from 1 to 12. The gem representing the month of your birth is your birthstone. According to legend, having the birthstone can eliminate and alleviate disasters. 65438+ October (garnet), February (purple in season), March (aquamarine), April (diamond), May (grandmother), June (pearl), August (ruby), September (sapphire), 65438+ October (opal), 65438.