Gemstones or Precious stones

Gemstones or precious stones are a group of one type of ore means ore or rock of some kind. Organic or natural objects that are cut or carved decoration to the jewelry has beauty, durability and rarity, usually divided into two groups, namely, diamonds and gemstones, which means all kinds of gems except Diamonds. If a decoration or uncut gems are called compound derived from living things may be classified as precious stones including pearls and coral, and amber.       Precious or precious stones A crystal that has a clean interior. It looks different to the hardness possible to cut a corner. To see the diffuse light, glittering mineral inclusions in minerals made with different colors, pure corundum. White aluminum oxide is a substance that, if such a stigma chromium alloys made of titanium steel, make the ruby ​​red color. (Ruby and Sapphire Corundum is identical But with different meats).      Criteria for judging gems include hardness (the Moh's scale), the specific gravity. And the index of refraction      Index of refraction A fixed value of each type of gem. Therefore decided that it's fake or not. The hardness of the mineral is affecting the price of the gemstone are tested by scratching each other (e.g. A copper coin knife, nail file, hand, makeup tests), the mineral is scratched, which is lighter than testing. Which can be classified as follows gemstones Chartres 9.    1. Diamond refers to a diamond white gem (Diamond).    2. Jewell red means red ruby ​​gemstones (Ruby).    3. Emerald green light means a green emerald gemstone (Emerald).    4 fresh, clear, yellow topaz, topaz gemstones refers to yellow. (Sapphire Blue) 5. Vivid red garnet garnet gemstones mean crimson (Garnet). 6. Colored clouds mean black jasper gemstones, sapphire blue (sapphire) (Sapphire Blue). 7. Mukdahan haze means Juntrakarn gemstones rubies or opaque color coding is similar.     Rainbow effect with soft color is blue (Moonstone). 8. Dim red zircon zircon gemstones mean dark red (Hyacinth) wrote that one.     (Yellow Zircon) (which is the same kind of precious Chartres). 9. Installed chrysoberyl chrysoberyl refers to a type of gems or stones or gems there.     Many colors such as yellow, yellow, gold, green apple, honey, brown sugar, etc..     (Chrysoberyl-cat eye)