RUBY, king of precious gemstones. Natural, u... RUBY, king of precious gemstones. Natural, untreated, of breathtaking beauty and very limited. In this way, Myanmar rubies grow in marble (contact metamorphic rock) know as the parent rock. Among rubies, natural, untreated and beautiful crystals are very few. Rubies of the highest quality are represented in the blue section in the above quality scale. The gray section is sufficiently beautiful and these are often used in jewelry. The yellow frame represents a quality that would be used in accessory jewelry. Looking at the loose gemstones on the quality scale... As mentioned above, the number of rough stones that will become the highest quality entering the blue frame is only a few. Most rubies do not enter this frame. The definition of gemstone is; 1) beautiful 2) rare 3)doesn't change. The untouched and beautiful rubies of Myanmar is exactly the definition of gemstone itself. Takahito Moriさん(@morisruby)がシェアした投稿 - 2017 Mar 11 4:25pm PST