Colored Sapphire (Fancy Colored Sapphire) belongs to the corundum stone, which is the hardest natural mineral on the earth except diamonds. The basic chemical composition is aluminum oxide, and its hardness is 9, second only to diamond. Because the colors are too rich, people feel like entering a dreamy fairy tale world. All corundum gemstones …
Sapphire is a precious gemstone in corundum minerals. They are usually known for their striking blue color, but there are many other colors. Sapphires have an incredible history, playing a role from royal fame to ancient legends. As a result, sapphire is one of the most popular gemstones in jewelry (as well as diamonds). This …
What is Ruby? Ruby is a red gemstone in the corundum family. Most rubies have an intense red color, although they range in color from blood red to orange, purple, brownish red, and even pink. Rubies are made of corundum, a crystalline form of aluminum oxide. Ruby’s red color comes from trace amounts of chromium, …