Sapphire is a precious gemstone that is a variety of the mineral corundum, which is composed of aluminum oxide. It is typically blue in color, but can also be found […]
Spinel is a mineral that belongs to the group of oxides and forms in various colors, making it a popular gemstone. Its chemical composition is magnesium aluminum oxide (MgAl2O4). Spinel […]
Kyanite is a mineral composed of aluminum silicate, and it belongs to the family of aluminosilicate minerals. Its chemical formula is Al2SiO5. Kyanite typically forms bladed crystals, and its name […]
Rutile is a mineral composed primarily of titanium dioxide (TiO2). It is one of the three main minerals of titanium, along with ilmenite and leucoxene. Rutile is commonly found in […]
Ruby is a gemstone and a variety of the mineral corundum (Al2O3) that is distinguished by its red color, which is caused by trace amounts of chromium in the crystal […]
Tourmaline is a fascinating gemstone that is known for its wide range of colors and unique properties. It is a crystalline mineral composed of complex borosilicate compounds and belongs to […]