Emerald are a type of gemstone that belong to the beryl family, which has the chemical formula Be3Al2(SiO3)6. They are valued for their intense...

Ruby is a gemstone and a variety of the mineral corundum (Al2O3) that is distinguished by its red color, which is caused by trace...

Sapphire is a precious gemstone that is a variety of the mineral corundum, which is composed of aluminum oxide. It is typically blue in...

A pearl is a hard, shiny object produced in living tissue such as a crustacean mollusk or fossil conulariids. It is generally composed of calcium carbonate and mainly aragonite.

Beryl is a member of cyclosilicate minerals with composed of beryllium aluminium. Chemical formula: Be3Al2Si6O18. Few people have ever heard of the mineral beryl but almost everyone has heard of its principal gemstone varieties emerald and aquamarine.

Corundum is a mineral that is primarily composed of aluminum oxide (Al2O3) and is one of the naturally occurring crystalline forms of aluminum oxide....

The hardest known mineral, diamond is pure carbon. Its crystals typically occur as octahedrons and cubes with rounded edges and slightly convex faces. Crystals may be transparent, translucent, or opaque. They range from colorless to black, with brown and yellow being the most common colors. Other forms include bort or boart (irregular or granular black diamond) and carbonado (microcrystalline masses).

Garnet, any member of a group of not unusual silicate minerals that have comparable crystal structures and chemical compositions. They may be colourless, black, and lots of sun shades of red and inexperienced.