Citrine

Citrine

Citrine  Citrine is a transparent, yellow variety of Quartz, ranging in color from pale to golden yellow, honey or almost brown, and may contain rainbow or sparkle inclusions. The name comes from the French word citron, meaning lemon. Citrine is found in the Free...
Chalcedony

Chalcedony

Chalcedony Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Varieties of...
Carnelian

Carnelian

Carnelian Carnelian is a brownish-red mineral commonly used as a semi-precious gemstone. Similar to carnelian is sard, which is generally harder and darker. Both carnelian and sard are varieties of the silica mineral chalcedony colored by impurities of iron oxide....
Amethyst

Amethyst

Amethyst Amethyst is found at many localities in Southern Africa. It is a mauve to purple variety of quartz. Its colour is the result of Fe3 ions being found in its atomic lattice. In many cases the mineral has the distinctive habit of forming prisms that except for...
Beryl

Beryl

Beryl Beryl is a hard transparent and durable mineral. The main four varieties include aquamarine, heliodor, morganite and emerald. Beryl is found in South Africa, Zimbabwe, Namibia, and Swaziland. The colour spectrum ranges from Colorless to, green, blue, yellow,...