Topaz oval Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. It is used as a gemstone in jewelry and other adornments. Topaz in its natural state is a golden brown to yellow. A variety of...
Citrine oval Citrine is a variety of quartz whose color ranges from a pale yellow to brown due to ferric impurities. Natural citrines are rare; most commercial citrines are heat-treated...
Aquamarine oval Aquamarine (from Latin: aqua marina, "sea water") is a blue or cyan variety of beryl. It occurs at most localities which yield ordinary beryl. The gem-gravel placer deposits...
Amethyst oval Amethyst is a violet variety of quartz. The name comes from the Koine Greek "intoxicate", a reference to the belief that the stone protected its owner from drunkenness....
