Ruby Gemstone. The Ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum named Aluminium Oxide. The red color is caused mainly by the presence of the element Chromium. It’s name comes from ruber, Latin for red. The ruby is considered one of the four precious stones together with the sapphire,
Topaz Gemstone. Topaz is a silicate mineral of Aluminium and Fluorine with the chemical formula of Al2SiO4. Pure topaz is colorless and transparent but it is usually tinted by impurities. Typical topaz is wine, yellow, pale gray, reddish-orange or blue brown. It can also be made white, pale green, blue, gold, pink , reddish-yellow or
Sapphire Gemstone. Sapphire, blue stone which probably referred instead at the time to lapis lazuli is a gemstone variety of the mineral Corundum, an Aluminium Oxide. Trace amounts of elements such as iron, titanium, chromium, copper or magnesium can give corundum respectively blue, yellow, purple, orange, or green color. The cost of natural sapphires
Emerald Gemstone. Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of Chromium and sometimes Vanadium. Beryl has a hardness of 7.5–8 on the Mohs-scale. Emeralds are highly costly. Emeralds are found all over the world in countries such as Afghanistan, Australia, Austria, Brazil, Bulgaria, Cambodia, Canada, China,
Alexandrite Gemstone. Alexandrite is a rare, remarkable and color change variety of the Chrysoberyl mineral along with it’s cousins yellowish transparent. Alexandrite was discovered by the Finnish mineralogist Nils Gustaf Nordenskiöld in honor of the future Tsar Alexander II of Russia. The alexandrite variety displays a color change dependent upon the nature of ambient lighting.