Found in articles
Aquamarine Diamond Emerald Jade Peridot Ruby Sapphire Topaz Turquoise Opal Spinel Alexandrite Bauer, Max (1968). Precious Stones: A Popular Account of Their
tourmalines, topazes, rubies, amethysts, sapphires, garnet, peridot, zircons, spinel, aquamarines, velvet, and ermine. At a coronation, the Archbishop of Canterbury
possibly coronet) of Edward the Confessor. The Black Prince's Ruby (actually a spinel) is set on the front cross pattée; the famous Cullinan II, or Lesser Star
Ringwoodite
to 660 km deep. Binns R.A. et al 1969. Ringwoodite, natural (Mg,Fe)2SiO4 Spinel group in the Tenham meteorite. Nature 221, 943-944. Ye Y. et al 2012. "Compressibility
List of minerals
Sillimanite Simetite Smectite Smoky quartz Sodalite Soda niter Sperrylite Spinel Spodumene Stannite Stantienite Staurolite Steacyite Stibnite Strontianite