
1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone mineral 5) Gemstone 6) Jewel 7) Jewel mineral 8) Mineral jewel 9) Mineral gemstone 10) Polished jewel 11) Polished mineral 12) Precious gemstone 13) Prized mineral 14) Precious jewel 15) Precious gem 16) Prized stone 17) Precious stone
Found on
https://www.crosswordclues.com/clue/ettringite

Ettringite is a hydrous calcium aluminium sulfate mineral with formula: Ca6Al2(SO4)3(OH)12·26H2O. It is a colorless to yellow mineral crystallizing in the trigonal system. The prismatic crystals are typically colorless, turning white on partial dehydration. It is part of the ettringite-group which includes other sulfates such as thaumasite and be...
Found on
http://en.wikipedia.org/wiki/Ettringite

Ettringite is a mineral first found at Ettringen in Germany, and named after the place of its discovery. It is a hydrous sulphate of calcium and aluminium which forms small but beautifully formed hexagonal prism crystals, generally yellow in colour.
Found on
http://www.probertencyclopaedia.com/browse/HE.HTM
No exact match found.