1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone 5) Gemstone mineral 6) Jewel 7) Jewel mineral 8) Mineral jewel 9) Mineral resembling feldspar 10) Mineral gemstone 11) Polished mineral 12) Polished jewel 13) Precious jewel 14) Prized mineral 15) Precious gem 16) Prized stone 17) Precious stone Found on https://www.crosswordclues.com/clue/wernerite
(from the article `scapolite`) ...meionite, a calcium aluminosilicate, are the theoretical end-members (pure compounds); they have been synthesized but occur in nature only with at ... Found on http://www.britannica.com/eb/a-z/w/23