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

Bayldonite (BAIL-done-ite) is a rare secondary mineral with the chemical formula PbCu3(AsO4)2(OH)2. It was first discovered in Penberthy Croft Mine, Cornwall, England, United Kingdom. It is named after its discoverer, John Bayldon (1837(8) – 1872). ...
Found on
http://en.wikipedia.org/wiki/Bayldonite

Bayldonite is a secondary mineral formed in the oxidation zones of copper ore-bearing veins. It is usually found as a green or yellow coloured encrustation on the surface of other minerals and rocks. Bayldonite is named after the physician John Bayldon who first discovered it in a mine in Cornwall, England. Bayldonite was first classified as a mine...
Found on
http://www.probertencyclopaedia.com/browse/HB.HTM
No exact match found.