1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone 5) Gemstone mineral 6) Jewel mineral 7) Jewel 8) Lithium mineral 9) Mineral jewel 10) Mineral gemstone 11) Polished mineral 12) Polished jewel 13) Precious gemstone 14) Precious gem 15) Precious jewel 16) Prized stone 17) Prized mineral
Found on
https://www.crosswordclues.com/clue/neptunite
Neptunite is a silicate mineral with the formula KNa2Li(Fe2+, Mn2+)2Ti2Si8O24. With increasing manganese it forms a series with mangan-neptunite. Watatsumiite is the variety with vanadium replacing the titanium in the formula. It was first described in 1893 for an occurrence in the Narssârssuk pegmatite of West Greenland. It is also found within ...
Found on
http://en.wikipedia.org/wiki/Neptunite
Neptunite is an accessory black-coloured mineral confirmed as a distinct species in 1893 and found in association with aegirine. Neptunite is a silicate of sodium, potassium, lithium, iron, manganese and titanium.
Found on
http://www.probertencyclopaedia.com/browse/HN.HTM
No exact match found.
