1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone mineral 5) Gemstone 6) Jewel mineral 7) Jewel 8) Mineral jewel 9) Mineral gemstone 10) Polished jewel 11) Polished mineral 12) Prized stone 13) Prized mineral 14) Precious stone 15) Precious jewel 16) Precious gemstone 17) Precious gem
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https://www.crosswordclues.com/clue/covellite
Covellite (also known as covelline) is a rare copper sulfide mineral with the formula CuS. This indigo blue mineral is ubiquitous in copper ores, it is found in limited abundance and is not an important ore of copper itself, although it is well known to mineral collectors. The mineral is associated with chalcocite in zones of secondary enrichment ...
Found on
http://en.wikipedia.org/wiki/Covellite
• (n.) A native sulphide of copper, occuring in masses of a dark blue color; -- hence called indigo copper.
Found on
http://thinkexist.com/dictionary/meaning/covellite/
a sulfide mineral that is a copper ore, cupric sulfide (CuS). It typically occurs as an alteration product of other copper sulfide minerals ...
Found on
http://www.britannica.com/eb/a-z/c/152
Covellite, named after its discoverer, Covelli, is an indigo-blue material found in most copper deposits, usually as a coating in the zone of sulphide enrichment. It has the formulae CuS and a relative hardness of 2.
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http://www.probertencyclopaedia.com/browse/HC.HTM
Copper(II) sulfide
Found on
http://www.translationdirectory.com/glossaries/glossary075.htm
Copper sulphide ore.
Found on
https://copperalliance.org.uk/about-copper/copper-glossary/
Copper sulphide ore.
Found on
https://oldcopper.org/special_topics/glossary.php
a mineral, copper sulfide, CuS, indigo in color and usually occurring as a massive coating on other copper minerals.
Found on
https://www.infoplease.com/dictionary/covellite
No exact match found.
