
1) Cubic mineral
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https://www.crosswordclues.com/clue/coloradoite

Coloradoite, also known as mercury telluride (HgTe), is a rare telluride ore associated with metallic deposit (especially gold and silver). Gold usually occurs within tellurides (e.g. Coloradoite) as a high finess native-metal (Fadda et al., 2005). The quest for mining led to the discovery of telluride ores which were found to be associated with m...
Found on
http://en.wikipedia.org/wiki/Coloradoite

• (n.) Mercury telluride, an iron-black metallic mineral, found in Colorado.
Found on
http://thinkexist.com/dictionary/meaning/coloradoite/
Col`o·ra'do·ite noun (Min.) Mercury telluride, an iron-black metallic mineral, found in Colorado.
Found on
http://www.encyclo.co.uk/webster/C/111

Coloradoite is mercury telluride, an iron-black metallic mineral, found in Colorado.
Found on
http://www.probertencyclopaedia.com/browse/HC.HTM

a mineral, mercury telluride, HgTe, occurring in the form of grayish-black masses.
Found on
https://www.infoplease.com/dictionary/coloradoite
No exact match found.