• (n.) A mineral occuring in octahedrons of great hardness and various colors, as red, green, blue, brown, and black, the red variety being the gem spinel ruby. It consist essentially of alumina and magnesia, but commonly contains iron and sometimes also chromium.
Found on
http://thinkexist.com/dictionary/meaning/spinelle/
<chemical> A mineral occuring in octahedrons of great hardness and various colours, as red, green, blue, brown, and black, the red variety being the gem spinel ruby. It consist essentially of alumina and magnesia, but commonly contains iron and sometimes also chromium. ... The spinel group includes spinel proper, also magnetite, chromite, fra...
Found on
http://www.encyclo.co.uk/local/20973
No exact match found.
