spinelle
Noun
Meaning
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.
Source: Webster's dictionarySynonyms
ruby
garnet
jasper
sapphire
beryl
agate
amethyst
hyacinth
onyx
cubic
lazuli
heliotrope
carbuncle
rock
plasma
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