The ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Isolated in black background.
Keywords
corundum,
crystal,
gem,
gemstone,
geologic,
geologic,
geologist,
geology,
inorganic,
isolated,
macro,
mine,
mineral,
mineralogy,
precious,
red,
rock,
ruby,
sample,
science,
semi-precious,
silicate,
stone,
semitransparent