Ruby

ID	577
Mineral	Ruby
Location	Zazafotsy Quarry (Amboarohy) - Zazafotsy - Ihosy - Madagascar
Fluorescence	LW-UV: check SW-UV: check
Mindat.org	View Ruby information at mindat.org

Mindat data

ID	3473
Long ID	1:1:3473:5
IMA Status	0 1
Variety of	1136
Entry type	2
Description	A red, gem variety of corundum. The red colour is caused by minor amounts of trivalent Cr replacing Al in the crystal structure. In traditional gemmological terms, ruby has to be blood-red and of clear, facetable quality to justify the name, however...
Colour	Red
Hardness (min)	9.0
Hardness (max)	9.0
Crystal System	Trigonal
UV	The intensity of fluorescence is a function of Cr concentration and the Cr/Fe ratio, because the presence of Fe or an excess of Cr tends to eliminate or quench the fluorescence in ruby.

Price: € 350

Dimensions: Not registered

Weight: Not registered

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Notes:

Symbol	Element
Al	Aluminium
O	Oxygen