These natural rubies fluoresce a gorgeous bright red under UV
Please see images for exact details of this listing.
Weight: 40g
From mindat.org :
Ruby is 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 in wider usage any corundum with a red or reddish colour has attracted the name 'ruby', and this name is usually applied in this way by mineral collectors.
