Fine Jewels
拍品 1742:
Set with a cushion-cut spinel weighing 5.89 carats, accentuated by channel-set diamonds to the three-quarter hoop, mounted in platinum, ring size 5½
Accompanied by a report from the GemResearch Swisslab, stating that the 5.89 carat natural spinel is pink color and has no indication of thermal treatment, report no.
GRS2014-079075, dated 29th July 2014
Spinel is one of few colored gemstones with a wide range of colors that are entirely natural. They require no special treatment and are nearly free of visible inclusions. Additionally, spinel exhibits fluorescence when exposed to UV light. The presence of UV light can cause its inner material to literally glow like neon, as in the case of electric-blue Paraíba tourmalines
