GEOLOGICAL GROUP OF CUT SPINEL 'BLACK DIAMONDS' A group of six brilliant-cut black spinels, largest 3.0 carats. 17.55 carats total, 7.83-9.59 mm (5/16" - 3/8"). Very fine condition. Good standard of cutting. [No Reserve] Literature See Bonewitz, R, Smithsonian Guide to Gemstones. Footnotes Spinel is an oxide mineral, general formula (Mg,Fe)(Al,Cr)2O4, black spinel tending to opaque and iron-rich, sometimes sold as 'black diamond'. VAT is payable at 20% on Hammer Price and buyer's premium on this lot.
GEOLOGICAL GROUP OF CUT SPINEL 'BLACK DIAMONDS' A group of six brilliant-cut black spinels, largest 3.0 carats. 17.55 carats total, 7.83-9.59 mm (5/16" - 3/8"). Very fine condition. Good standard of cutting. [No Reserve] Literature See Bonewitz, R, Smithsonian Guide to Gemstones. Footnotes Spinel is an oxide mineral, general formula (Mg,Fe)(Al,Cr)2O4, black spinel tending to opaque and iron-rich, sometimes sold as 'black diamond'. VAT is payable at 20% on Hammer Price and buyer's premium on this lot.
.jpg "Source: Timeline Auctions")
.jpg "Source: Timeline Auctions")
Try LotSearch and its premium features for 7 days - without any costs!
Be notified automatically about new items in upcoming auctions.
Create an alert.jpg "Source: Timeline Auctions")
.jpg "Source: Christie's")
.jpg "Source: Christie's")
.jpg "Source: Christie's")
.jpg "Source: Christie's")
