22 avril 2014
Bonhams in Los Angeles selling largest ruby crystal ever offered at auction in gems sale
Collection of 27 Rhodochrosites--"Red Gold" from the Kalahari. N'Chwaning 1 Mine, N'Chwaning 2 Mine, Hotzatel Mine, Wessels Mine, Black Rock Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Estimate US$ 200,000 - 250,000 ( €140,000...