Corundum var. Ruby (

Corundum var. Ruby (23.10 carats, Burma) Diamond (2.38 carats) Donated by Dr. Peter Buck in 2004 in memory of Carmen Lúcia Buck. - Smithsonian Collection At 23.10 carats, the Carmen Lúcia Ruby is the largest faceted ruby in the National Gem Collection and one of the finest large, faceted Burmese rubies known. Smithsonian Collection