Corundum – From Sapphires to Rubies
Gemstones of the mineral corundum [Ref 1] offer a rainbow of colors for the lapidarist and jewelry maker as displayed in Figure 1. Traditionally, of these, the ruby and blue […]
Gemstones of the mineral corundum [Ref 1] offer a rainbow of colors for the lapidarist and jewelry maker as displayed in Figure 1. Traditionally, of these, the ruby and blue […]