admin gems gemology Gems Formed in Metamorphic Rocks Figure 1. The concept of the rock cycle demonstrates the interplay ... أغسطس 25, 2023 Read More
admin gems gemology Rainbow Mountain in Natural Diamond These iridescence features observed in a 1.71 ct natural diamond (top) ... أغسطس 25, 2023 Read More
admin gems gemology CVD Diamond Over 34 Carats Figure 1. This 34.59 ct CVD-grown diamond (24.94 × 13.95 × ... أغسطس 25, 2023 Read More
admin gems gemology Characteristics of Treated Rubies from Greenland Rubies and pink sapphire from Greenland are a new addition to ... أغسطس 25, 2023 Read More