How much does a 90 carat ruby or diamond costs?

90 carat diamond or ruby value would be determined by the quality of the Gem. read more

90 carat diamond or ruby value would be determined by the quality of the Gem. In case of gem quality only person with deep pockets and auction can fetch the price , This page may be out of date. read more

So, a two carat diamond doesn’t cost twice what a one carat diamond costs, but markedly more. This has to do with being able to find rough diamonds of large size, and then the difficulty in cutting them. read more

For more information on ruby enhancements, see Corundum Treatments. CORUNDUM: Ruby, Thailand (2.22, 3.68, 3.35). Photo © Joel E. Arem, PhD, FGA. Used with permission. Sources. Although Asia has historically been the major producer of ruby gems, there are many other sources including the United States, Australia, and most recently Africa. read more