https://diigo.com/0yfsn8
https://randolph-kearns-2.hubs....tack.net/certified-b
Sapphires are the most valuable and rarest blue colored natural gemstones. Their beautiful royal color, hardness and durability are all reasons why they're so sought-after. The gem industry uses the term sapphire to refer to the mineral Corundum's blue variety. does not include Ruby, a red variety, but it does encompass all other gem varieties, colors and sizes of Corundum. Sapphire corundum made in a laboratory is a synthetically-produced crystal whose hardness is second only after diam
Like
Comment
Share
