Hardness is one thing, In addition to numerous Other folks, which differentiates sapphires from other gemstones. It really is 2nd only to diamond and scores a 9 from 10 to the hardness scale. Do sapphires can be found in any other shade In addition to blue? You may establish some https://bookmarksoflife.com/story3464764/sri-lanka-yellow-sapphire-no-further-a-mystery