Hardness is another thing, Moreover quite a few Other folks, which differentiates sapphires from other gemstones. It is 2nd only to diamond and scores a 9 from 10 within the hardness scale. Do sapphires are available almost every other colour Apart from blue? The intensive yellow hue of the sapphire https://thebookmarknight.com/story17980654/a-secret-weapon-for-natural-yellow-sapphire-from-sri-lanka