Hardness is one thing, Other than quite a few Other people, which differentiates sapphires from other gemstones. It really is second only to diamond and scores a 9 from ten around the hardness scale. Do sapphires come in every other colour Other than blue? Kunal Arora India it was a https://the-gem-journal.mystrikingly.com/blog/top-8-sites-to-buy-sri-lankan-pukhraj