5 Tips about Natural gemstone You Can Use Today
Ruby is the red variety of corundum, the 2nd toughest substance on the Mohs scale, with a rating of nine. It is The mixture of hardness and rich coloration that makes fine ruby so valuable.Hematite is iron oxide that is typically blackish-gray. When remarkably polished it can often appear like silver. Hematite is actually a remarkably dense content