Ruby 4mm Microfaceted Round A Grade - 15-16 Inch Dakota Stones It is best known for

It is best known for its characteristic deep blue to violet-blue color

” Most deep red Carnelian has been heat treated to darken the beautiful orange and red tints that are created by iron oxides in the stone

The name derives from “cuprum

Lepidocrosite

It has a hardness of 8 on the Mohs hardness scale

Ruby 4mm Microfaceted Round A Grade - 15-16 Inch Dakota Stones It is best known forRuby is a precious gemstone known for its deep red color. It is a variety of the mineral corundum, the second hardest mineral next to diamond . The presence of chromium is what gives a ruby its red color. Trace amounts of iron can also affect the hue, giving some rubies a slightly brownish or purplish tint. Ruby has long been considered one of the most beautiful and valuable gemstones on the planet. At times in ancient history, Ruby was valued more