Ruby 4mm Microfaceted Round A Grade - 15-16 Inch Dakota Stones ” Most deep red Carnelian

” 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

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

The name derives from “cuprum

blue or gray

Mica is a mineral name given to a group of minerals that are physically and chemically similar

Ruby 4mm Microfaceted Round A Grade - 15-16 Inch Dakota Stones ” Most deep red CarnelianRuby 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