Ruby 6mm Rondelle Faceted - 15-16 Inch Argenon Black Spinel not only has

Black Spinel not only has the dark color

inclusions of Goethite or Hematite refract the light between the layers of the crystal

with a Mohs Hardness of 8

displaying these colors in patterns of parallel bands

have been used for yellowish gemstones for at least two thousand years

Ruby 6mm Rondelle Faceted - 15-16 Inch Argenon Black Spinel not only hasRuby 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