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then brought to the surface by volcanoes and earthquakes
It was popular with the Greeks and Romans
although the colors are much more muted
The combination of color and pattern variation are reminiscent of Red Creek Jasper
It has a hardness of 8 on the Mohs hardness scale
Ruby 4mm Microfaceted Round A Grade - 15-16 Inch Rhyolite then brought to the surfaceRuby 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