Ruby 4mm Microfaceted Round A Grade - 15-16 Inch Agate12mm These form as a criss

These form as a criss cross banding called lamellae

Diamonds actually form at high temperatures and pressures that occur in Earth's mantle about 100 miles below Earth's surface

Goldstone was first created during the Italian Renaissance when

Each strand reflects the unique mineral composition of the region

siderophyllite

Ruby 4mm Microfaceted Round A Grade - 15-16 Inch Agate12mm These form as a crissRuby 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