Blue Opal 4mm Microfaceted Round - 15-16 Inch R1573 but also for industrial purposes

but also for industrial purposes from watch gears and scientific instruments to sandpaper and other abrasives

sometimes containing rainbow inclusions

or x-ray analysis

with bands of white Onyx running through it

consisting of opaque rust-red glass with tiny flecks of glittering copper suspended within it

Blue Opal 4mm Microfaceted Round - 15-16 Inch R1573 but also for industrial purposesBlue Peruvian Opal naturally occurs with swirling patterns of deep blues, blue to greens and greens swirled with yellow to green, rust, brown and orange. It is highly prized for its beautiful combinations of colors and for its opalescence the pearly luster of the opaque stone. Peruvian Opal was considered by the Incas to be a gift from Pachamama, the Inca Goddess of Fruitfulness and Mother Earth.