Opals are created from silicon dioxide solutions, which entered cracks in ancient rocks during the Cretaceous geological period.

Opal is a birthstone for Libra , Taurus  and the months of October, September and November...

Opals are said to encourage stable relationships and companionship.

Left  Ring weighs 4.5 grams , stone size 9mm  x 12mm

Centre Ring weighs 5.2 grams, stone size 12mm x 8 mm

Right Ring weighs 6.7 grams , stone size 15mm x 9mm