Sterling Silver Gilson Opal Stud Post Ear Ring Set
Category: AMAZON FASHION
Store: BUTW
Average rating: 5 (1 ratings)
Features:
Opals are 4 mm diameter, on silver studs with backs

This type gemstones is created in controlled laboratory conditions. They have the same chemical composition and physical properties to that of the natural gemstones.  Unlike its natural counterpart, this created opal is much tougher and not prone to breaking. It gets it's hardness because it contains no water. Unlike natural opal which does contain water.