Also known as "Opalite," these man-made glass beads are made at very high temperatures & pressure and have an amazing opalescence with a slight blue tint and translucent to semi-opaque appearance. Opal as a natural stone has many colors and varieties and is the most known photonic crystal. It is formed as a result of water activity in the Earth's crust. It is the most precious and most expensive stone among semi precious stones, which is why synthetic opals are commonly used in handmade jewelry making.
Our Semi Precious Stones are genuine and natural unless they are stated to be synthetic in the description. However, you will find the vast majority of Semi Precious Stones are treated in some way, as they would not be stable enough for use in jewellery in their original state. For further information on each product, click on the product to view the description.