Boulder opal is similar to black opal except that the foreground colour is very thin and sits on a brown ironstone base.
Types of opal rings.
These types of opal can come with interesting hills and valleys on the surface.
Solid opal can be a combination of precious opal and common opal.
Most of this type of opal comes from the opal fields in queensland where there is a huge belt that spreads thousands of kilometers where this type of opal is produced.
Solid opal is also known as type 1 opal.
Walnut sized concretions in a regular layer like a conglomerate.
Boulder opal is opal that has formed along with another rock called ironstone.
In this video justin will take you through the four main australian opal types as well as a newly discovered one not yet gone mainstream.
Australia produces various types of opals.
Solid opal type 1 opal solid opal is a name used for a rough or cut stone that consists entirely of opal material without any host rock or other significant inclusions contained within the stone.
Thin to thick seams of white or black.
Boulder opal presents beautifully in jewelry of all types including men s jewelry.
This is because black opal amplifies the colors with the contrasting dark background.
Understanding opal starts with understanding the basic types of opal found.
The material is cut and polished with the opal material still attached to the parent material e g.
Black opal is the most valuable type of opal and it is predominantly found in lightning ridge.
When the parent stone is visible alongside the opal as in the pendant shown here it is called boulder matrix opal.
Shells of coarse hardened sandy clay with layers of opal in between.
Ironstone on which the opal formed.
Types of australian opal.