Posted on

Opal Fossils

Opal fossils are opals formed in the cavity left underground by an animal that has perished and left the shape of its former self to be filled by silica spheres over many years. The rain that falls on the ground seeps into the ground taking thousands of years, carries the rich silica spheres through the cavities, cracks and fissures underground until it has nowhere else to go and fill the cavity to form opal. There are many different explanations for how it is formed, some say it is formed by bacteria, some say the clay balls underground get washed around by water and slowly ground away leaving cavities for the…

Read More
Posted on

Crystal Opals

Crystal opals are found in almost every area where gem colored opal is formed. Lightning Ridge has produced some of the best crystal opal I have ever seen, with Coober Pedy a close second. Australian opal mining fields are one of the most prevalent in gem Crystal opal. Top quality crystal opal from Lighting Ridge comes in the form of nobby opal, while the gem quality that comes from Coober Pedy is formed in Seam opal. It is unexplained why only Lighting Ridge is the only place that nobby opal occurs. Brazilian Opal is now becoming more popular with some very nice gem opal popping up in markets all around…

Read More
Posted on

White Opals

White opal is a more common opal and was heavily marketed in the early days of opal trading, That’s why when you think of opal, you think of a white opal. White opal has a very light body tone to it giving the opal a white look and appearance. White opal can come in all different colors from blue, green, orange, red etc…  The most expensive color is red but that doesn’t mean that it is worth more than a blue. It depends on its brightness. White opal is a lower quality opal to black opal and crystal opal, and even some grey opal. Most white opal is found in…

Read More