Solid dark crystal - 4.5cts

* Opal Type: solid dark crystal 
* Colours: Blue, Green, Orange
* Dimensions: 16.54 x 9.23 x 4.48mm
* Origin: Coober Pedy, SA, Australia
* Brightness: 7/10
* Cabochon: high dome
* Pattern: broad flash
* Shape: elongated oval