Unique Lightning Ridge Black Opal

Posted on 13 July 2016 by admin



Opal | ?#?Geology
Formula: SiO2 ? nH2O
Colour: Colorless, white, various
Hardness: 5? – 6?
Lightning Ridge Black Opal it is like lightning bolts that flash and change as it moves. Australia. Photo by Wood’s Stoneworks and Photo Factory on Flickr
  
Types of opal with photos


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