Lightning Ridge Rough Rub Semi Black green fire 13.2crt -Eo-933
 
Piece of Lightning Ridge opal with a semi black base, section of exposed super bright green fire.  Will cut a stone the size of the colour in the pictures.
 
Mine - Lightning Ridge
Body Tone - N5
Brightness - 5/5
Fire colour - Green
Size - 27x12x8
Weight - 13.2 carat
 
About Opals
 
Lustre: Pearly, Vitreous, Opalescence
Birthstone zodiac sign: Libra
Associated month: October
Crystal system: Amorphous solid
Chemical formula: SiO₂·nH₂O
Hardness (Mohs hardness scale): 5.5 – 6.5
Country of origin: Australia, Ethiopia, Mexico and Cornwall amazingly 
Size variations: can vary 0.3mm each way on all dimension given
 
Properties:
 
In mystical circles, opal is considered a stone representing hope, innocence and purity. It has strong connotations of happiness, faithfulness, loyalty and confidence.  Regarded as a powerful sea stone for safety on the water.
 
All orders are sent recorded delivery UK and International.