Lightning Ridge Opal Rub Piece 14.10 crts - OPL293
 
Dark base flat rub with some exposed green and blue fire.  Will cut into a few small stones.
 
Source - Lightning Ridge
Size - 24x18x7mm
Weight - 14.10 crts
Base Tone - N5
Fire Colour - Green Blue 
Brightness - 3.5/5 in rough form
 
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.