Lightning Ridge Rub Piece Opal 6.70 crts - OPL285
 
Crystal rub with exposed bright green and blue fire.  Suitable for cutting a couple of small stones or keep in collection.
 
Source - Lightning Ridge
Size - 16x15x5mm
Weight - 6.70 crts
Base Tone - Crystal
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.