Lightning Ridge Rough Dark Base Opal 11.70crts - EO-247
 
Lightning Ridge rough piece of opal with a red, green and blue bar fire pattern showing through the top skin layer.  The bars are seen from the side so will cut a very unique looking pattern gem.
 
Source - Lightning Ridge
Size - 23x16x7mm
Weight - 11.70 crts
Base Tone - N6
Fire Colour - Red Blue Green
Brightness - 4/5
 
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.