3.50 carat Lightning Ridge semi black opal Green blue fire
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3.50 carat Lightning Ridge semi black opal Green blue fire, free form triangle with a low dome.
 
Mine - L/R - - Australia
Body Tone - N5
Brightness - 4.5/5
Fire colour - Green and Blue
Size - 17x10x3.5mm
Weight - 3.50 carats
 
About Opals
 
Luster: 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.