17.50 carat Lightning Ridge black opal Pear cut
 
Excellent large black opal from the lightning Ridge mine,  Medium dome cut pear.  Face show lovely sea blues and green that swirl around island of black.  Set as a super large ring stone or as a pendant.
 
Mine - Lightning Ridge
Body Tone - N3
Brightness - 4.5
Fire colour - Green Blue
Size - 28x18x5.8mm
Weight - 17.50
 
Price is for the stone pictured
 
About Opals
 
Treatment: Natural
Color: Black, White, Blue, Green, Red, Yellow, Pink, Grey, Purple, Orange, Brown
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 dimensions 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 safty on the water.
 
All orders are sent recorded delivery UK and International.