9.25 carat Lightning Ridge doublet oval - top grade with thick layer of crystal on top n1 black opal
 
Beautiful large oval cut doublet opal from the Lightning Ridge mines, rich blue and green fire cut 18x15mm oval
 
Mine - Lightning Ridge doublet
Body Tone - N1 crystal top
Brightness - 5/5
Fire colour - Blue Green
Size - 18x15x5mm
Weight - 9.25 carat
 
Price is per stone
 
About Opals
 
Treatment: Doublet
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 dimentions 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.