7.70 carat Mintabie black opal
 
Very rare Mintabie black opal, medium dome cut long oval.  Body has a range of different fire areas and patterns. One side has a red flash fire pattern in lines down the face and too the other side there is a bright multicoloured eye of fire.
 
Mine - Mintabie
Body Tone - N4
Brightness - 4/5
Fire colour - Mixed
Size - 20x10x5.3mm
Weight - 7.70 carats
 
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.