10.10 carat Lightning Ridge semi black Red fire opal​​​​​​
 
Good size free form semi black opal from the Lightning Ridge mines. Flat face showing good red multioclour fire pattern, some good blocks of red fire. Suit pendant setting
 
Mine -  Lightning Ridge - Australia
Body Tone - N5
Brightness - 4
Fire colour - Red multicolour
Size - 20x17x4.6mm
Weight - 10.10 carat
 
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.