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4.75 carat Andamooka black Opal


Old stock Andamooka black opal, this is the real deal of the acid and sugar treated opal from that region.

Stunning green, blue and orange fire and a fraction of the cost if you wanted to match a Lightning Ridge black opal.  One set its hard to tell the difference.


  • Mine - Andamooka
  • Body Tone - N1 acid and sugar treated
  • Brightness - 5
  • Fire colour - Green Blue Orange
  • Size - 22x13x2.2mm
  • Weight - 4.75 carats


Price is for the stone pictured


About Opals


Treatment: Acid and sugar

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.




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. 


4.75 carat Andamooka black Opal

SKU: Opl094
£795.00 Regular Price
£715.50Sale Price
Only 1 left in stock
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