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12.80 carat Allens Rise semi black opal Marquise cut


Large Marquise cut Opal from the Allen Rise mine in south Australia. Rare to get a marquise cut especially in this size.  Body colour if full of blues and greens.  Will make a lovely pendant.


  • Mine - Allens Rise
  • Body Tone - N5
  • Brightness - 4
  • Fire colour - Green Blue Orange
  • Size - 34x14x4mm
  • Weight - 12.80


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.




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. 


12.80 carat Allens Rise semi black opal Marquise cut

SKU: Opl103
£999.00 Regular Price
£899.10Sale Price
Only 1 left in stock
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