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21.70 carat Allens Rise semi black opal


Large flat faced Allens Rise Opal with a mixed fire pattern. Harlequin to broad flash fire of green and blue with hints of orange.

Set as a pendant for best colour and pattern.


  • Mine - Allens Rise
  • Body Tone - N6
  • Brightness - 4.5
  • Fire colour - Green Blue Orange
  • Size - 28x18x5.7mm
  • Weight - 21.70 carats


Price is per stone


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 dimentions 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. 


21.70 carat Allens Rise semi black opal

SKU: Opl038
£1,999.00 Regular Price
£1,799.10Sale Price
Only 1 left in stock
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