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18.85 carat Mintabie crystal free form opal


This opal has a lovely sky blue crystal over the top of greens and oranges. Top example of Mintabie Opal. Hard to put this one down.


  • Mine - Mintabie - Australia
  • Body Tone - crystal
  • Brightness - 4/5
  • Fire colour - Blue Green
  • Size - 25x19x5.4mm
  • Weight - 18.85 carat


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. 


18.85 carat Mintabie crystal free form opal

SKU: Opl047
£8,999.00 Regular Price
£8,099.10Sale Price
Only 1 left in stock
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