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17.50 carat Lightning Ridge Rough Opal - EO-250


Large flat piece of Lighting Ridge opal with a good red, blue and green fire bar through the body. Ready to cut a large stone


  • Source - Lightning Ridge
  • Size - 25x22x4.5mm
  • Weight - 17.50 crts
  • Base Tone - N7
  • Fire Colour - Red Blue Green
  • Brightness - 4/5


Price is for the stone pictured


About Opals from around the world - 


Treatment: Natural

Colours Opal Can Be: 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. 


17.50 carat Lightning Ridge Rough Opal - EO-250

SKU: EO-250
£1,400.00 Regular Price
£1,260.00Sale Price
Only 1 left in stock
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