250.4 Carat Collectors Opal, Rub 60x58x14mm
 
Stunning large collectors opal, this rub has had the face exposed to show huge blocks of green and blue colour.  
The back has been left for the buyer to decided to either cut into smaller stones or keep as a centerpiece in a collection.
 
Mine - Lightning Ridge 
Body Tone - N5
Brightness - 4/5
Fire colour - Green Blue
Size - 60x58x12mm
Weight - 250.40 carats
 
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.
 
Properties:
 
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.