Australian Opal Cabochon Gemstone Collection 210 carats - Mintabie Mine
 
Stunning large collection of Mintabie mine opal that has been collected over the last 30 years.  Range of grades from top crystal to white.  Lots of rare shell fossil opal as well.  Sold as a package.
 
Parcel has being at an average of £125 a carat.  Most material is worth more than this with some being less.  (Material grades from £595 to £55 a carat)
 
Chance to get a collection that takes a lifetime to produce.  Mintabie mines are now closed to mining so no new material will ever come from this famous area again.
 
Pictures and video are taken in a range of lights and different cameras.  Professional image was produced in a series for Damien Hirst Science Ltd (main image)
 
Parcel can be seen by booking appointment
 
Source - Mintabie
Size - Mixed, see pictures
Weight - 210 carats
Base Tone - Crystal to white
Fire Colour - All colours 
Brightness - All ranges from 3 to 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.
 
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.