258ct Rough Andamooka Rainbow Matrix Opal Chunk (51g, 1.8oz)

Description: 258ct Rough Andamooka Rainbow Matrix Opal Chunk (51g, 1.8oz) - Hefty Andamooka rainbow matrix opal (AKA Concrete) found in Andamooka South Australia. Rainbow Matrix is an affordable way to create great looking black opals, with the added protection of a glassy resin coating. Has been; sliced to show face of the stone, permanently darkened to N3/N4 with a single sugar carbon and heat treatment. - easier treatment method due to properties of this material. * Please refer to pictures and video for size and quality. - WYSIWYG Item pictures taken wet to better show the colour. Combined ShippingWe are happy to combine shipping, any issues drop us a message. - worst case we refund extra shipping paid. All items are sent via registered mail Australia Post with tracking number Packaging is of a high standard; items are wrapped, boxed, and put into a padded envelope. International buyers please note: Import duties, taxes and charges, if any, are the buyers responsibility. Finish a stone from rough in 3 steps:Shape and rub stone down to at least 2000 grit,Wash and then dry the stone thoroughly,Coat in a two part epoxy resin or a UV resin for a glassy finish. If cutting and shaping is deep then the material may require a further darkening treatment. - There are many resources online that show who to do this. - our methods are detailed below * * Treatment Process: Dissolve sugar into hot water at about 50/50 ratio,Place stones into sugar water mixture for 1 day, Take stone(s) out of sugar water mixture and dry naturally for 1 day,Place stone(s) individually in a double piece of tin foil (aluminium foil) and add spoon full of vegetable oil (any),Wrap the foil around the stone(s) - not too tightly,Place stone(s) in foil onto a BBQ - medium heat with closed lid for 1 hour,Turn off BBQ and leave it for 2 hours to cool. Clean the carbon off the face of the stone (with a CAB, Rotary, Sander) and Ta-Da! Coat of resin to seal and protect the stone and for additional lustreAfter cutting and polishing, a final coat of clear resin is applied which seals and protects the stone, and adds a glossy finish. A word on Stabilizing Fairy Matrix Opals can be stabilised if the rough stone is soft or crumbly. Can be stabilised if you are looking to polish a stone without a finishing coat of resin. - outcomes do vary and there are many resources that show how this is done.

Price: 135 AUD

Location: Sutherland

End Time: 2025-01-31T00:08:36.000Z

Shipping Cost: 12.97 AUD