Vintage 9ct Yellow Gold Queensland Koroit Boulder Opal Ring
A large example she measures approximately 3.3cm x 1.1cm x 6mm and creates such a presence on the finger with not only her finger coverage but her stunning and intricate patterns and colours.
Crafted from 9ct yellow gold throughout the Opal is bezel set, open backed where her colours and pattern can also be seen, to bifurcated flat shoulders and a wide flat shank.
Desirable to say the least this unique ring is a collectors dream.
HISTORY OF KOROIT OPAL FIELD
The Koroit Opal field was discovered in 1897 by Lawrence Rostron, the manager of Tillboroo Sation, Eulo.
Mining continued for a number of years mostly by syndicates until by 1905, digging approximately 150 shafts up to 15 metres deep and 472 metres of drives, finding 300 ounces of medium and 30 ounces of extra fine gem grade Opal with another one and a quarter tons of gem grade matrix.
Koroit Opal field become dormant shortly afterwards, competing with an oversupply of Opal from Whitecliffs (NSW). Some mining resumed in 1927 until the outbreak of the second World War, where Australian Diggers were once again called to arms in service to their nation.
More recent mining events started again in 1972 when the popularity and profitability of the gemstone increased.
Mining in Koroit today done by either open cut large scale mining or some still prefer to underground mine, albeit a little easier utilising electric lighting, jack hammers, diggers, boggers and mechanical hoists.
Koroit Opal today competes with no gem, it is a stand alone brand of its own with the Koroit field and its unique characters supplying magnificent Opal to opal connoisseurs around the globe.
Credit - https://www.qoma.org.au/what-is-boulder-opal.htm
STONES
Koroit Opal - Pronounced ‘Kuh - Royt’
1 @ approximately 3.3cm x 1.1cm x 6mm deep
MEASUREMENTS
3.4xm x 1.2cm
Rise - At highest point 7mm
4.0mm wide shank
WEIGHT
7.2 Grams
MARKS
375 For 9ct
SIZE
N 1/2 or 17.3mm diameter US 7
Can be resized
CONDITION
Very very good preowned condition. No chips or scratches nor damage to Opal. No thinning to shank. Minor marks to gold only.
Please note boxes are for display only unless otherwise stated.
Laybys & Hold Policy
Do you have your eye on a fabulous piece but need some extra time to
pay? At Graisons, we offer suitable layby terms for pieces priced $400 AUD and above. Contact us for more details.
Purchase Guide & Refund Policy
For information regarding our Purchase Guide & Returns Policy, please click here
Shipping & Delivery
Free Complimentary Express Shipping: Australia & Select International Countries.
We are pleased to offer free complimentary express postage, fully insured with tracking and signature on delivery using Australia Post.
For all international purchases, a third party postal company will complete the final stage of delivery.
Orders are dispatched within one-two business days of purchase. Once complete, a tracking number will be forwarded to you via email notification.
We are currently shipping to the following international countries:
UK, USA, CANADA, SINGAPORE, NEW ZEALAND, HONG KONG.
PLEASE NOTE: Any duties imposed by countries for importing our items are the buyers responsibility. Please contact your local customs agency if you wish to discuss potential rates and fees.
Caring For Antique & Vintage Jewellery
We absolutely pride ourselves on sourcing the best quality pieces for our customers, with many of our items valued by our registered jeweller/gemologist.
Our collection consists of pieces that are of antique and vintage condition, which means that all our items are secondhand and used. Customers are not purchasing 'new', 'perfect' and 'unworn items', and as such, should expect wear and imperfection. Any condition issues are always extensively mentioned in the condition summary.
Please do not hesitate to ask questions prior to purchase. It is the responsibility of the purchaser to ensure that these descriptions and pictures are carefully viewed and any questions are asked prior to the transaction taking place.
Please refer to our guide, Caring For Antique & Vintage Jewellery for more details.
Your Purchase: What Is Included?
Your purchase will be lovingly packaged in our custom made, eco-friendly Graisons Fine Jewellery Jewel box tied with ribbon inside our custom made packaging/mailing box.
For added safety and security, all purchases are shipped inside an Australia Post medium sized mailing box.
If your item includes an independent valuation, the physical certificate will be included.
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