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12000 CTS AUSTRLIAN EMERALD UNTREATED SPECIMEN TBM-2284 trueblueminera
- SKU
- TBM-2284
- Dimensioni (mm)
- 230.000 x 110.000 x 80.000mm
- Peso (cts)
- 12000.000
- Treatment
- No Treatment
- Clarity
- N/A
- Tipo
- Specimen
- Shape
- Emerald
- Colori
-
AUSTRALIAN EMERALD
Curlew Emerald Mine, Shaw River District, East Pilbara Shire, Western Australia, Australia
STUNNING SPECIMEN
TREATMENT -NONE
COLLECTOR PC
GREEN-CRYSTAL
ON HOST ROCK
Specimens can consist Light green beryl crystals to green beryl coloration, with minor dark biotite specks mica ,schist and purple fluorite inclusions.
The dark mica schists within the quartz veins and pegmatites contain gem quality emerald crystals and green beryl. As is typical of Western Australian emerald
Beryl Be3Al2(Si6O18) , Biotite K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 , Quartz SiO2
Curlew Emerald Mine, Shaw River District, East Pilbara Shire, Western Australia, Australia
Nearly all production of emerald in Western Australia has been from a deposit at Poona but there are beryl and emerald deposits at Menzies and in the Pilbara region, south of Port Hedland.
Emeralds have been commercially mined in Australia in three main deposits Poona and Menzies in Western Australia, and Emmaville in New South Wales. The emeralds are usually in rocks among layers of other minerals such as mica. Open pit mining or terrace mining are the most common methods. discovered in Western Australia in 1912 at Poona, 500 km north-east of Perth. The main mine of the district was the Aga Khan which operated on and off for more than 70 years until 1980 and yielded an estimated 10,000 grams of mostly low value emerald. During the1980s another mine in WA was worked some 40kms west of Menzies.
In Australia, emerald is associated with granite pegmatites and metamorphosed rocks called schists. It is also sometimes associated with altered limestones or can be found embedded in calcite or quartz. A pegmatite forms when a magma cools, leaving some elements behind in the remaining fluid. Emerald crystals may grow when the remaining solution cools as long as the necessary elements are present, including beryllium. Emeralds can also form in veins in the crust from hot liquids that escape from a deeper magma.
Processing
Screens are used to sort the emeralds by size and then silt and clays are washed away to expose the emerald-bearing schist. No other chemicals are used in this process. Any schist or other rock still attached to the emerald is removed manually in a process called cobbing. Higher quality materials can be cleaned using high-pressure air.
Mining
Emeralds have been commercially mined in Australia in three main deposits Poona and Menzies in Western Australia, and Emmaville in New South Wales. The emeralds are usually in rocks among layers of other minerals such as mica. Open pit mining or terrace mining are the most common methods. Miners dig a pit with shovels, excavators or other earth moving equipment, depending on the scale of the mine. If the emerald-bearing ore is beneath a substantial cover of soil and rock, explosives might be used to remove this material. Sometimes high pressure water is used to blast the rock to reveal mineral bearing rocks. Tunnels are also used to extract emeralds from deeper rock layers.
- SKU
- TBM-2284
- Dimensioni (mm)
- 230.000 x 110.000 x 80.000 mm
- Peso (cts)
- 12000.000
- Treatment
- No Treatment
- Clarity
- N/A
- Tipo
- Specimen
- Shape
- Emerald
- Colori
-
AUSTRALIAN EMERALD
Curlew Emerald Mine, Shaw River District, East Pilbara Shire, Western Australia, Australia
STUNNING SPECIMEN
TREATMENT -NONE
COLLECTOR PC
GREEN-CRYSTAL
ON HOST ROCK
Specimens can consist Light green beryl crystals to green beryl coloration, with minor dark biotite specks mica ,schist and purple fluorite inclusions.
The dark mica schists within the quartz veins and pegmatites contain gem quality emerald crystals and green beryl. As is typical of Western Australian emerald
Beryl Be3Al2(Si6O18) , Biotite K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 , Quartz SiO2
Curlew Emerald Mine, Shaw River District, East Pilbara Shire, Western Australia, Australia
Nearly all production of emerald in Western Australia has been from a deposit at Poona but there are beryl and emerald deposits at Menzies and in the Pilbara region, south of Port Hedland.
Emeralds have been commercially mined in Australia in three main deposits Poona and Menzies in Western Australia, and Emmaville in New South Wales. The emeralds are usually in rocks among layers of other minerals such as mica. Open pit mining or terrace mining are the most common methods. discovered in Western Australia in 1912 at Poona, 500 km north-east of Perth. The main mine of the district was the Aga Khan which operated on and off for more than 70 years until 1980 and yielded an estimated 10,000 grams of mostly low value emerald. During the1980s another mine in WA was worked some 40kms west of Menzies.
In Australia, emerald is associated with granite pegmatites and metamorphosed rocks called schists. It is also sometimes associated with altered limestones or can be found embedded in calcite or quartz. A pegmatite forms when a magma cools, leaving some elements behind in the remaining fluid. Emerald crystals may grow when the remaining solution cools as long as the necessary elements are present, including beryllium. Emeralds can also form in veins in the crust from hot liquids that escape from a deeper magma.
Processing
Screens are used to sort the emeralds by size and then silt and clays are washed away to expose the emerald-bearing schist. No other chemicals are used in this process. Any schist or other rock still attached to the emerald is removed manually in a process called cobbing. Higher quality materials can be cleaned using high-pressure air.
Mining
Emeralds have been commercially mined in Australia in three main deposits Poona and Menzies in Western Australia, and Emmaville in New South Wales. The emeralds are usually in rocks among layers of other minerals such as mica. Open pit mining or terrace mining are the most common methods. Miners dig a pit with shovels, excavators or other earth moving equipment, depending on the scale of the mine. If the emerald-bearing ore is beneath a substantial cover of soil and rock, explosives might be used to remove this material. Sometimes high pressure water is used to blast the rock to reveal mineral bearing rocks. Tunnels are also used to extract emeralds from deeper rock layers.
| Fornitore di spedizioni | Spedizione a Australia | Spedizione nel resto del mondo |
|---|---|---|
| Standard Shipping - Tracked | $20.00 / 7 giorni | $30.00 / 14 giorni |
|
Australia
Standard Shipping - Tracked è scontato a $25.00 sugli ordini con 2 o più articoli
Resto del mondo
Standard Shipping - Tracked è scontato a $30.00 sugli ordini con 2 o più articoli
|
||
| FedEx | $40.00 / 3 giorni | $40.00 / 7 giorni |
|
Australia
FedEx è scontato a $40.00 sugli ordini con 2 o più articoli
Resto del mondo
FedEx è scontato a $40.00 sugli ordini con 2 o più articoli
|
||
| DHL | $30.00 / 2 giorni | $30.00 / 21 giorni |
|
Resto del mondo
DHL è scontato a $30.00 sugli ordini con 2 o più articoli
|
||
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PositivoVery pleased with the specimen and transaction
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Positivo
This stone made me fall in love with Padparadsha sapphire. Truly wonderful!
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Positivo
Sweet Thank you
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Neutro
Responsive seller, which is appreciated. Lovely gem. The only issue was with shipping. I paid for post but it was sent via Fedex. Fedex (of course) charged me illegal fees over a month after delivery! This was why I chose post and not Fedex.
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Positivo
Beautiful gemstone
Verifica
-
Descrizione Preciso
-
Immagini accurate
Comments
The Verified Seller responsible for this item has diligently provided us with accurate and comprehensive information, encompassing crucial details such as weight, dimensions, and treatment. It is important to reiterate our commitment to upholding the highest standards of integrity and transparency in the gemstone industry. As part of our policy, we strictly permit the sale of exclusively natural gemstones that have been sourced directly from the Earth. However, in the event that a gemstone has undergone any form of treatment, it is mandatory for the seller to provide full disclosure regarding the treatment process. Furthermore, we would like to emphasize that man-made gemstones, including simulants and imitations, are strictly prohibited on our platform. We prioritize the promotion of authentic, natural gemstones to ensure a genuine and trustworthy marketplace for our valued customers. Should you have any further inquiries or require additional assistance, please do not hesitate to reach out. We are here to assist you and provide a seamless experience on Gem Rock Auctions.
