Ruqayyah Snyder
Australia is known for its abundance of precious gemstones, including sapphires, opals, and diamonds. The country's vast landscape offers a diverse range of natural wonders, with many significant mining fields scattered across its states. The beauty of Australian gemstones lies not only in their brilliant colours and patterns but also in their rarity and unique characteristics. From the famous sapphires of Gemfields to the opal mines of Coober Pedy, the gemstones of Australia have captivated people worldwide, attracting collectors, jewellers, and those seeking a piece of natural wonder.
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What You'll Learn
- Opals, the national gemstone of Australia, are found in Andamooka, Coober Pedy, and Lightning Ridge
- Diamonds are sourced from the Argyle diamond mine in Western Australia
- Sapphires are found in New South Wales and Queensland
- Jade is found in Western Australia and Queensland
- Pearls are harvested in Queensland, Western Australia, and near Darwin in the Northern Territory
Opals, the national gemstone of Australia, are found in Andamooka, Coober Pedy, and Lightning Ridge
Opals are the national gemstone of Australia, and the country produces around 95% of the world's opals for use in the jewellery industry. Opals are found in several opal mining towns across Australia, with the most famous being Andamooka, Coober Pedy, and Lightning Ridge.
Coober Pedy, also known as the "opal capital of the world", is a small town in northern South Australia, 846 km (526 mi) north of Adelaide. The town is renowned for its opal mining history and its unique below-ground dwellings, called "dugouts", which were built to provide relief from the extreme desert heat. Coober Pedy has over 70 opal fields and supplies most of the world's gem-quality opals. The town is also known for its diverse cultural history, with a significant population of miners with Southern and Eastern European ancestry in the post-war period.
Andamooka, located on the Arcoona plateau in South Australia, is another famous opal mining town. Miners in Andamooka work over an area of about 52 square kilometres using various methods such as shaft digging, large bore-holes, open-cut excavations, and small tunnels.
Lightning Ridge, located in New South Wales, is also known for its opal mining. It was one of the earliest sites of opal mining in Australia, along with nearby towns like White Cliffs and Andamooka.
In addition to these famous opal mining towns, there are many other sites across Australia where opals and other gemstones are found. For example, the Opalton Field in Queensland was once one of the largest and most extensively worked opal deposits in the state. The Yowah opal field in Queensland is known for its unique "Yowah Nuts," precious opals found in siliceous ironstone nodules.
Australia is also home to other valuable gemstones, such as sapphires, rubies, emeralds, and diamonds. The Argyle diamond mine in Western Australia is known for producing rare pink and champagne-coloured diamonds.
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Diamonds are sourced from the Argyle diamond mine in Western Australia
Australia is a treasure trove of gemstones, with diamonds, rubies, sapphires, and emeralds among the precious stones found in this vast country. However, one particular source of diamonds stands out: the Argyle diamond mine in Western Australia.
The Argyle diamond mine is located in the remote and rugged East Kimberley region in the far northeast of Western Australia. This area is renowned for its natural beauty, including rocky red earth, ancient gorges, and unique flora and fauna. The mine is situated on the traditional country of the Miriuwung, Gidja, Malgnin, and Wularr people, and the local indigenous community was closely involved with the mine's operations.
The Argyle mine is historically significant as one of the world's most important diamond discoveries. It began production in 1983 and quickly captivated the world with its diamonds' exceptional depth, range, and intensity of colour. While the overall quality of Argyle diamonds was considered low, with only about 5% being gem-quality, the mine became known for its production of rare coloured diamonds.
The Argyle diamond mine was the world's primary source of pink and red diamonds, producing over 90% of the global supply. These diamonds were highly prized for their unique colour, with less than 1% of the mine's total production being pink. In addition to pink and red diamonds, Argyle also produced white, champagne, cognac, blue, and violet diamonds. The mine's output of coloured diamonds was notable, as it provided a large proportion of the world's natural coloured diamonds.
The Argyle diamond mine ceased operations in November 2020 after 37 years of production, yielding more than 865 million carats of rough diamonds. The mine's operator, Rio Tinto, is committed to respectfully decommissioning and rehabilitating the site, with plans to return the land to its traditional custodians. The Argyle mine's closure marked the end of an era, but its legacy lives on in the rare and valuable diamonds it brought to the world.
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Sapphires are found in New South Wales and Queensland
New South Wales is also known for its pink sapphires, which are now marketed through Ellerston Gems, named for the property where they are mined. The Packer family, of Australia's largest diversified media company, PBL, has been associated with this operation. The state is an important source of gem-quality corundum, which is mainly sapphire, and there are large areas of untested ground with encouraging inferred yields.
Queensland is also renowned for its sapphires, especially in the Central Highlands region. The Sapphire Gemfields, which include the townships of Rubyvale, Sapphire, Anakie, and Willows, cover almost 900 square kilometres and are known as one of the largest sapphire-bearing areas in the world. The sapphires found here are valued for their range of colours, including yellow, green, and parti sapphires. The Anakie region in Central Queensland is known for its diverse colours, types, and forms of sapphires, likely due to multiple outpourings of sapphires over time, rather than a single large volcanic eruption.
In both New South Wales and Queensland, sapphires are often found in association with rubies. Rubies are less common in Australia but can be found at various sites in New South Wales, including the Macquarie and Cudgegong Rivers and the Tumbarumba area. The major source of gem-quality rubies is in the Gloucester-Barrington area, where they are found alongside sapphires of various colours.
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Jade is found in Western Australia and Queensland
Jade is a gemstone that has been prized for its beauty and used for ornaments, tools, and weapons for thousands of years. In 1863, it was discovered that there are two types of jade minerals: jadeite and nephrite, both of which are found in Australia.
The largest Australian nephrite jade deposit is found in Cowell, South Australia. It was discovered in 1965 by a local farmer who found a 3-4 kg boulder of nephrite near an outcrop of white marble. Cowell is currently the only commercial jade mine in Australia. Jade is extracted using excavators in open pits, and diamond-tipped tools are used to cut the stones. The jade is then transported for sawing and grading according to colour and quality.
There have also been reports of nephrite jade occurrences in the Pilbara region of Western Australia, near the old Lionel asbestos mining area. However, these are unconfirmed, and the material marketed as 'Pilbara Jade' is not true jade but a chloritic serpentinite that may contain irregular patches of fibrous serpentine.
In addition to the deposits in South Australia and Western Australia, Australia has one other known nephrite jade deposit: Tamworth, New South Wales. Small mining ventures in this area produced about 600 kg of nephrite between 1977 and 1996.
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Pearls are harvested in Queensland, Western Australia, and near Darwin in the Northern Territory
Australia is known for its diverse gemstones, including diamonds, rubies, sapphires, emeralds, opals, and jade. Among these gems, pearls hold a unique place, being harvested in Queensland, Western Australia, and near Darwin in the Northern Territory.
The pearling industry is centred in Broome, north of the Kimberley region of Western Australia. This region is renowned for its pristine, nutrient-rich waters, providing the ideal environment for cultivating the coveted Australian South Sea pearls. With their thick nacre and magnificent lustre, these pearls are sought-after worldwide.
In Western Australia, the Willie Creek Pearl Farm offers a unique experience, allowing visitors to witness the entire process of pearl farming, from seeding to cultivating and harvesting. The farm is located in Broome and provides a helicopter tour for a breathtaking view of the vibrant landscape.
Near Darwin in the Northern Territory, pearl cultivation is also a prominent industry. Companies like Paspaley Pearls and Clipper Pearls have established pearl farms in this region, employing many locals and backpackers during the harvest season, which typically runs from April/May to September/October.
Queensland, known for its diverse natural wonders, is another significant location for pearl harvesting in Australia. Backpackers and travellers seeking work in the pearling industry can find opportunities in this state, often involving work on boats and assisting with pearl harvesting.
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Frequently asked questions
Many different types of gems are found in Australia, including opal, diamonds, sapphires, rubies, emeralds, jade, pearls, and peridot.
Opal is the national gemstone of Australia and over 90% of the world's opals are found there.
Clarity is the quality most prized in gemstones. A perfect gemstone will be a flawless, transparent crystal that sparkles brilliantly as it reflects light internally. Colourless diamonds are usually the most highly valued, however, diamonds tinted blue or pink from impurities are sometimes more valuable because they are so rare.
The Argyle diamond mine in Western Australia is the world's leading producer of diamonds. The Cudgegong River in New South Wales, the towns of Mintabie, Andamooka, and Coober Pedy in South Australia, and Queensland are also known for their gems.
