Damon Mcknight
Opals are precious gemstones that display a rainbow-like array of colours due to their intrinsic microstructure, which diffracts white light into all the colours of the spectrum. Opals are found all around the world, but Australia produces 95% of the world's supply and is the only part of the world where opalised plant and animal fossils have been discovered. The unique geological formations in Australia, specifically the silica-rich water that seeped deep into the cracks of the Earth, have favoured the formation of this stone. Opal mining towns in Australia include Coober Pedy, Andamooka, White Cliffs, and Lightning Ridge, which are rich places to experience Australia's mining heritage and outback way of life.
| Characteristics | Values |
|---|---|
| Opal fields in Australia | Queensland, New South Wales, and South Australia |
| Opal mining towns | Coober Pedy, Andamooka, White Cliffs, Lightning Ridge |
| Opal types | White Opal, Black Opal, Boulder Opal, Pipe Opal, Jundah-blue Opal, Yowah Nut Opal |
| Opal colours | Rainbow, blue-green, black, white, red |
| Opal formation | Opal formation began around 140 million years ago when an inland sea covered much of central Australia. The silica-rich water seeped into the Earth's cracks and slowly hardened into opal over millions of years. |
| Opal value | Australian opal is considered the finest in the world and accounts for 95% of the world's opal supply. |
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What You'll Learn
Coober Pedy, South Australia
Coober Pedy, a town in northern South Australia, is known as the "opal capital of the world" due to the large quantity of precious opals mined there. It is situated about 750-846 km north of Adelaide, on the Stuart Highway, in the Far North region of South Australia. The opal mining fields of Coober Pedy lie in the Outback of South Australia, in the Stuart Range, and the town is surrounded by a stony, treeless desert. The name "Coober Pedy" is believed to originate from the Kokatha-Barngarla term "kupa-piti," which translates to "whitefellas' hole," but in 1975, the local Aboriginal people adopted the name "Umoona," meaning "long life."
Coober Pedy has a rich history of opal mining, dating back to 1915 when a teenage boy, William Hutchison, whose father was gold prospecting in the area, discovered opal in Coober Pedy. However, it took some time for opal mining to gain traction in the region. After World War I, returning soldiers, accustomed to living in trenches, were drawn to the opal fields, seeking their fortune. Similarly, after World War II, a wave of immigrants from Southern and Eastern Europe, particularly those from war-torn countries, took up opal mining in Australia. As a result, today, around 60% of miners living in Coober Pedy have Southern or Eastern European ancestry.
The town of Coober Pedy is unique in that many of its residents choose to live underground in dugouts to escape the extreme heat during summers and to keep warm in winters. The landscape of Coober Pedy is characterised by numerous mining shafts, making it a hazardous place for tourists to wander carelessly. Over the years, miners have dug more than 250,000 shafts in the area.
Coober Pedy is the world's primary source of opal, specifically white opal, and it has over 70 opal fields. The town's shops display more opal than anywhere else globally, offering a wide range of opal types from all around Australia. Visitors can also witness opal cutting demonstrations and explore various opal mines, such as the Umoona Opal Mine.
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Andamooka, South Australia
Opal is a gemstone valued for its beauty, and Australia is synonymous with this precious stone. Opals display a rainbow-like colour due to their intrinsic microstructure, which diffracts white light into all the colours of the spectrum. Opals are multi-coloured and consist of small spheres of silica arranged in a regular pattern, with water between the spheres.
The Andamooka opal field has a typical 'opal country' topography, with low-lying gibber plains, shallow dips, and basins. The area was once an inland sea, and ancient shells and bones are often discovered as opalised fossils. The Andamooka opal field lies 520 km north of Adelaide, and miners work over an area of about 52 square kilometres on the Arcoona plateau.
The Andamooka matrix is a unique brown sedimentary rock that contains tiny deposits of gem opal. When cut, polished, and treated, it produces a sought-after stone that reflects the rainbow colours of crystal opal in a dense black to earthy brown base-rock. This matrix is often used to create attractive jewellery or desk ornaments.
The best time to visit opal fields in Australia is from April to September, as summer should be avoided due to high temperatures and possible heavy rains, which can make road access challenging.
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White Cliffs, New South Wales
White Cliffs is a small outback town in New South Wales, Australia, located 255 km northeast of Broken Hill and 93 km north of Wilcannia. It is known for its opal mining history and unique features, including underground living. White Cliffs was established in the late 19th century when opal was discovered in the area, and it has been a centre of opal mining ever since. The town is one of the only places in the world where white opal is found, and it is also famous for its rare 'pineapple' opals with distinctive spiky shapes.
The discovery of opal in White Cliffs dates back to the 1880s when miners and dreamers first arrived in search of the precious gemstone. The town is home to Australia's oldest commercial opal field, and opal mining has been a significant part of its economy and culture. Visitors to White Cliffs can take underground tours of working mines, such as the Red Earth Opal Mine Tour, where they can learn about the mining process and even try their luck at finding opals. The town also offers above-ground attractions, including the unique landscape of the outback and the infamous pineapples that give White Cliffs its nickname, "Home of the Pineapple."
Accommodation in White Cliffs is available in underground motels and B&Bs, providing a unique experience and shelter from the intense heat. The temperatures inside these underground dwellings range from 20 to 22 degrees Celsius, offering a comfortable escape from the extreme outdoor climate. The town is also home to the first solar power station in Australia, the White Cliffs Solar Power Station, which was built in 1981 and later upgraded in 1996 to increase its energy production capacity.
White Cliffs is a remote destination, with travel times of approximately 12 hours from Sydney, 10.5 hours from Canberra, 11.5 hours from Melbourne, and nine hours from Adelaide. Visitors may need a 4WD vehicle for unsealed roads and national park access. The township can be included in a road trip to nearby destinations such as Bourke, Wilcannia, Broken Hill, Tibooburra, and Cobar. White Cliffs provides a unique and unforgettable outback experience, combining opal mining heritage, natural beauty, and the charm of its small community.
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Lightning Ridge, New South Wales
Lightning Ridge in New South Wales is one of the four opal mining towns that have become household names in Australia. The other three are Coober Pedy, Andamooka, and White Cliffs. Opal mining towns are wild and rugged places, surrounded by a moonscape of mullock humps. People in these towns brave harsh weather conditions in their search for precious gemstones.
Lightning Ridge is famous for producing black opal, the darkest and most valuable form of opal. It is the only place in the world where this elusive gemstone is found. The town is dotted with opal rubble and mining equipment, with signs warning visitors not to stray off into the bush due to the risk of falling into hidden or obsolete mining shafts. These small-scale mines consist of a maze of holes and tunnels beneath the ground, mostly operated with basic mechanical equipment.
Lightning Ridge has an underground opal mine museum, where visitors can learn about the history of the region and the hardships faced by early miners. There is also a fossicking heap outside the Lightning Ridge Information Centre, where visitors can try their luck at finding opal nuggets. The town offers guided fossicking tours at The Big Opal, and Outback Opal Tours takes visitors underground. Lightning Ridge is also home to the Australian Opal Centre, which showcases opal collections and exhibitions, and the Chambers of the Black Hand, where fascinating sculptures are carved into the walls of an underground mine.
The best time to visit Lightning Ridge is from April to September, as summer should be avoided due to high temperatures and heavy rains that can make road access challenging.
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Queensland
To find opals in Queensland, you can visit designated fossicking areas, but you will need a license to do so. In the past, opals were usually discovered by someone, not looking for opals, picking up a stone that shone in the sun. Opals are glassy-looking stones that glisten when the sun hits them, so they are easily spotted. You can also visit local opal shops in Quilpie to see these beautiful stones or try your hand at noodling (searching for opals on the surface of opal fields).
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Frequently asked questions
Opal fields in Australia lie in the three states of Queensland, New South Wales, and South Australia.
Four towns in particular are synonymous with opal mining: Coober Pedy, Andamooka, White Cliffs, and Lightning Ridge.
Australian opals can be categorised into the following varieties: white opal, black opal, boulder opal, and pipe opal.
Australian opals are considered the finest in the world due to their unique geological formations. They are also the most valuable because they possess a vibrant play of colours.
