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0.88ct Dark Opal Lightning Ridge Orange Fire
AU$976100% Natural Australian Opal, Untreated, Polished
Dimensions: 11x5x2.5 mm
Weight: 0.88 ct
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
26ct Natural Boulder Opal Rainbow Fire
AU$2,936Opal: 100% Natural, Solid, Untreated, Polished
Source: Winton, QLD, Australia
Dimensions: 28.5x20x6 mm
Weight: 26 ct
(Size and weight are approximate)
77.7ctw Natural Koroit Boulder Opal Pair
AU$1,254100% Natural, Untreated, Polished
Source: Koroit, QLD, Australia
Dimensions : 29×24.5×5.5 mm 26x23x7 mm
Total Weight: 77.7 ctw
(Size and weight are approximate)
41ct Natural Koroit Boulder Opal
AU$1,332100% Natural, Untreated, Polished
Dimensions : 41.5×20.5×6 mm
Weight: 41 ct
Source: Koroit, QLD, Australia
(Size and weight are approximate)
33ct Double Sided Natural Koroit Boulder Opal
AU$563100% Natural, Untreated, Polished
Dimensions : 26x23x7 mm
Weight: 33 ct
Source: Koroit, QLD, Australia
(Size and weight are approximate)
Large Boulder Opal Pendant 284 ct
AU$1,568This 284ct Australian Boulder Opal pendant showcases brilliant blue, cyan, green, and purple fire across natural ironstone. Polished into a large statement form and finished with a brown adjustable cord necklace, this natural untreated opal is ideal for collectors, daily wear, and meaningful October birthstone jewelry.
Type: Natural solid boulder opal pendant necklace
Origin: Winton Queensland Australia
Dimensions: 82 x 31 x 11 mm approx
Weight: 284ct approx
Color: flashes of blue cyan green and purple fire with ironstone
Cut and Shape: polished statement freeform drilled
Necklace: brown adjustable cord necklace
Treatment: 100 percent natural untreated opal not a doublet or triplet
Absolute Gem Rare Harlequin Boulder Opal 14.7 ct
AU$88,351Dimensions: 24.5×15.5×5.5 mm
Weight: 14.7 ct
Source: Opal Creek, Winton, Queensland, Australia
1.08ct Crystal Opal Lightning Ridge
AU$506Natural Solid Untreated Crystal Opal Polished Stone
Weight: 1.08 ct
Dimensions: 10x6x2.5 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
1.2ct Dark Opal Multicolor flash
AU$1,062Natural Solid Untreated Dark Opal / Semi Black Opal Polished Stone
Weight: 1.2 ct
Dimensions: 9x8x5.2 mm
Source : Lightning Ridge, NSW, Australia
Size and weight are approximate
1.35 ct Dark Opal Lightning ridge
AU$998Natural Solid Untreated Dark Opal / Semi Black Opal Polished Stone
Weight: 1.35 ct
Dimensions: 9.5x8x2 mm
Source : Lightning Ridge, NSW, Australia
Size and weight are approximate
2.75ct Crystal Opal Lightning Ridge
AU$2,280Natural Solid Untreated Crystal Opal Polished Stone
Weight: 2.75 ct
Dimensions: 15.2x9x3 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Purple Blue Winton Boulder Opal 22.32 ct
AU$848100% Natural Solid Untreated Boulder Opal Polished Stone
Weight: 22.32 ct
Dimensions: 37x17x4.8 mm
Source: Winton, QLD, Australia
Size and weight are approximate
54.2ct Natural Boulder Opal Large
AU$1,368Natural Solid Untreated Boulder Opal Polished Stone
Weight: 54.2 ct
Dimensions: 43.5x21x6 mm
Source: Winton, QLD, Australia
Size and weight are approximate
32ct Natural Boulder Matrix Opal Koroit Australia
AU$235Opal Details:
Type: Natural, Solid, Untreated Boulder Opal
Origin: Koroit, Queensland, Australia
Dimensions: 39 × 12 × 6.5 mm (approx.)
Weight: 32ct (approx.)
23.55ctw Natural Crystal Boulder Opal Parcel 6pcs
AU$128Natural Solid Untreated Pipe Crystal Boulder Opal Polished Stones
Quantity: 6 Pieces – the price is for all pieces. We do not sell separately.
Total Weight: 23 ctw
Dimensions:
Large Freeform Shape Opal : 20x7x5 mm
Small Freeform Shape Opal :15x8x4.5 mm
Color : Purple Blue Green
Shape : Oval Square Freeform
Source: Winton, QLD, Australia
Size and weight are approximate
23ctw Natural Crystal Boulder Opal Parcel 6pcs
AU$138Opal: Natural, Solid, Untreated, Polished
Source: Winton, QLD, Australia
Quantity: 6 Pieces – the price is for all pieces.Â
Total Weight: 23 ctw
Oval Opal Dimensions:
Large : 21.5x19x5 mm
Small : 15x17x4 mm
Freeform Opal Dimensions:
Large: 20x7x5 mm
Small:15x8x4.5 mm
(Size and weight are approximate)
33.63ct Crystal Boulder Opal Parcel
AU$138Natural Solid Untreated Pipe Crystal Boulder Opal Polished Stones
Quantity: 6 Pieces – the price is for all pieces. We do not sell separately.
Total Weight: 33.63 ctw
Dimensions:
Large Oval Shape Opal : 21.5x19x5 mm
Small Oval Shape Opal : 15x17x4 mm
Color : Purple
Shape : Oval Square Freeform
Source: Winton, QLD, Australia
Size and weight are approximate
Blue Winton Boulder Opal 5 ct
AU$456Natural Solid Untreated Boulder Opal Polished Stone
Weight: 5 carats
Dimensions: 16.5×8.5×3.2 mm
Source: Winton, QLD, Australia
Size and weight are approximate
2.68ct Natural Crystal Opal Lightning Ridge
AU$1,560Natural Solid Untreated Lightning Ridge Crystal Opal Polished Stone
Weight: 2.68 carats
Dimensions: 11×8.5×4 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Boulder Opal Pendant 71.5ct
AU$26471.5ct Koroit boulder opal pendant with green fire in natural wood fossil ironstone. Solid untreated Australian opal on adjustable cord, ready to wear.
Dimensions: 49.5 × 30 × 6.5 mm approx
Weight: 71.5 ct
Origin: Koroit, Queensland Australia
Opal Type: Natural Solid Wood Fossil Boulder Opal
Necklace: Adjustable dark brown cord
Treatment: 100% natural untreated opal
Natural Australian Opal
Explore genuine natural Australian opals from the world’s premier opal fields including Lightning Ridge, Queensland, and South Australia. Our collection features stunning black opals with intense color displays, vibrant boulder opals with natural ironstone backing, luminous crystal opals showcasing transparency, and elegant white opals with soft pastel hues. Each opal is ethically sourced, 100 percent natural and untreated, displaying unique play of color with brilliant flashes of red, blue, green, and rainbow patterns that make every stone genuinely irreplaceable.
Shop loose opal gemstones perfect for custom jewelry creation, finished opal rings and pendants in silver, gold, and platinum settings. Whether you are a collector seeking investment quality specimens, a jeweler sourcing premium gemstones, or someone drawn to the mesmerizing beauty of Australian opals, our curated selection delivers exceptional quality, authenticity, and the timeless appeal of Australia’s national gemstone celebrated worldwide as the October birthstone.
Natural Australian Opal FAQs
What is Australian opal?
Australian opal is a precious gemstone formed from silica deposits that displays unique play of color with flashes of blue, green, red, orange, and rainbow hues. Australia produces over 95 percent of the world’s precious opals from mining fields including Lightning Ridge, Queensland, and South Australia, making it the global center for opal production.
What are the different types of Australian opals?
The main types of Australian opals include black opal from Lightning Ridge with dark backgrounds enhancing color displays, boulder opal from Queensland with natural ironstone backing, crystal opal featuring transparency and luminosity, and white opal from South Australia with lighter milky backgrounds and pastel colors.
How do I know if my Australian opal is real?
Real Australian opals display natural play of color that shifts with movement and viewing angle, have irregular patterns unique to each stone, and show depth when examined closely. Doublets and triplets have visible layers when viewed from the side, while solid opals are cut from single pieces. Professional gemological testing can confirm authenticity definitively.
How do I care for my Australian opal jewelry?
Remove opal jewelry before swimming, bathing, or using harsh chemicals. Clean gently with mild soap and lukewarm water using a soft cloth. Avoid extreme temperature changes and prolonged direct sunlight. Store opals separately in soft pouches to prevent scratching from harder gemstones. With proper care, Australian opals remain beautiful for generations.
What is the difference between black opal and white opal?
Black opal features a dark background that makes colors appear more vivid and dramatic, found primarily at Lightning Ridge. White opal has a lighter milky background displaying softer pastel colors, sourced mainly from South Australian fields like Coober Pedy. Both are genuine precious opals with play of color.
Can Australian opals be worn every day?
Yes, Australian opals can be worn daily with reasonable care. Boulder opals are particularly durable due to their natural ironstone backing. Remove opal jewelry during activities involving impacts, chemicals, or extreme temperatures. Rings may require more careful wear than pendants or earrings due to exposure.
Why is Lightning Ridge famous for opals?
Lightning Ridge is famous for producing the world’s finest black opals with exceptional color displays on dark backgrounds. The unique geological conditions in this New South Wales region created over millions of years result in opals found nowhere else on Earth, making Lightning Ridge material highly sought after by collectors worldwide.