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1.59ct Natural Black Opal – Oval Neon Blue Fire
AU$1,941Opal Details:
Weight: 1.59 ct
Dimensions: 9×7.5×3 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
11.3 ct Half Moon Crystal Boulder Opal – Blue Green
AU$4,567Opal Details:
Natural Solid Untreated Australian Boulder Opal Polished Stone
Weight: 11.3 carats
Dimensions: 20×13.5×7.5 mm
Source: Winton, QLD, Australia
Size and weight are approximate
36.28ct Top Gem Crystal Boulder Opal Heart
Opal Details:
Natural Solid Untreated Australian Boulder Opal Polished Stone
Weight: 36.28 carats
Dimensions: 22x25x11 mm
Source: Winton, QLD, Australia
Size and weight are approximate
5.6ctw Natural Dark Opal Parcel 6pcs
AU$1,407Opal: 100% Natural, Solid, Untreated, Polished
Source: Lightning Ridge, Australia
Total Weight: 5.6 ctw
Largest Opal Size: 8.5x7x2.2 mmÂ
Smallest Opal Size: 7.5×5.5×2.5 mm
Color: Pink, Orange, Yellow, Green, Blue
(Size and Weight are approximate)
5ct Natural Boulder Opal Neon Blue Green Fire
AU$771Opal: Natural, Solid, Untreated, Polished
Dimensions: 19x11x3.5mm
Source: Winton, QLD, Australia
Weight: 5 ct
Color: Blue, Purple
Shape: Freeform
Size and weight are approximate
10.8ct Natural Boulder Opal Wood Fossil
AU$978Opal: Natural, Solid, Untreated, Polished
Color: Purple
Shape: Freeform
Weight: 10.8 ct
Dimensions: 33×9.5x4mm
Source: Winton, QLD, Australia
Size and weight are approximate
10ct Boulder Opal Red Blue Green Stripe Flash
AU$40010ct Australian boulder opal from Winton Queensland reveals striking red, blue, and green stripe flashes across its dark ironstone body. Expertly polished freeform cut, 100% natural and untreated. Ideal for fine jewelry, collector gemstone, or meaningful October birthstone gift.
Type: Natural Solid Boulder Opal
Origin: Winton, Queensland, Australia
Dimensions: 24 x 12.5 x 4 mm (approx.)
Weight: 10ct (approx.)
Color: Brilliant red, blue, and green stripe flash
Cut/Shape: Freeform polished cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
9.5ct Natural Boulder Opal Blue Green
AU$549Opal: Natural, Solid, Untreated, Polished
Source: Winton, QLD, Australia
Dimensions: 17x17x4mm
Weight: 9.5 ct
Color: Blue, Green
Shape: Freeform (Triangular)
(Size and weight are approximate)
7.6ct Natural Boulder Opal Blue Green
AU$678Opal: Natural, Solid, Untreated, Polished
Source: Winton, QLD, Australia
Dimensions: 24.5x10x4mm
Weight: 7.6 ct
Color: Blue, Purple
Shape: Freeform
Size and weight are approximate
12.7ct Natural Boulder Opal Blue Green
AU$1,270Opal: Natural, Solid, Untreated, Polished
Source: Winton, QLD, Australia
Dimensions: 25x13x5mm
Weight: 12.7 ct
Color: Blue, Green
Shape: Freeform (Half Moon)
Size and weight are approximate
7.7ct Natural Boulder Opal
AU$599Opal: Natural, Solid, Untreated, Polished
Color: Green, Blue, Pink
Shape: Freeform (Marquis)
Weight: 7.7 ct
Dimensions: 30x8x4.5mm
Source: Winton, QLD, Australia
Size and weight are approximate
1.36ct Natural Black Opal Blue Fire Teardrop
AU$499100% Natural Solid Black Opal Polished Stone
Weight: 1.39 ct
Dimensions: 9×7×3 mm
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
1.15ct Natural Dark Opal – Teardrop Multi-Color
AU$692100% Natural Solid Dark Opal Polished Stone
(partially transparency)
Weight: 1.15 ct
Dimensions: 11.5x6x2.5 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
1.81ct Natural Dark Opal – Pear Green Yellow
AU$692
 Opal Details:
-
Type: Natural, Solid, Untreated, Polished Dark Opal (Partially Transparent)
-
Origin: Lightning Ridge, NSW, Australia
-
Dimensions: 12 × 10.5 × 2 mm (approx.)
-
Weight: 1.81 ct (approx.)
Koroit Boulder Opal Pendant 20ct
AU$70Australian boulder opal pendant featuring rich brown ironstone veins in a double sided polished finish. Natural solid untreated opal, drilled and ready to wear on an adjustable rope cord.
Dimensions: 19 × 18 × 5 mm approx
Weight: 20 ct approx
Origin: Koroit, Queensland Australia
Opal Type: Natural Solid Boulder Opal
Finish: Double sided polished freeform with drilled hole
Necklace: Adjustable cream rope cord
Treatment: 100% natural untreated opal
Lighting: Standard studio lighting. Custom lighting requests unavailable.
33ct Koroit Boulder Opal Pendant
AU$14133ct Koroit Boulder Opal pendant necklace from Koroit, Queensland Australia reveals earthy brown ironstone matrix. Expertly polished in an elongated marquise shape with a natural drilled hole, it’s ready to wear on an adjustable brown rope cord. 100% natural, untreated, and ideal for October birthstone jewelry.
Type: Natural Solid Boulder Opal Pendant
Origin: Koroit, Queensland, Australia
Dimensions: 35 × 16 × 6 mm (approx.)
Weight: 33 ct (approx.)
Color: Brown, gold, and violet through ironstone matrix
Cut/Shape: Marquise polished cabochon with drilled hole
Necklace: Adjustable brown rope cord, ready to wear
Treatment: 100% natural, untreated opal (not a doublet or triplet)
2.35ct Natural Crystal Opal Lightning Ridge
AU$721Double Sided  Natural Solid Crystal Opal PolishedÂ
Weight: 2.35 ct
Dimensions: 11x7x4.5 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Transparent
Wood Fossil Boulder Opal Pendant 54ct
AU$457Opal Details:
Type: Natural, Solid, Untreated Polished Wood Fossil Boulder Opal
Origin: Queensland, Australia
Dimensions: 36 × 25 × 5 mm (approx.)
Weight: 54ct (approx.)
Necklace Details:
Type: Adjustable Slide Knot Cord
Color: Dark Brown
1.47ct Natural Dark Opal Multicolor Fire
AU$535100% Natural Solid Dark Opal Polished Stone
Weight: 1.47 ct
Dimensions: 11.5x7x3 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
1.24ct Dark Opal Rainbow Fire
AU$8851.24ct Australian dark opal from Lightning Ridge features intense neon rainbow fire with vivid flashes of red, pink, green, cyan, yellow, blue, and violet. Cut in a teardrop cabochon and fully natural and untreated, this rare gemstone is ideal for fine jewelry and October birthstone designs.
Type: Natural solid dark opal gemstone (semi black opal, not transparent)
Origin: Lightning Ridge, New South Wales, Australia
Weight: 1.24 carat
Dimensions: 8.5 × 7 × 2.8 mm approx.
Color: Neon rainbow fire with red, green, blue, violet flashes
Cut / Shape: Teardrop cabochon
Treatment: 100% natural and untreated opal (not a doublet or triplet)
Use: Perfect for opal rings, pendants, engagement jewelry, or collector gemstones
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.