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54.2ct Natural Boulder Opal Large
AU$1,350Natural Solid Untreated Boulder Opal Polished Stone
Weight: 54.2 ct
Dimensions: 43.5x21x6 mm
Source: Winton, QLD, Australia
Size and weight are approximate
4.45ct Crystal Boulder Opal
AU$1,3364.45ct Australian crystal boulder opal featuring vibrant green and blue fire across a translucent body. Natural and untreated, ideal for high-end jewelry, collectors, or October birthstone gifts.
Type: Natural Solid Crystal Opal
Origin: Queensland, Australia
Dimensions: 15.7 × 11.1 × 4.7 mm (approx.)
Weight: 4.45 ct (approx.)
Color: Bright green-blue fire on translucent body
Cut/Shape: Teardrop cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
3.29ct Natural Dark Opal Freeform Neon Rainbow Fire
AU$1,336Opal: Natural, Solid, Untreated, Polished
Source: Lightning Ridge, Australia
Dimensions: 19.3×10.6×2.7 mm
Weight: 3.29 ct
(Size and weight are approximate)
41ct Natural Koroit Boulder Opal
AU$1,314100% Natural, Untreated, Polished
Dimensions : 41.5×20.5×6 mm
Weight: 41 ct
Source: Koroit, QLD, Australia
(Size and weight are approximate)
Large Boulder Opal Pendant 284 ct
Original price was: AU$1,546.AU$1,314Current price is: AU$1,314.This 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
Multi Color Fire Australian Dark Opal 2.49 ct
AU$1,307Opal: Natural, Solid, Untreated, Polished
Dimensions: 13.4×7.3×4 mm
Weight: 2.49 ct
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
3.75ct Natural Dark Opal Rolling Mackerel Pattern
AU$1,293100% Natural Dark Opal Polished Stone
Weight: 3.75 ct
Dimensions: 18x8x4.5 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Neon Bright Fire Australian Dark Opal 1.21 ct
AU$1,279Opal: Natural, Solid, Untreated, Polished
Dimensions: 10×6.7×3.2 mm
Weight: 1.21 ct
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
1.94ct Natural Dark Opal Lightning Ridge
AU$1,272100% Natural Solid Dark Opal Polished Stone
Weight: 1.94 ct
Dimensions: 13.5x8x2 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Dark Opal Oval Red Green Blue Fire 1.49ct
AU$1,258Type: Natural Solid Dark Opal
Origin: Lightning Ridge, New South Wales Australia
Weight: 1.49 ct
Dimensions: 9.8 x 7.6 x 3.1 mm approx
Color: Red green blue fire
Shape: Oval polished cabochon
Treatment: 100% natural untreated opal
4.05ct Natural Dark Opal -Teardrop Rainbow Fire
AU$1,258Opal Details:
Type: Natural Solid Untreated Polished Dark Opal
Origin: Lightning Ridge Australia
Dimensions: 19.5×9.9×3.2mm (approx.)
Weight: 4.05ct (approx.)
12.7ct Natural Boulder Opal Blue Green
AU$1,251Opal: 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
1.23ct Natural Dark Opal Rainbow Rolling Ribbon Pattern
AU$1,237100% Natural Dark Opal / Semi Black Opal Polished stone
Weight : 1.23 ct
Dimension : 10x7x2 mm
Source : Lightning Ridge, NSW, Australia
(Size and weight are approximate)
77.7ctw Natural Koroit Boulder Opal Pair
AU$1,237100% 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)
3.64ct Natural Dark Opal -Teardrop Rainbow Fire
AU$1,216Opal Details:
Type: Natural, Solid, Untreated Dark Opal
Origin: Lightning Ridge, Australia
Dimensions: 15.3×9.8×3.7mm (approx.)
Weight: 3.64ct (approx.)
Bright Blue Fire Black Opal 1.22 ct
AU$1,216Opal: Natural, Solid, Untreated, Polished
Source: Lightning Ridge, Australia
Dimensions: 8.5x7x3.4 mm approx
Weight: 1.22 ct approx
(Size and weight are approximate)
Sterling Silver Boulder Opal Ring US 9
Original price was: AU$1,406.AU$1,195Current price is: AU$1,195.Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 19×13.5×5.5 mm
Whole Ring Weight: 27.5 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US9 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Green Blue Boulder Opal Ring 28.5 ct US 10
Original price was: AU$1,406.AU$1,195Current price is: AU$1,195.Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 20×14.5×4.5 mm
Whole Ring Weight: 28.5 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US10 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
7x5mm + 6x4mm Crystal Opal Calibrated 4.71ct
AU$1,167Australian crystal opal calibrated parcel from Coober Pedy featuring four polished teardrop cabochons with electric neon orange yellow green cyan blue and pink fire. This matching set is ideal for rings earrings pendants and professional jewelry making.
Type: Natural Crystal Opal Calibrated Parcel
Origin: Coober Pedy South Australia
Total Weight: 4.71 ctw
Stone Sizes: 6 pieces approx 7 x 5 mm and 12 pieces approx 6 x 4 mm
Shape: Mixed calibrated shapes polished cabochon
Color: Electric neon orange yellow green cyan blue and pink fire
Treatment: 100 percent natural untreated opal not doublet or triplet
Suitable For: Rings earrings pendants matching sets and professional jewelry making
2.03ct White Opal Heart Vivid Pink Blue Green Fire
AU$1,167Type: Natural Solid Untreated White Opal
Origin: Coober Pedy, Australia
Dimensions: 8.7×10.5×3.8mm (approx.)
Weight: 2.03ct (approx.)
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.