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1.2ct Crystal Boulder Opal
AU$1431.2ct Australian crystal opal from Winton, Queensland featuring vivid green and blue fire flashing through a natural crystal body with subtle ironstone backing. Polished oval cabochon, 100% natural and untreated, ideal for fine jewelry and October birthstone designs.
Type: Natural Solid Crystal Opal (Pipe Opal)
Origin: Winton, Queensland, Australia
Weight: 1.2 ct
Dimensions: 9 x 6 x 3 mm approx
Color: Vivid green and blue fire
Cut Shape: Oval cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
6.99ct Natural Crystal Boulder Opal
AU$200Natural Solid Untreated Australian Crystal Boulder Opal Polished Stone
Weight: 6.99Â carats
Dimensions: 15.5x10x6Â mm
Source:Â Winton, QLD, Australia
Size and weight are approximate
4.68ct Natural Crystal Boulder Opal
AU$328Opal: Natural, Solid, Untreated, PolishedÂ
Source:Â Winton, QLD, Australia
Dimensions: 17x17x5Â mm
Weight: 4.68 ct
Color: Purple, Yellow
Shape: Rectangle
Size and weight are approximate
3.6ct Natural Crystal Boulder Opal Round
AU$898Natural Solid Untreated Polished
Weight: 3.6ct approx
Dimensions: 10x9x5 mm approx
Source: Winton, QLD, Australia
Black Opal Ring 18k Gold Bezel
AU$2,138Australian black opal ring featuring a natural solid Lightning Ridge opal set in 18k yellow gold. The polished gemstone displays vivid orange yellow green and blue fire, making this refined opal ring ideal for fine jewelry and October birthstone collectors.
Type: Natural Solid Black Opal Ring
Origin: Lightning Ridge New South Wales Australia
Opal: Natural solid untreated polished black opal
Opal Color: Orange yellow green and blue fire
Metal: 18k Australian yellow gold stamped 750
Total Weight: 14.82 ctw approx
Ring Size: US 7 approx
Treatment: 100 percent natural untreated opal not doublet or triplet
Suitable For: Fine jewelry opal ring October birthstone gift and statement wear
2.54ct Natural Dark Opal Multicolor Fire
AU$1,710Natural Solid Untreated Australian Opal Polished stone
Weight: 2.54 carats
Dimensions: 17x10x2 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Boulder Opal Pendant 86ct Green Blue Flash
AU$235Large 86ct Koroit boulder opal pendant with vivid blue and green fire veins in rich brown ironstone. Solid, double sided and untreated, ready to wear on adjustable leather cord necklace.
Dimensions: 36 × 26 × 9 mm approx
Weight: 86 ct approx
Origin: Koroit, Queensland Australia
Opal Type: Natural Solid Boulder Opal
Finish: Double sided polished
Necklace: Brown Greek leather cord, sliding adjustable
Treatment: None, 100% natural untreated opal
Additional custom lighting or photo requests are not available.
Boulder Opal Pendant 18 ct
AU$235Type: Natural Solid Untreated Polished Boulder Opal
Origin: Winton, Queensland, Australia
Dimensions: 24.7 × 15.7 × 5.3 mm approx
Weight: 18ct approx
Color: Soft pastel rainbow fire of pink, green, blue, and hints of orange
Necklace: Adjustable genuine Greek leather cord
Large Koroit Boulder Opal Pendant 83ct
AU$499Type: Natural Solid Untreated Boulder Opal
Origin: Koroit, Queensland, Australia
Dimensions: 52x24x7 mm approx
Weight: 83ct approx
Color: Rich brown ironstone with intricate natural matrix pattern and subtle fire
Use: Unisex opal pendant statement jewelry gift ready opal necklace
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Boulder Opal Pendant 32ct
AU$456Type: Natural Solid Untreated Boulder Opal
Origin: Winton, Queensland, Australia
Dimensions: 31 × 22 × 7 mm approx
Weight: 32ct approx
Color: Blue and green fire with earthy sandstone matrix
Necklace: Adjustable black cord gift ready
Use: Statement pendant unisex jewelry collector piece
Boulder Opal Pendant with Adjustable Necklace 56 ct
AU$257Opal Weight: 56 ct
Opal Dimensions: 52x17x7 mm
Source: Winton, QLD, Australia
Boulder Opal Pendant 103ct Multicolor Fire
AU$670Electric rainbow veins glow through natural ironstone in this 103ct Australian boulder opal pendant. Hand polished and set on an adjustable black cord, perfect for bold October birthstone jewelry.
Dimensions: 38 × 33 × 11 mm approx
Weight: 103ct approx
Origin: Winton, Queensland, Australia
Opal Type: Natural Solid Boulder Opal
Necklace: Adjustable black cord, gift ready
Treatment: None (100% natural, not a doublet or triplet)
Additional custom lighting image requests are not available.
Large Koroit Boulder Opal Pendant 86ct
AU$542Type: Natural Solid Untreated Boulder Opal
Origin: Koroit, Queensland, Australia
Dimensions: 44 × 27 × 10 mm approx
Weight: 86ct approx
Color: Rainbow sparkling fire including red green and blue in ironstone matrix
Necklace: Black rope length adjustable gift ready
Use: Unisex pendant daily wear or collector jewelry
6.17ct Natural Boulder Opal Multicolor Fire
AU$1,682Opal: Natural, Solid, Untreated,Polished
Weight: 6.17 ct
Dimensions: 20x10x3.5 mm
Source: Winton, QLD, Australia
(Size and weight are approximate)
Koroit Boulder Opal Pendant 48ct
AU$456Type: Natural Solid Untreated Polished Boulder Opal
Origin: Koroit, Queensland, Australia
Dimensions: 25 × 25 × 8 mm approx
Weight: 48ct approx
Color: Brown ironstone with fiery rainbow sparkling fire veins of green blue purple
Shape: Triangular pendant, solid untreated opal for statement jewelry
6.4ct Natural Crystal Boulder Opal
AU$2,829Natural Solid Untreated Australian Crystal Boulder Opal Polished Stone
Weight: 6.4 ct
Dimensions: 19x12x4 mm
Source: Winton, QLD, Australia
Size and weight are approximate
0.85ct Natural Black Crystal Opal Oval Lightning Ridge
AU$335💎 Opal Details:
Type: Natural Solid  UntreatedÂ
Origin: Lightning Ridge, Australia
Dimensions: 8.5 × 7.5 × 2 mm approx
Weight: 0.85ct approx
1.2ct Natural Crystal Opal Lightning Ridge
Original price was: AU$527.AU$420Current price is: AU$420.Natural Solid Untreated Australian Crystal Opal
Weight: 1.2 ct
Dimensions: 9x8x3 mm
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
1.31ct Natural Dark Opal Multi-Color Fire
Original price was: AU$1,382.AU$968Current price is: AU$968.💎 Opal Details:
Type: Natural Dark Opal (Semi Black Opal)
Origin: Lightning Ridge, Australia
Dimensions: 10×5.5×3 mm approx
Weight: 1.31ct approx
5.25ct Natural Dark Opal Lightning Ridge
AU$2,066Natural Solid Untreated Australian Lightning Ridge Dark Opal Polished Stone
Dimensions: 17×10.5×5 mm
Weight : 5.25 ct
Source : Lightning ridge, NSW, Australia
Size and weight are approximate
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.