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15.7ct Natural Boulder Opal Turquoise Blue Green
AU$907Natural Solid Untreated Australian Boulder Opal
Weight: 15.7 ct
Dimensions: 28x11x5mm
Source: Winton, QLD, Australia
Size and weight are approximate
Note: This opal has minor fracture but still very stable.
Opal Doublet 11.9ct Red Multicolor Fire
AU$900Australian opal doublet showing strong red dominant fire with blue, green and orange flashes across a polished freeform cabochon, ideal for rings, pendants or custom jewellery. Suitable as a centre stone for bold jewellery design.
Type: Australian Opal Doublet
Origin: Australia
Dimensions: 21.4 x 17 x 3.2 mm
Weight: 11.9 ct
1.2 ct Dark Opal Rainbow Lightning Ridge
AU$900Source: Lightning Ridge, NSW, Australia
Dimensions: 9x7x3 mm approx
Weight: 1.2 ct approx
Boulder Opal Pendant 57ct
Original price was: AU$1,054.AU$897Current price is: AU$897.57ct solid boulder opal pendant from Winton Australia with electric blue and purple fire. 100% natural and untreated, polished and ready to wear with an adjustable necklace.
Type: Natural Solid Boulder Opal Pendant
Origin: Winton, Queensland, Australia
Weight: 57 ct approx.
Dimensions: 36 x 20 x 6 mm approx.
Color: Electric blue and purple fire with ironstone matrix
Cut/Shape: Rectangular polished cabochon
Necklace: Black Adjustable cord, easy and comfortable
Treatment: 100% natural, untreated opal (not a doublet or triplet)
29.67ct Natural Boulder Opal Green Blue Fire
AU$893100% Natural Boulder Opal
Weight: 29.67 ct
Dimensions: 36x15x5 mm
Source: Winton, QLD, Australia
17.4ct Natural Boulder Opal Vivid Green Blue Gem
AU$893Opal Details:
Type: Natural Boulder Opal
Origin: Winton, Queensland, Australia
Weight: 17.4ct Approx
Dimensions: 32 × 13.5 × 5mm Approx
3.6ct Natural Crystal Boulder Opal Round
AU$886Natural Solid Untreated Polished
Weight: 3.6ct approx
Dimensions: 10x9x5 mm approx
Source: Winton, QLD, Australia
6.95ct Crystal Boulder Opal
AU$8726.95ct Australian crystal opal from Queensland displays vibrant purple and blue fire glowing through a translucent honey body. Expertly polished in an oval cabochon shape, this 100% natural and untreated gemstone is perfect for fine jewelry, custom settings, or as an October birthstone collector’s piece.
Type: Natural Solid Crystal Boulder Opal
Origin: Queensland, Australia
Dimensions: 20 × 12.1 × 4.3 mm (approx.)
Weight: 6.95 ct (approx.)
Color: Brilliant purple and blue fire through translucent body
Cut/Shape: Oval cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
1.24ct Dark Opal Rainbow Fire
AU$8721.24ct 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
4.26ct Natural Crystal Opal Lightning Ridge
AU$872100% Natural Solid Crystal Opal Polished Stone
Weight: 4.26 ct
Dimensions: 12x11x5 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Metallic Green Fire Lightning Ridge Black Opal Teardrop 1 ct
AU$865Natural Solid Untreated Black Opal Polished Stone
Weight: 1 carat
Dimensions: 8.5x5x4mm
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
0.98ct Natural Black Opal – Oval Blue Green
AU$844Opal: Natural, Solid, Untreated, Polished
Dimensions: 8.2×6.9×2.7 mm
Weight: 0.98 ct
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
Blue Green Boulder Opal 24.87 ct
AU$844Natural Solid Untreated Australian Boulder Opal Polished Stone
Weight: 24.87 carats
Dimensions: 31.5x19x5 mm
Source: Winton, QLD, Australia
Size and weight are approximate
Sterling Silver Purple Boulder Opal Ring 37ct US 8 3/4
Original price was: AU$984.AU$836Current price is: AU$836.Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 20.5×16.5×6 mm
Whole Ring Weight: 37 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US8 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Purple Blue Winton Boulder Opal 22.32 ct
AU$836100% Natural Solid Untreated Boulder Opal Polished Stone
Weight: 22.32 ct
Dimensions: 37x17x4.8 mm
Source: Winton, QLD, Australia
Size and weight are approximate
Sterling Silver Ocean Blue Boulder Opal Ring 35.5 ct US 9 3/4
Original price was: AU$977.AU$831Current price is: AU$831.Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 20×16.5×5.5 mm
Whole Ring Weight: 35.5 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US9 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
1.63ct Natural Faceted Crystal Opal – Cushion Cut
AU$829Opal Details:
Type: Natural, Solid, Untreated, Faceted Crystal Opal
Origin: Andamooka, Australia
Dimensions: 9 × 8 × 4.5 mm (approx.)
Weight: 1.63ct (approx.)
Sterling Silver Half Moon Ocean Boulder Opal Ring 30 ct US 7 3/4
Original price was: AU$963.AU$818Current price is: AU$818.Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 23×15.5×5 mm
Whole Ring Weight: 30 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
2.96ct Dark Opal Green Blue Fire
AU$8152.96ct semi black opal from Lightning Ridge, Australia, displaying vivid green, cyan, and blue fire across a dark to translucent body. Polished oval cabochon loose stone, solid and untreated, ideal for fine jewelry or collector use.
Type: Natural solid semi black opal loose stone
Origin: Lightning Ridge, NSW, Australia
Weight: 2.96ct approx
Dimensions: 16.1 x 10.1 x 2.6 mm approx
Color: Green, cyan, and blue fire
Cut Shape: Polished oval cabochon
Treatment: 100% natural untreated not a doublet or triplet
23.94ct Natural Boulder Opal
AU$815100% Natural Boulder Opal
Weight: 23.94 ct
Dimensions: 37x15x5 mm
Source: Winton, QLD, Australia
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.