Explore opals by type
Black Opal
Boulder Opal
Pipe Opal
Crystal Opal
White Opal
Opal Jewelry
Explore opals by shape
Oval
Teardrop
Heart
Round
Square
Freeform
Filters
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$691100% 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$691
 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$720Double 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
Boulder Opal Pendant 57ct
AU$1,06957ct 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)
Wood Fossil Boulder Opal Pendant 54ct
AU$456Opal 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$534100% 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$8841.24ct 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
2.97ct Natural Crystal Opal Lightning Ridge
AU$1,140100% Natural Solid Black Crystal Opal Polished Stone
Weight: 2.97 ct
Dimensions: 11.5x8x4.5 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Transparent
4.82ct Natural Crystal Opal Lightning Ridge
AU$1,639100% Natural Solid PolishedÂ
Weight: 4.82 ct
Dimensions: 18×12.5×3 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
1.94ct Natural Dark Opal Lightning Ridge
AU$1,290100% Natural Solid Dark Opal Polished Stone
Weight: 1.94 ct
Dimensions: 13.5x8x2 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
1ct Natural Crystal Boulder Opal
AU$641100% Natural Solid Crystal Boulder Opal Polished Stone
Weight: 1 ct
Dimensions: 13x6x1.8 mm
Source: Queensland, Australia
Size and weight are approximate
Transparent
Crystal Opal 1.07ct
AU$713100% Natural Solid Crystal Opal Polished Stone
Weight: 1.07 ct
Dimensions: 13x6x1.5 mm
Source: Queensland, Australia
Size and weight are approximate
Transparent
Wood Fossil Boulder Opal Pendant 35ct
AU$45635ct Australian wood fossil boulder opal pendant from Winton, Queensland featuring vivid green, blue, and yellow fire with subtle orange flashes. Polished teardrop shape with natural drilled hole, ready to wear on a brown adjustable cord. 100% natural and untreated October birthstone opal.
Type: Natural Solid Wood Fossil Boulder Opal Pendant
Origin: Winton, Queensland, Australia
Weight: 35 ct (approx.)
Dimensions: 31 x 20 x 6 mm (approx.)
Color: Green, blue, yellow, and orange fire in fossil wood matrix
Cut Shape: Teardrop polished freeform
Necklace: Brown adjustable cord, ready to wear
Treatment: 100% natural, untreated opal (not a doublet or triplet)
Wood Fossil Boulder Opal Pendant 58ct
AU$27858ct Australian wood fossil boulder opal pendant from Winton, Queensland featuring natural brown ironstone with subtle blue and purple fire. Polished organic shape with a natural drilled hole, supplied with a dark brown adjustable cord. 100% natural and untreated, ideal for October birthstone jewelry.
Opal Type: Natural Solid Wood Fossil Boulder Opal
Origin: Winton, Queensland, Australia
Weight: 58 carat
Dimensions: 44 x 24 x 6 mm
Color: Natural brown fossil ironstone with blue and purple fire
Cut / Shape: Polished freeform cabochon
Pendant Style: Natural drilled pendant
Necklace: Dark brown adjustable cord included
Treatment: 100% natural and untreated
Not: Doublet or triplet
Wood Fossil Boulder Opal Pendant 19ct
AU$24219ct Australian wood fossil boulder opal pendant from Winton, Queensland featuring glittery turquoise and green fire within natural ironstone. Polished drilled cabochon paired with a beige adjustable cord. 100% natural and untreated, ideal for October birthstone jewelry and everyday statement wear.
Opal Type: Natural solid wood fossil boulder opal
Origin: Winton, Queensland, Australia
Weight: 19 carat
Dimensions: 23 x 14 x 7.5 mm (approx.)
Color: Glittery turquoise and green fire with natural ironstone
Cut / Shape: Polished cabochon with drilled hole
Pendant Style: Organic freeform cabochon (not flat freeform slab)
Necklace: Beige adjustable cord, ready to wear
Treatment: 100% natural, untreated opal (not a doublet or triplet)
Wood Fossil Boulder Opal Pendant 17ct
AU$22817ct Australian wood fossil boulder opal pendant from Winton, Queensland featuring vivid turquoise, blue and green fire through natural ironstone matrix. Polished cabochon with a natural drilled hole, paired with a beige adjustable cord. 100% natural and untreated, ideal for October birthstone jewelry.
Type: Natural solid wood fossil boulder opal pendant
Origin: Winton, Queensland, Australia
Weight: 17 ct
Dimensions: 19 x 17 x 6 mm (approx.)
Color: Turquoise, blue and green fire with ironstone matrix
Cut Shape: Polished cabochon, drilled
Necklace: Beige adjustable braided cord
Treatment: 100% natural, untreated opal (not a doublet or triplet)
Wood Fossil Boulder Opal Pendant 58ct
AU$38558ct Australian wood fossil boulder opal pendant featuring vivid green blue and soft pink fire within natural ironstone and fossil patterns. Polished freeform cabochon with drilled hole, paired with a brown adjustable cord necklace. 100% natural and untreated October birthstone opal.
Type: Natural Solid Boulder Opal Pendant
Material: Wood Fossil Boulder Opal
Origin: Queensland, Australia
Weight: 58 ct
Dimensions: 46 x 19 x 7 mm approx.
Color: Green blue pink fire with fossil wood pattern
Cut Shape: Freeform polished cabochon
Hole: Naturally drilled
Necklace: Brown adjustable cord necklace included
Treatment: 100% natural untreated opal not a doublet or triplet
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.