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3.29ct Crystal Opal
AU$3873.29ct Australian crystal opal with green fire and soft lavender tones. Solid natural untreated gemstone ideal for fine jewelry or October birthstone jewelry setting.
Dimensions: 15.2 × 9.9 × 3.8 mm approx
Weight: 3.29 ct
Origin: Queensland Australia
Opal Type: Natural Solid Crystal Opal
Shape: Freeform triangular cabochon
Treatment: 100% natural untreated opal
2ct Crystal Boulder Opal
AU$3872ct Australian crystal opal from Queensland with soft translucent body tone and gentle pastel color. Expertly polished into an oval cabochon, 100% natural and untreated gemstone perfect for fine jewelry, October birthstone gifts, or collectors.
Type: Natural Solid Crystal Opal
Origin: Queensland, Australia
Dimensions: 10.4 × 7.7 × 3.9 mm (approx.)
Weight: 2.0 ct (approx.)
Color: Soft translucent pastel tone
Cut/Shape: Oval cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
1.94ct Natural Black Opal Round Blue & Green Fire
AU$387Opal Details:
- Type: Natural Black Opal
- Origin: Lightning Ridge, Australia
- Dimensions: 9.7 × 9.4 × 3 mm
- Weight: 1.94ct
Crescent Moon Crystal Opal 1.52 ct
AU$387Natural Solid Untreated Crystal Opal Polished Stone
Weight: 1.52 carats
Dimensions: 18x7x2 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Purple Striped Boulder Opal 28.1 ct
AU$387Natural Solid Untreated Australian Boulder Opal Polished Stone
Weight: 28.1 carat
Dimensions: 27×19×5.5 mm
Source: Winton, QLD, Australia
16.1ct Natural Boulder Opal Pendant Rectangle Blue-Green
Original price was: AU$450.AU$382Current price is: AU$382.Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Dimensions: 26×8.5×5.5 mm
Whole Pendant Weight: 16.1 ct
(Size and weight are approximate)
Sterling Silver Rectangle Boulder Opal Ring 22 ct US 7
Original price was: AU$450.AU$382Current price is: AU$382.Opal: Natural, Solid, Untreated, Polished
Setting Dimensions: 19x14x5 mm
Whole Ring Weight: 22 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 (Size Change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Wood Fossil Boulder Opal Pendant 54ct
Original price was: AU$450.AU$382Current price is: AU$382.Opal 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
Wood Fossil Boulder Opal Pendant 35ct
Original price was: AU$450.AU$382Current price is: AU$382.35ct 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 34ct
Original price was: AU$450.AU$382Current price is: AU$382.34ct Australian wood fossil boulder opal pendant from Winton Queensland featuring vivid lime green and deep blue fire across its polished oval cabochon surface. Finished with a natural drilled hole and adjustable beige cord necklace. 100% natural and untreated, ideal for October birthstone jewelry.
Type: Natural solid boulder opal pendant
Material: Wood fossil boulder opal
Origin: Winton, Queensland, Australia
Weight: 34 carats
Dimensions: 30 x 19 x 5 mm approx
Color: Lime green and deep blue fire with polished brown ironstone
Cut / Shape: Oval cabochon
Necklace: Adjustable beige braided cord
Treatment: 100% natural untreated opal not a doublet or triplet
Wood Fossil Boulder Opal Pendant 52.5ct
Original price was: AU$450.AU$382Current price is: AU$382.💎 Opal Details:
Type: Natural, Solid, Untreated Polished Wood Fossil Boulder Opal
Origin: Queensland, Australia
Dimensions: 41.5 × 22 × 7.5 mm (approx.)
Weight: 52.5ct (approx.)
💎 Necklace Details:
Type: Adjustable Slide Knot Cord
Color: Brown
Boulder Opal Pendant 32ct
Original price was: AU$450.AU$382Current price is: AU$382.Type: 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
Koroit Boulder Opal Pendant 48ct
Original price was: AU$450.AU$382Current price is: AU$382.Type: 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
39.17ct Double Sided Koroit Boulder Opal
AU$380100% Natural Polished Boulder Opal
Weight: 39.17 ct
Dimensions: 32x23x7 mm
Source: Koroit,QLD, Australia
78.76ct Large Boulder Opal Teardrop Veins
AU$380100% Natural Polished Boulder Opal
Weight: 78.76 ct
Dimensions: 45.5×22.5×8 mm
Source: Koroit,QLD, Australia
2.7ct Natural Faceted Crystal Opal Pair – Oval
AU$373💎 Opal Details:
Type: Natural, Solid, Untreated, Polished Faceted Crystal Opal
Origin: Lightning Ridge, NSW, Australia
Dimensions: 10 × 7 × 3.5 mm (each, approx.)
Total Weight: 2.7ctw (approx.)
Boulder Opal Splits Rubbed Rough Parcel 104g
AU$366Weight: 104 gram total weight
Dimensions: See ruler in image
Source: Winton and Koroit, QLD, Australia
Price: $260
Quantity: 4 Pieces
Description:
2 x Pipe Crystal Opals and 2 x Koroit Nuts Splits. Ideal for cutting and shaping into pairs. Opals are wet to show color and taken under LED Lighting. Price includes Worldwide Registered Shipping.
14.4ct Natural Boulder Opal Pink Green
AU$366Opal: Natural, Solid, Untreated, Polished
Color: Pink, Green
Shape: Freeform
Weight: 14.4 ct
Dimensions: 22x14x5mm
Source: Winton, QLD, Australia
Size and weight are approximate
0.42ct Natural Black Opal Oval Green Blue
AU$358Opal: Natural, Solid, Untreated, Polished
Dimensions: 7.4×4.9×2 mm
Weight: 0.42 ct
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
Sterling Silver Green Oval Boulder Opal Ring 35 ct US9
Original price was: AU$422.AU$358Current price is: AU$358.Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 22×14.5×7 mm approx
Whole Ring Weight: 35 ct approx
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm approx
Ring Size: US9 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
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.