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7.7ct Natural Boulder Opal
AU$599Opal: Natural, Solid, Untreated, Polished
Color: Green, Blue, Pink
Shape: Freeform (Marquis)
Weight: 7.7 ct
Dimensions: 30x8x4.5mm
Source: Winton, QLD, Australia
Size and weight are approximate
1.75ct Natural Crystal Boulder Opal
AU$599100% Natural Solid Crystal Opal Polished Stone
Weight: 1.75 ct
Dimensions: 10.5x7x3 mm
Source: Queensland, Australia
Size and weight are approximate
Transparent
22.68ct Double Sided Natural Koroit Boulder Opal
AU$599100% Natural Polished Boulder Opal
Weight: 22.68 ct
Dimensions: 36×17.5×3.5 mm
Source: Koroit,QLD, Australia
23.11ct Natural Boulder Opal Deep Blue Fire
AU$599100% Natural Boulder Opal
Weight: 23.11 ct
Dimensions: 29.5x17x5 mm
Source: Winton, QLD, Australia
12.47ct Natural Australian Crystal Boulder Opal
AU$599Natural Solid Untreated Australian Pipe Crystal Boulder Opal Polished Stone
Weight: 12.47 carats
Dimensions: 18x12x.6.5 mm
Source: Winton, QLD, Australia
Size and weight are approximate
Set of 2 Opal Pendants Hand Carved Mauri Voodoo Face Design
AU$599Natural Solid Untreated Australian Boulder Opal Polished Stone with Adjustable Necklace
Weight: 125 carats each
Dimensions: 49x25x10mm
Source: Winton, QLD, Australia
Size and weight are approximate
34.5ct Boulder Opal Pendant Chocolate w/ Rainbow Vein
AU$599Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Koroit, Queensland, Australia
Dimensions: 30x17x6mm
Whole Pendant Weight: 34.5 ct
(Size and weight are approximate)
Sterling Silver Aqua Blue Boulder Opal Ring US 7 3/4
AU$570Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 21×12.5×5 mm
Whole Ring Weight: 23.5 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
Sterling Silver Blue Triangle Boulder Opal Ring 17 ct US 7
AU$570Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 14x14x5 mm approx
Whole Ring Weight: 17 ct approx
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm approx
Ring Size: US7 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
1.8ct Crystal Opal Parcel 6pcs Calibrated 8x5mm
AU$5701.8ctw Calibrated crystal opal parcel from Coober Pedy, Australia featuring six matched pear cabochons with brilliant red, green, and blue fire. Precisely cut for easy jewelry setting, this natural untreated crystal opal parcel is ideal for earrings, pendants, and fine October birthstone jewelry designs.
Type: Natural Solid Crystal Opal Parcel
Origin: Coober Pedy, South Australia, Australia
Quantity: 6 pieces
Total Weight: 1.8ct approx
Dimensions: 8 x 5 x 1.3mm each approx
Color: Brilliant red, green, and blue fire with translucent crystal body tone
Cut Shape: Calibrated pear cabochon
Use: Easy to set for earrings, pendants, or fine jewelry
Treatment: 100% natural, untreated crystal opals (not doublets or triplets)
Half Moon Natural Boulder Opal 11.3 ct
AU$570Opal: Natural,Solid,Untreated, PolishedÂ
Weight: 11.3 ct
Dimensions: 25x12x5 mm
Source: Winton, QLD, Australia
(Size and weight are approximate)
30.5ct Silver Boulder Opal Pendant Blue Green Fire
AU$57030.5ct solid boulder opal silver pendant from Winton, Queensland, Australia, shows vivid blue and green fire. 100% natural, untreated gemstone, perfect for statement opal jewelry and collectors.
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Type: Natural Solid Boulder Opal Silver Pendant
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Origin: Winton, Queensland, Australia
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Dimensions: 22 × 21 × 7 mm approx.
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Weight: 30.5ct approx.
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Color: Vivid blue and green fire with ironstone matrix
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Setting: S925 stamped sterling silver pendant
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Necklace: Ready to wear, gift ready
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Treatment: 100% natural, untreated (not a doublet or triplet)
Silver Koroit Boulder Opal Pendant Necklace 49 ct
AU$57049ct solid Koroit boulder opal silver pendant from Queensland Australia showing bright green and blue fire. 100% natural untreated gemstone jewelry perfect for collectors and October birthstone gifts.
Type: Natural Solid Koroit Boulder Opal Silver Pendant
Origin: Koroit Queensland Australia
Dimensions: 27x21x8 mm approx
Weight: 49 ct approx
Color: Bright green and blue fire with ironstone matrix
Cut/Shape: Oval cabochon polished
Setting: S925 rhodium plated sterling silver
Treatment: 100% natural untreated opal
Silver Purple Boulder Opal Pendant with Necklace 78 ct
AU$570Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Koroit, Queensland, Australia
Dimensions: 50x30x5.5mm
Whole Pendant Weight: 78 ct
(Size and weight are approximate)
19.5ct Boulder Opal Pendant Rectangle Blue-Green
AU$570Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Dimensions: 24.5×11.5×4.5 mm
Whole Pendant Weight: 19.5 ct
(Size and weight are approximate)
Silver Australian Boulder Opal Pendant with Necklace 22.1 ct
AU$570Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Dimensions: 26.5×12.7×4.7 mm
Whole Pendant Weight: 22.1 ct
(Size and weight are approximate)
1.29ct Dark Opal Heart
AU$5631.29ct Australian semi black opal heart from Lightning Ridge features vivid orange yellow green and blue fire across its polished surface. Cut in a romantic heart shape, this natural untreated opal is ideal for rings or pendants and a meaningful October birthstone gemstone.
Type: Natural solid semi black opal / Dark Opal
Origin: Lightning Ridge, NSW, Australia
Weight: 1.29 ct
Dimensions: 7.6 × 9.3 × 3.1 mm approx
Color: Orange yellow green blue fire
Cut Shape: Heart cabochon
Treatment: 100% natural untreated opal (not a doublet or triplet)
Use: Ring stone, pendant stone, custom jewelry, collector gemstone
1.25ct Natural Black Opal Green Blue
AU$563💎 Opal Details:
- Type: Natural, Solid, Untreated Black Opal
- Origin: Lightning Ridge, Australia
- Dimensions: 10.2×6.8×3 mm
- Weight: 1.25ct
1ct Natural Black Opal Lightning Ridge
AU$563Opal Details:
Type: Natural Black Opal
Origin: Lightning Ridge, Australia
Dimensions: 8x8x2.2 mm approx
Weight: 1ct approx
Boulder Opal Ring 30ct Sterling Silver US9
AU$563Deep purple and electric blue fire define this natural Australian boulder opal ring. Large rectangular bezel set in sterling silver, perfect for a bold statement and October birthstone jewelry.
Ring Size: US9 (size change not available)
Dimensions: 19 x 15 x 5.5 mm approx.
Weight: 30ct approx. (whole ring)
Origin: Queensland, Australia
Opal Type: Natural Solid Boulder Opal
Treatment: None (100% natural, not a doublet or triplet)
Metal: S925 sterling silver, rhodium plated
Ring Band: 3.5 mm
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.