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4mm Round Calibrated Opal Doublet Parcel 3.5ct

AU$582

Australian opal doublet parcel 25pcs calibrated 4mm round. Bright multicolor fire with strong green, blue, orange, and yellow flashes in a calibrated 4mm round parcel. Ideal for rings, earrings, pendants, and matching jewelry sets. Consistent sizing for production or custom work.

Stone Type: Australian Opal Doublet
Size: 4mm round calibrated
Total Weight: 3.5ctw approx
Use: Rings, earrings, pendants, halo settings, fine jewelry work

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3.83ct Crystal Boulder Opal

AU$582

3.83ct Australian crystal boulder opal showing brilliant green fire with purple body. Natural and untreated gemstone perfect for fine jewelry or October birthstone collections.

Type: Natural Solid Crystal Boulder Opal (Pipe Opal)
Origin: Queensland, Australia
Dimensions: 13.8 × 8.4 × 4.7 mm (approx.)
Weight: 3.83 ct (approx.)
Color: Brilliant green and blue fire with pink undertones
Cut/Shape: Oval cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)

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1.1ct Crystal Boulder Opal

AU$582

1.1ct Australian crystal opal bright green fire with vivid lavender-blue. 100% Natural and untreated gemstone ideal for fine jewelry or October birthstone collectors.

Type: Natural Solid Crystal Opal (Crystal Boulder Opal)
Origin: Queensland, Australia
Dimensions: 10.5 × 7.5 × 2.6 mm (approx.)
Weight: 1.1 ct (approx.)
Color: Green fire with lavender-blue tone (appears magenta in camera)
Cut/Shape: Teardrop cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)

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7.7ct Natural Boulder Opal

AU$582

Opal: 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

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1.75ct Natural Crystal Boulder Opal

AU$582

100% Natural Solid Crystal Opal Polished Stone
Weight: 1.75 ct
Dimensions: 10.5x7x3 mm
Source: Queensland, Australia
Size and weight are approximate
Transparent

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23.11ct Natural Boulder Opal Deep Blue Fire

AU$582

100% Natural Boulder Opal
Weight: 23.11 ct
Dimensions: 29.5x17x5 mm
Source: Winton, QLD, Australia

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12.47ct Natural Australian Crystal Boulder Opal

AU$582

Natural 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

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Set of 2 Opal Pendants Hand Carved Mauri Voodoo Face Design

AU$582

Natural 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

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52.8 ct crocodile skin hand carved boulder opal pendant from Winton Australia with green opal seam in natural brown ironstone matrix
New
Natural green Australian boulder opal pendant shown worn on a black necklace with oval carved ironstone matrix and sterling silver setting

Silver Boulder Opal Pendant Hand Carved Crocodile Skin 52.8 ct

AU$582
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44.4 ct tribal hand carved boulder opal pendant from Winton Australia with blue green opal seam in natural brown ironstone matrix
New
4.4 ct Winton boulder opal pendant shown worn on a black necklace with blue green opal seam and tribal carved ironstone matrix

Silver Boulder Opal Pendant Tribal Hand Carved 44.4 ct

AU$582
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34.5ct Boulder Opal Pendant Chocolate w/ Rainbow Vein

AU$582

Pendant: 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)

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22.96 ct pink green and orange boulder opal pendant from Winton set in rhodium plated S925 sterling silver
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Pink Winton boulder opal pendant shown worn on a silver chain with green and orange color visible

Silver Boulder Opal Pendant 22.96 ct

AU$555

NN644
Silver Boulder Opal Pendant 22.96 ct
/silver-boulder-opal-pendant-22-96ct
22.96 ct
30.6×10.6×4.9 mm
Natural Solid Untreated Boulder Opal
Winton, QLD, Australia
Pink, Green, Orange
Rectangular/Square
Pendant: S925 Stamped Sterling Silver with Rhodium Plated

Select options This product has multiple variants. The options may be chosen on the product page
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30.5ct Silver Boulder Opal Pendant Blue Green Fire

AU$555

30.5ct 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.

  • Type: Natural Solid Boulder Opal Silver Pendant

  • Origin: Winton, Queensland, Australia

  • Dimensions: 22 × 21 × 7 mm approx.

  • Weight: 30.5ct approx.

  • Color: Vivid blue and green fire with ironstone matrix

  • Setting: S925 stamped sterling silver pendant

  • Necklace: Ready to wear, gift ready

  • Treatment: 100% natural, untreated (not a doublet or triplet)

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Silver Koroit Boulder Opal Pendant Necklace 49 ct

AU$555

49ct 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

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Silver Purple Boulder Opal Pendant with Necklace 78 ct

AU$555

Pendant: 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)

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19.5ct Boulder Opal Pendant Rectangle Blue-Green

AU$555

Pendant: 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)

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Silver Australian Boulder Opal Pendant with Necklace 22.1 ct

AU$555

Pendant: 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)

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Sterling Silver Aqua Blue Boulder Opal Ring US 7 3/4

AU$555

Opal: 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

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1.8ct Crystal Opal Parcel 6pcs Calibrated 8x5mm

AU$555

1.8ctw 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)

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Half Moon Natural Boulder Opal 11.3 ct

AU$555

Opal: Natural,Solid,Untreated, Polished 
Weight: 11.3 ct
Dimensions: 25x12x5 mm
Source: Winton, QLD, 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.