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39.4 ct green and blue boulder opal pendant from Winton Australia with teardrop shape and sterling silver setting
New
Green and blue Australian boulder opal pendant shown worn on a silver chain for illustrative styling reference

Silver Boulder Opal Pendant 39.4 ct

AU$776

NN648
Silver Boulder Opal Pendant 39.4 ct
/silver-boulder-opal-pendant-39-4ct
39.4 ct
36.8×18.3×5.6 mm
Natural Solid Untreated Boulder Opal
Winton, QLD, Australia
Green, Blue
Teardrop
Pendant: S925 Stamped Sterling Silver with Rhodium Plated

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Boulder Opal Ring Sterling Silver Size 7

AU$776

Accent Stone: Faceted Amethyst

Setting: Bezel set opal with prong set amethyst

Ring Size: US 7

Total Ring Weight: 13.4ctw

 

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1.95ct Natural Faceted Crystal Opal – Oval Green Blue

AU$776

Opal: Natural, Solid, Untreated, Faceted
Source: Andamooka, Australia
Dimensions: 11.7×8.1×4.8 mm
Weight: 1.95 ct
Color: Green, Blue
Shape: Oval
Size and Weight are approximate

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0.96ct Black Opal Heart – Vivid Green & Blue Fire

AU$763

Opal Details:

Type: Natural, Solid, Untreated Black Opal
Origin: Lightning Ridge, Australia
Dimensions: 7.1 × 10.1 × 2.2 mm (approx.)
Weight: 0.96ct (approx.)

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1.99ct Natural Black Opal Heart – Green & Violet Fire

AU$763

Opal Details:

Type: Natural, Solid, Untreated Black Opal

Origin: Lightning Ridge, Australia

Dimensions: 13.7 × 9.9 × 2.5 mm (approx.)

Weight: 1.99ct (approx.)

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Close view of 35.5 ct purple boulder opal pendant with natural brown ironstone matrix in sterling silver
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35.5 ct purple boulder opal pendant from Winton Australia shown worn on a black cord necklace

Silver Boulder Opal Pendant Purple 35.5 ct

AU$763
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62.7 ct purple wood fossil boulder opal pendant from Winton in S925 sterling silver on a white background
New
62.7 ct purple wood fossil boulder opal pendant shown worn on a silver necklace for illustrative styling reference

Silver Boulder Opal Pendant Wood Fossil 62.7 ct

AU$763

NN642
Silver Boulder Opal Pendant Wood Fossil 62.7 ct
/silver-boulder-opal-pendant-62-7ct
62.7 ct
37.4×18.1×7.7 mm
Natural Solid Untreated Boulder Opal
Winton, QLD, Australia
Purple
Rectangular/Square
Pendant: S925 Stamped Sterling Silver with Rhodium Plated

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18.7ct Winton boulder opal pendant with green and yellow pinfire pattern in S925 sterling silver setting on white background
New
18.7ct Winton pinfire boulder opal pendant shown worn on a fine silver necklace for illustrative styling reference

Silver Boulder Opal Pendant Pinfire Pattern 18.7 ct

AU$763

NN639
Silver Boulder Opal Pendant Pinfire Pattern 18.7 ct
/silver-boulder-opal-pendant-18-7ct
18.7 ct
28.3x12x4.5 mm
Natural Solid Untreated Boulder Opal
Winton, QLD, Australia
Green, Yellow
Teardrop
Pendant: S925 Stamped Sterling Silver with Rhodium Plated

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26.1ct Winton boulder opal pendant with vivid blue green and purple color in polished silver setting on white background
New
26.1ct Australian boulder opal pendant shown worn on a fine silver necklace for illustrative size and styling reference

Silver Boulder Opal Pendant 26.1 ct

AU$763

NN637
Silver Boulder Opal Pendant 26.1 ct
/silver-boulder-opal-pendant-26-1ct
550
26.1 ct
25.1×20.7×4.1 mm
Natural Solid Untreated Boulder Opal
Winton, QLD, Australia
Blue, Green
Freeform

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Sterling Silver Sparkling Boulder Opal Ring 24 ct US 7

AU$756

Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 18x17x5 mm
Whole Ring Weight: 24 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
Size and weight are approximate

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Boulder Opal Pendant Sterling Silver Necklace

AU$749

Type: Natural Solid Boulder Opal Necklace
Origin: Winton, Queensland, Australia
Weight: 23.3 ctw approx. including pendant and necklace
Dimensions: 11 x 18 x 3.2 mm approx
Color: ocean blue green
Shape: Elongated horizontal polished cabochon
Metal: 925 sterling silver pendant and necklace (stamped)
Chain: 18 inch (slightly adjustable)
Treatment: 100% natural untreated opal

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5ct Natural Boulder Opal Neon Blue Green Fire

AU$749

Opal: Natural, Solid, Untreated, Polished
Dimensions: 19x11x3.5mm
Source: Winton, QLD, Australia
Weight: 5 ct
Color: Blue, Purple
Shape: Freeform
Size and weight are approximate

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australian-boulder-opal-loose-gemstone-2ct-opal-galaxy
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Australian Boulder Opal Multicolor Fire 2ct

AU$735

Genuine Australian boulder opal features multicolor fire. Ready to make into a custom ring or jewelry design.
Dimensions: 11.5 mm x 7.2 mm x 3.4 mm
Type: Solid Natural Boulder Opal
Origin: Winton, Queensland, Australia
Weight: 2ct
Treatment: 100% natural untreated opal (not a doublet or triplet)

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10x8mm + 7x5mm Crystal Opal Calibrated 2.4ct

AU$735

Australian crystal opal calibrated parcel from Coober Pedy featuring three polished oval cabochons with vivid pink orange yellow green cyan and blue fire. This matching set includes one larger and two smaller stones, ideal for ring and earring designs or professional jewelry making.

Type: Natural Crystal Opal Calibrated Parcel
Origin: Coober Pedy South Australia
Total Weight: 2.4 ctw
Stone Sizes:1 piece 10 x 8 mm and 2 pieces 7 x 5 mm
Cut: Oval Polished cabochon calibrated
Color: Bright pink orange yellow green cyan and blue fire
Treatment: 100 percent natural untreated opal not doublet or triplet
Suitable For: Ring earrings pendant matching sets and professional jewelry making

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Opal Doublet 12.4ct Red Multicolor Fire

AU$728

Type: Australian Opal Doublet
Size: 39 × 11.4 × 3.3 mm
Weight: 12.4ctw approx
Origin: Australia
Suitable For: Rings, pendants, earrings, custom jewelry

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4.63ct Natural Black Opal Oval Blue Green

AU$728

Type: Natural solid black opal
Origin: Lightning Ridge, Australia
Dimensions: 19.6 × 8.2 × 4 mm (approx.)
Weight: 4.63ct (approx.)
Treatment: 100% natural, untreated (not a doublet or triplet)
October birthstone gemstone
Please note: camera may show slight magenta tones, but the opal appears blue to the eye.

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Boulder Opal Ring 27ct Sterling Silver US8

AU$728

Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 23x15x6 mm approx
Whole Ring Weight: 27 ct approx
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm approx
Ring Size: U8 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver

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85.3 ct purple picture boulder opal pendant from Winton Australia set in rhodium plated S925 sterling silver
New
85.3 ct purple picture boulder opal pendant from Winton Australia shown worn on a black necklace

Silver Boulder Opal Pendant Purple Picture Stone 85.3 ct

AU$728
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58 ct purple boulder opal pendant from Winton Australia with natural brown matrix and sterling silver setting
New
58 ct Winton purple boulder opal pendant shown worn on a black necklace with natural matrix and silver setting

Silver Boulder Opal Pendant 58 ct

AU$721
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86ct Boulder Opal Pendant Teardrop Multicolor Flash

AU$721

Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Koroit, Queensland, Australia
Dimensions: 46x29x8mm
Whole Pendant Weight: 86 ct
(Size and weight are approximate)

Necklace Details:

• Type: Adjustable Slide Knot Cord

• Color: Black (or as preferred)

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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.