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Sterling Silver Blue Purple Boulder Opal Ring 19 ct US 7
AU$563Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 19x11x5mm approx
Whole Ring Weight: 19 ct approx
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 (Size change is not available)
Note: Opal contains a minor hairline fracture
Sterling Silver Blue Rectangle Boulder Opal Ring 22 ct US 7
AU$563Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 16.5×11.5×4.5 mm approx
Whole Ring Weight: 22 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
Sterling Silver Blue Boulder Opal Ring 21.5 ct US 7 1/2
AU$563Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 20x16x4 mm approx
Whole Ring Weight: 21.5 ct approx
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm approx
Ring Size: US7 1/2 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
15.3ct Natural Boulder Opal Deep Purple Blue Fire
AU$563100% Natural Boulder Opal
Weight: 15.3 ct
Dimensions: 21.5x12x4.5 mm
Source: Winton, QLD, Australia
33ct Double Sided Natural Koroit Boulder Opal
AU$563100% Natural, Untreated, Polished
Dimensions : 26x23x7 mm
Weight: 33 ct
Source: Koroit, QLD, Australia
(Size and weight are approximate)
Boulder Opal Rubs Rough Parcel 4 Piece 80g
Original price was: AU$741.AU$556Current price is: AU$556.Weight: 80 grams total weight
Dimensions: See ruler in image
Quantity: 4 Pieces
Source: Winton, QLD, Australia
Price: $520
Description: Opal rubs are wet to show color and taken under LED lighting. Price includes Worldwide Shipping with Insurance.
Wood Fossil Boulder Opal Pendant 95ct
AU$55695ct Australian Boulder Opal pendant from Winton displays vivid blue, green, and white opal patterns through natural wood fossil matrix. Polished freeform cut with brown adjustable necklace, this natural untreated gemstone pendant is ideal for daily wear, gifting, and meaningful October birthstone jewelry.
Type: Natural Solid Boulder Opal Pendant
Origin: Winton, Queensland Australia
Dimensions: 50x30x8 mm (approx.)
Weight: 95 ct (approx.)
Color: Blue green fire with white opal and wood fossil matrix
Cut/Shape: Polished freeform pendant
Necklace: Brown adjustable cord, ready to wear
Treatment: 100% natural untreated opal (not a doublet or triplet)
33.5ct Natural Boulder Opal Pendant Blue Green fire
AU$54933.5ct natural wood replacement boulder opal pendant from Winton, Queensland, Australia, vivid blue and green fire in rich brown ironstone. 100% natural, untreated gemstone necklace, ideal for October birthstone jewelry and opal collectors.
Sterling Silver Blue Green Boulder Opal Ring 24.5ct US7
AU$549Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 21.5×10.5×4 mm approx
Whole Ring Weight: 21.5 ct approx
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm approx
Ring Size: U7 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
9.5ct Natural Boulder Opal Blue Green
AU$549Opal: Natural, Solid, Untreated, Polished
Source: Winton, QLD, Australia
Dimensions: 17x17x4mm
Weight: 9.5 ct
Color: Blue, Green
Shape: Freeform (Triangular)
(Size and weight are approximate)
2.2ct Natural Black Opal Blue Fire
AU$549100% Natural Solid Black Opal Polished Stone
Weight: 2.20 ct
Dimensions: 12.5×7.5×4 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Partially Transparent
35.3ct Silver Boulder Opal Pendant Brown Koroit Vein Pattern
AU$542Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Koroit, Queensland, Australia
Dimensions: 29×22.5×4.5mm
Whole Pendant Weight: 35.3 ct
(Size and weight are approximate)
Silver Australian Boulder Opal Pendant with Necklace 18 ct
AU$542Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Dimensions: 26x9x4.5 mm
Whole Pendant Weight: 18 ct
(Size and weight are approximate)
7.2ct Crystal Boulder Opal
AU$5427.2ct Australian Crystal Boulder Opal from Queensland reveals green fire glowing through translucent natural opal body. Expertly polished in oval cabochon cut, 100% natural and untreated, this gemstone is ideal for jewelry design, October birthstone, or collection.
Type: Natural Solid Crystal Boulder Opal
Origin: Queensland, Australia
Dimensions: 15.9 × 12.5 × 5.6 mm (approx.)
Weight: 7.2 carats (approx.)
Color: Green fire through translucent body tone
Cut/Shape: Oval cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
Sterling Silver Purple Boulder Opal Ring 23.5 ct US 8
AU$542Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 18.5x14x5 mm
Whole Ring Weight: 23.5 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US8 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
4.5ct Natural Faceted Crystal Opal Pair – Oval
AU$542
Opal Details:
Type: Natural, Solid, Untreated, Faceted Crystal Opal
Origin: Lightning Ridge, NSW, Australia
Dimensions: 12x10x3.5 mm each (approx.)
Weight: 4.5ct total (approx.)
Large Koroit Boulder Opal Pendant 86ct
AU$542Type: Natural Solid Untreated Boulder Opal
Origin: Koroit, Queensland, Australia
Dimensions: 44 × 27 × 10 mm approx
Weight: 86ct approx
Color: Rainbow sparkling fire including red green and blue in ironstone matrix
Necklace: Black rope length adjustable gift ready
Use: Unisex pendant daily wear or collector jewelry
0.8ct Black Crystal Opal Heart – Blue and Violet Fire
AU$534Opal Details:
Type: Natural, Solid, Untreated Black Crystal Opal
Origin: Lightning Ridge, Australia
Dimensions: 7×8.4×2.5mm (approx.)
Weight: 0.8ct (approx.)
Sterling Silver Australian Boulder Opal Ring 23 ct US 8
AU$534Ring Size: US8 (Size Change is not available)
Opal: Natural, Solid, Untreated, Polished
Setting Dimensions: 22×12.5×5.5 mm
Whole Ring Weight: 23 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Sterling Silver Freeform Boulder Opal Ring 22 ct US 8
AU$534Opal: Natural, Solid, Untreated, Polished
Setting Dimensions: 24.5x11x4 mm
Whole Ring Weight: 22.5 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US8 (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.