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34.75ct Large Natural Koroit Boulder Opal
AU$319100% Natural Polished Boulder Opal
Weight: 34.75 ct
Dimensions: 38×22.5×7 mm
Source: Koroit,QLD, Australia
Sterling Silver Oval Boulder Opal Ring US6 3/4
Original price was: AU$373.AU$316Current price is: AU$316.Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 18x12x4.5 mm approx
Whole Ring Weight: 16 ct approx
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm approx
Ring Size: US6 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
1.4ct Crystal Opal Green Purple Blue
AU$3091.4ct Australian crystal opal with green purple and blue fire. 100% natural untreated and polished square cut cabochon. Ready to be set into rings pendants and fine jewelry. A radiant October birthstone gemstone perfect for custom designs.
Type: Natural solid crystal opal (Pipe Opal)
Origin: Queensland, Australia
Dimensions: 8.1 x 8.4 x 2.6 mm
Weight: 1.4ct
Color: Vibrant green purple blue fire
Cut/Shape: Freeform cabochon
Treatment: 100 percent natural untreated opal, not a doublet or triplet
1.78ct Crystal Opal Green Blue Fire
AU$3091.78ct Australian crystal opal bright green blue and purple fire polished freeform shape. 100% Natural and untreated, this shimmering gemstone is ideal for fine jewelry including rings and pendants, and is perfect for October birthstone lovers and opal collectors.
Type: Natural solid crystal opal gemstone
Origin: Australia
Dimensions: 14.2 x 6.8 x 3 mm
Weight: 1.78ct
Color: Bright green blue purple fire, pastel body tone
Cut/Shape: Freeform polished cut
Treatment: 100% natural untreated opal, not a doublet or triplet
14.43ct Boulder Opal Purple Blue
AU$309100% Natural Boulder Opal
Weight: 14.43 ct
Dimensions: 31×11.5×4.5 mm
Source: Winton, QLD, Australia
0.7ct Natural Crystal Opal Lightning Ridge
AU$305100% Natural Lightning Ridge Crystal Opal
Weight: 0.7 ct
Dimensions: 7x5x2.2 mm
Source: Lightning Ridge, NSW, Australia
1.57ct Natural Boulder Opal
AU$302100% Natural Solid Boulder Opal Polished Stone
Weight: 1.57 ct
Dimensions: 12x6x2 mm
Source: Winton,QLD, Australia
Size and weight are approximate
3.03ct Natural Boulder Opal
AU$302100% Natural Solid Boulder Opal Polished Stone
Weight: 3.03 ct
Dimensions: 19×6.5×2.2 mm
Source: Winton,QLD, Australia
Size and weight are approximate
22.3ct Silver Boulder Opal Pendant Oval Brown Koroit Vein
Original price was: AU$351.AU$299Current price is: AU$299.Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Koroit, Queensland, Australia
Dimensions: 29×12.5×5.5mm
Whole Pendant Weight: 22.3 ct
(Size and weight are approximate)
Opal Doublet Parcel Calibrated 5×2.5mm
AU$295Opal doublet calibrated marquise set displays vivid neon Greenl and blue fire across deep body tones. Perfectly matched for custom earrings or fine jewelry.
Stone Type: Australian Opal Doublet
Size: 5 x 2.5 mm approx (calibrated)
Total Weight: 1.58 ctw approx
Origin: Coober Pedy, Australia
Suitable For: Earrings, rings, pendants, custom jewelry
Opal Doublet Parcel Calibrated 5×2.5mm
AU$295Opal doublet calibrated marquise set displays vivid neon Greenl and blue fire across deep body tones. Perfectly matched for custom earrings or fine jewelry.
Stone Type: Australian Opal Doublet
Size: 5 x 2.5 mm approx (calibrated)
Total Weight: 1.58 ctw approx
Origin: Coober Pedy, Australia
Suitable For: Earrings, rings, pendants, custom jewelry
Boulder Opal Pendant 66 ct
Original price was: AU$337.AU$287Current price is: AU$287.66ct Australian Boulder Opal pendant from Winton shows bright purple fire glowing through its natural ironstone body. Polished rectangular freeform cut and finished with a black adjustable necklace, it is ready for daily wear or gifting. Natural untreated opal ideal for October birthstone jewelry.
Type: Natural Solid Boulder Opal Pendant
Origin: Winton, Queensland Australia
Dimensions: 34.5×23×8.5 mm approx
Weight: 66 carats approx
Color: Bright purple fire with rich brown ironstone
Cut/Shape: Polished rectangular freeform, drilled
Necklace: Black adjustable cord, ready to wear
Treatment: 100 percent natural untreated opal (not a doublet or triplet)
Sterling Silver Solid Teardrop Pipe Boulder Opal Ring 20 ct US 6 3/4
Original price was: AU$330.AU$281Current price is: AU$281.Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 22x14x4.5 mm approx
Whole Ring Weight: 20 ct approx
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm approx
Ring Size: US6 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Boulder Opal Pendant 17ct
Original price was: AU$330.AU$281Current price is: AU$281.17ct Australian wood fossil boulder opal pendant necklace featuring vivid turquoise, green, and blue fire. Smooth polished surface with organic ironstone pattern, set on a beige color adjustable cord. 100% natural and untreated opal, perfect for October birthstone jewelry and everyday wear.
Type: Natural solid wood fossil boulder opal pendant
Origin: Australia
Weight: 17 ct
Dimensions: 27 x 11 x 5 mm
Color: Vivid turquoise, green, and blue fire
Pattern: Wood fossil ironstone matrix
Cut Shape: Polished elongated cabochon
Necklace: Beige adjustable cord necklace
Treatment: 100% natural untreated opal, not a doublet or triplet
3.48ct Natural Boulder Opal Vivid Blue Green Fire
AU$281💎 Opal Details:
Carat Weight: 3.48ct
Dimensions: 20 × 6 × 3 mm
Type: Natural Solid Boulder Opal
Source: Winton, QLD, Australia
Size & Weight: Approximat
Boulder Opal Pendant 176ct
Original price was: AU$323.AU$276Current price is: AU$276.176ct Solid Boulder Opal pendant necklace from Winton, Queensland, Australia. Blue veins across a natural brown matrix. Black adjustable necklace 100% natural untreated Opal ready to wear jewelry perfect for collectors and opal lovers.
Wood Fossil Boulder Opal Pendant 16 ct
Original price was: AU$323.AU$276Current price is: AU$276.16ct Australian wood fossil boulder opal pendant featuring vivid blue and green fire flowing through natural ironstone. Polished elongated cabochon with a drilled hole, paired with a beige adjustable cord. 100% natural and untreated, ideal for October birthstone jewelry and everyday wear.
Opal Type: Natural Solid Wood Fossil Boulder Opal
Origin: Australia
Weight: 16 carats
Dimensions: 27 x 12 x 6 mm (approx.)
Color: Vivid blue and green fire with natural brown ironstone
Pattern: Wood fossil structure with flowing opal seam
Cut / Shape: Elongated cabochon, polished
Pendant Style: Drilled hole, ready to wear
Necklace: Beige adjustable cord necklace
Treatment: 100% natural, untreated opal (not a doublet or triplet)
Wood Fossil Boulder Opal Pendant 30ct
Original price was: AU$323.AU$276Current price is: AU$276.Dimensions: 31 × 19.5 × 6 mm approx.
Weight: 30ct approx.
Origin: Winton, QLD, Australia
Type: Natural, Solid, Untreated, Polished
Necklace: Adjustable Cream Color Rope
Boulder Opal Pendant 36ct
Original price was: AU$323.AU$276Current price is: AU$276.36ct Solid Boulder Opal pendant necklace from Winton Queensland Australia shows vivid blue purple and green fire. 100% natural untreated and ethically sourced ready to wear jewelry perfect for collectors and opal lovers.
2.36ct Natural Faceted Crystal Opal Pair – Round
AU$274Opal Details:
Type: Natural, Solid, Untreated, Faceted Crystal Opal
Origin: Lightning Ridge, NSW, Australia
Dimensions: 7x7x4 mm each (approx.)
Weight: 2.36ct total (approx.)
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.