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2ct Crystal Boulder Opal
AU$3912ct Australian crystal opal from Queensland with soft translucent body tone and gentle pastel color. Expertly polished into an oval cabochon, 100% natural and untreated gemstone perfect for fine jewelry, October birthstone gifts, or collectors.
Type: Natural Solid Crystal Opal
Origin: Queensland, Australia
Dimensions: 10.4 × 7.7 × 3.9 mm (approx.)
Weight: 2.0 ct (approx.)
Color: Soft translucent pastel tone
Cut/Shape: Oval cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
1.94ct Natural Black Opal Round Blue & Green Fire
AU$391Opal Details:
- Type: Natural Black Opal
- Origin: Lightning Ridge, Australia
- Dimensions: 9.7 × 9.4 × 3 mm
- Weight: 1.94ct
Wood Fossil Boulder Opal Pendant 23ct
AU$39123ct Australian wood fossil boulder opal pendant necklace featuring vivid green, yellow, and blue fire within natural fossilized ironstone matrix. Polished elongated cabochon with a natural drilled hole, ready to wear on a beige adjustable cord necklace. 100% natural and untreated October birthstone jewelry.
Stone Type: Natural Solid Wood Fossil Boulder Opal
Style: Pendant Necklace
Weight: 23 carat
Dimensions: 35 x 11 x 5 mm (approx.)
Origin: Winton, Queensland, Australia
Matrix: Fossilized wood ironstone
Fire Color: Green, yellow, and blue fire
Cut Shape: Polished elongated cabochon (not freeform)
Necklace: Beige adjustable cord necklace, ready to wear
Treatment: 100% natural, untreated opal (not a doublet or triplet)
Crescent Moon Crystal Opal 1.52 ct
AU$391Natural Solid Untreated Crystal Opal Polished Stone
Weight: 1.52 carats
Dimensions: 18x7x2 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Boulder Opal Pendant Necklace 56.4 ct
AU$391Type: Natural solid boulder opal pendant necklace
Origin: Winton Queensland Australia
Dimensions: 35.4 x 23.6 x 6.4 mm
Weight: 56.4ct approx
Color: flashes of blue and cyan fire with ironstone
Cut and Shape: polished freeform drilled
Necklace: adjustable brown cord
Treatment: 100 percent natural untreated opal not a doublet or triplet
Purple Striped Boulder Opal 28.1 ct
AU$391Natural Solid Untreated Australian Boulder Opal Polished Stone
Weight: 28.1 carat
Dimensions: 27×19×5.5 mm
Source: Winton, QLD, Australia
Boulder Opal Pendant 137ct
AU$391This 137ct natural solid boulder opal pendant features a bold Tribal Leaf carving across polished brown ironstone with glowing opal veins. Handcrafted in Winton Australia, it is designed as men’s opal jewelry and a unisex opal pendant, ready to wear on an adjustable leather cord.
Type: Natural Solid Boulder Opal Pendant
Origin: Queensland, Australia
Weight: 137ct approx.
Dimensions: 62 × 20 × 9 mm approx.
Color: Blue veins with brown ironstone body
Cut/Shape: Rectangular freeform, hand carved tribal leaf design
Necklace: Genuine Greek leather adjustable necklace, ready to wear
Treatment: 100% natural, untreated opal (not a doublet or triplet)
Wood Fossil Boulder Opal Pendant 58ct
AU$38458ct Australian wood fossil boulder opal pendant featuring vivid green blue and soft pink fire within natural ironstone and fossil patterns. Polished freeform cabochon with drilled hole, paired with a brown adjustable cord necklace. 100% natural and untreated October birthstone opal.
Type: Natural Solid Boulder Opal Pendant
Material: Wood Fossil Boulder Opal
Origin: Queensland, Australia
Weight: 58 ct
Dimensions: 46 x 19 x 7 mm approx.
Color: Green blue pink fire with fossil wood pattern
Cut Shape: Freeform polished cabochon
Hole: Naturally drilled
Necklace: Brown adjustable cord necklace included
Treatment: 100% natural untreated opal not a doublet or triplet
39.17ct Double Sided Koroit Boulder Opal
AU$384100% Natural Polished Boulder Opal
Weight: 39.17 ct
Dimensions: 32x23x7 mm
Source: Koroit,QLD, Australia
78.76ct Large Boulder Opal Teardrop Veins
AU$384100% Natural Polished Boulder Opal
Weight: 78.76 ct
Dimensions: 45.5×22.5×8 mm
Source: Koroit,QLD, Australia
Boulder Opal Pendant 16.6ct
AU$384Type: Natural Solid Untreated Boulder Opal
Origin: Queensland, Australia
Dimensions: 25.5 × 12 × 5 mm approx
Weight: 16.6ct approx
Color: White base with bright green, pink, and blue fire
Shape: Polished pendant with adjustable black cord
Large Boulder Opal Pendant 187ct
AU$384187ct Australian Boulder Opal pendant featuring vivid blue and green fire flowing through natural ironstone patterns. Expertly polished with a bold geometric shape and set on a genuine Greek leather adjustable necklace. A natural untreated opal ideal for daily wear, gifting, and meaningful October birthstone jewelry.
Type: Natural Solid Boulder Opal Pendant
Origin: Winton, Queensland, Australia
Dimensions: 68x35x11 mm (approx.)
Weight: 187 ct (approx.)
Color: Blue and green fire with rich brown ironstone
Cut/Shape: Large geometric freeform polished pendant
Necklace: Genuine Greek leather adjustable necklace
Treatment: 100% natural untreated opal (not a doublet or triplet)
Sterling Silver Oval Boulder Opal Ring US6 3/4
AU$377Opal: 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
2.7ct Natural Faceted Crystal Opal Pair – Oval
AU$377💎 Opal Details:
Type: Natural, Solid, Untreated, Polished Faceted Crystal Opal
Origin: Lightning Ridge, NSW, Australia
Dimensions: 10 × 7 × 3.5 mm (each, approx.)
Total Weight: 2.7ctw (approx.)
Boulder Opal Splits Rubbed Rough Parcel 104g
AU$369Weight: 104 gram total weight
Dimensions: See ruler in image
Source: Winton and Koroit, QLD, Australia
Price: $260
Quantity: 4 Pieces
Description:
2 x Pipe Crystal Opals and 2 x Koroit Nuts Splits. Ideal for cutting and shaping into pairs. Opals are wet to show color and taken under LED Lighting. Price includes Worldwide Registered Shipping.
14.4ct Natural Boulder Opal Pink Green
AU$369Opal: Natural, Solid, Untreated, Polished
Color: Pink, Green
Shape: Freeform
Weight: 14.4 ct
Dimensions: 22x14x5mm
Source: Winton, QLD, Australia
Size and weight are approximate
0.42ct Natural Black Opal Oval Green Blue
AU$362Opal: Natural, Solid, Untreated, Polished
Dimensions: 7.4×4.9×2 mm
Weight: 0.42 ct
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
7.52ct Natural Boulder Opal Blue Fire
AU$362100% Natural Solid Boulder Opal Polished Stone
Weight: 7.52 ct
Dimensions: 12×12.5×5.5 mm
Source: Winton,QLD, Australia
Size and weight are approximate
1.47ct Crystal Boulder Opal
AU$3551.47ct Australian crystal opal with soft blue and green fire polished oval cabochon. 100% Natural and untreated, ideal for fine opal jewelry, ring settings, and October birthstone gifts.
Type: Natural solid crystal opal gemstone
Origin: Australia
Dimensions: 11.7 x 7.5 x 2.8 mm
Weight: 1.47ct
Color: Soft blue and green fire
Cut/Shape: Oval cabochon
Treatment: 100 percent natural, untreated, not a doublet or triplet
18.44ct Natural Boulder Opal Deep Purple Fire
AU$355100% Natural Boulder Opal
Weight: 18.44 ct
Dimensions: 28x15x5 mm
Source: Winton, QLD, Australia
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.