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3.73ct Natural Crystal Opal Lightning Ridge
AU$2,024100% Natural Australian Opal, Untreated, Polished
Dimensions: 15.5x12x4.5 mm
Weight: 3.73 ct
Source: Lightning Ridge, NSW, Australia
(Size and weight are approximate)
34.7ct Natural Boulder Opal Winton Electric Blue
AU$2,024Natural Solid Untreated Australian Boulder Opal Polished Stone
Weight: 34.7 carats
Dimensions: 34.5×19.5×6 mm
Source: Winton, QLD, Australia
Size and weight are approximate
4.76ct Natural Dark Opal Lightning Ridge
AU$2,003100% Natural Dark Opal (Semi Black Opal)
Weight: 4.76 ct
Dimensions: 14x11x4 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
5.11ct Black Opal Electric Blue
AU$1,9821.90ct solid Australian dark opal from Lightning Ridge featuring vivid rainbow fire with red, green, blue, cyan, and violet flashes. Polished elongated oval cabochon cut ideal for an elegant opal ring or pendant. Natural untreated October birthstone gemstone with refined brilliance.
Type: Natural Solid Dark Opal
Origin: Lightning Ridge, New South Wales, Australia
Weight: 1.90ct
Dimensions: approx. 12.5 x 6.9 x 3.0mm
Color: Vivid rainbow fire with red, green, blue, cyan, and violet
Cut / Shape: Oval cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
1.97ct Natural Dark Opal Rolling Rainbow Fire
AU$1,968Natural Solid Untreated Australian Dark Opal / Semi Black Opal Polished Stone
Weight: 1.97 carat
Dimensions: 11x9x3 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
13.9ct Natural Boulder Opal Wood Fossil
AU$1,968Natural Solid Untreated Australian Boulder Opal Polished Stone
Weight: 13.9 carats
Dimensions: 25.5x16x4mm
Source: Winton, QLD, Australia
Size and weight are approximate
1.59ct Natural Black Opal – Oval Neon Blue Fire
AU$1,912Opal Details:
Weight: 1.59 ct
Dimensions: 9×7.5×3 mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
13.74ct Natural Dark Opal – Rectangle Sparkling Muticolor Pinfire
AU$1,898Opal Details:
Type: Natural Solid Untreated Polished Dark Opal
Origin: Lightning Ridge Australia
Dimensions: 24.9×11.4×5.5mm (approx.)
Weight: 13.74ct (approx.)
Crystal Opal 2.33ct Calibrated 10x7mm / 9x6mm / 6x4mm
AU$1,828This calibrated crystal opal parcel from Coober Pedy, Australia features vivid neon flashes of orange, yellow, green, and blue. Polished teardrop and pear shapes in multiple sizes make this natural, untreated opal parcel ideal for fine jewelry setting and October birthstone designs.
Type: Natural Crystal Opal Calibrated Set
Origin: Coober Pedy South Australia
Total Weight: 2.33ctw approx
Stone Sizes: 1 piece 10 x 7 mm / 2 pieces 9 x 6 mm / 3 pieces 6 x 4 mm
Shape: Teardrop and pear polished cabochon
Color: Electric neon fire with orange, yellow, green, and blue flashes
Appearance: Crystal to semi crystal transparency
Treatment: 100% natural untreated opal not doublet or triplet
Suitable For: Pendant ring earrings matched jewelry designs
145ct Yowah Boulder Opal Specimen
AU$1,800Natural Solid Untreated Australian Boulder Opal Polished Stone
Dimension : 58x35x9 mm
Weight : 145 ct
Source : Yowah , Queensland, Australia
Size and weight are approximate
4.84ct Natural Black Opal Heart Neon Green
AU$1,792💎 Opal Details:
- Type: Natural, Solid, Untreated, Polished Black Opal
- Origin: Lightning Ridge, Australia
- Dimensions: 14 × 15 × 4 mm (approx.)
- Weight: 4.84ct (approx.)
2.31ct Natural Dark Opal Rainbow Fire
AU$1,792Opal: 100% Natural, Solid, Untreated, Polished
Source: Lightning Ridge, Australia
Dimensions: 11x10x2.5 mm
Weight: 2.31 ct
(Size and weight are approximate)
Black Opal Ring 18k Gold Bezel
Original price was: AU$2,109.AU$1,792Current price is: AU$1,792.Australian black opal ring featuring a natural solid Lightning Ridge opal set in 18k yellow gold. The polished gemstone displays vivid orange yellow green and blue fire, making this refined opal ring ideal for fine jewelry and October birthstone collectors.
Type: Natural Solid Black Opal Ring
Origin: Lightning Ridge New South Wales Australia
Opal: Natural solid untreated polished black opal
Opal Color: Orange yellow green and blue fire
Metal: 18k Australian yellow gold stamped 750
Total Weight: 14.82 ctw approx
Ring Size: US 7 approx
Treatment: 100 percent natural untreated opal not doublet or triplet
Suitable For: Fine jewelry opal ring October birthstone gift and statement wear
20.75ct Crystal Boulder Opal
AU$1,68720.75ct Australian crystal opal with pastel green and pink fire across its translucent body. Expertly polished triangular cabochon perfect for fine jewelry design, opal rings, or October birthstone collections. 100% natural and untreated Australian gemstone.
Type: Natural Solid Crystal Opal Gemstone
Origin: Queensland, Australia
Dimensions: 19.9 × 18.7 × 8.9 mm (approx.)
Weight: 20.75 carats
Color: Pastel green and pink fire with translucent body tone
Cut/Shape: Polished triangular cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
1.67ct Natural Black Opal Oval Green Fire
AU$1,6871.67ct solid black opal high dome cabochon from Lightning Ridge Australia. Natural untreated gemstone with bright green fire. Genuine untreated gemstone ideal for fine jewelry rings pendants or collector stone. October birthstone opal cabochon polished and ready to set.
Type: Natural Solid Black Opal (Untreated)
Origin: Lightning Ridge, Australia
Weight: 1.67ct
Dimensions: 10.4 x 6.2 x 3.8 mm
Shape: High Dome Cabochon
Color: Bright green fire on a dark body tone
Treatment: 100% natural, untreated (not a doublet or triplet)
4.72ct Natural Black Opal – Teardrop Deep Blue
AU$1,687Opal Details:
100% Natural Solid Black Opal Polished Stone
Weight: 4.72 ct
Dimensions: 14.5×10.5x5mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
Note: Partially transparent
16.5ct Solid Boulder Opal Heart – Electric Blue Green Fire
AU$1,687Opal Details:
Type: Natural, Solid, Untreated Boulder Opal
Origin: Winton, Queensland, Australia
Dimensions: 19.1×22.5×4.2mm (approx.)
Weight: 16.5ct (approx.)
7.3ct Natural Dark Opal Oval Stardust Pinfire
AU$1,687Opal Details:
- Type: Natural Dark Opal
- Origin: Lightning Ridge, Australia
- Dimensions: Approx. 18.2 × 13 × 4.3 mm
- Weight: Approx. 7.3ct
While the potch on the back of this opal may look like it; this opal is not a doublet. It is a full solid natural opal.
3.05ct Natural Black Opal Green Blue
AU$1,6873.05ct Lightning Ridge black opal loose stone with vivid blue and green fire. Natural solid cabochon ready to set into jewelry or add to a collection.
Opal: Natural Solid Untreated Black Opal
Origin: Lightning Ridge Australia
Dimensions: 12.7×8.7×4.2 mm approx
Weight: 3.05 ct approx
Color: Vivid blue and green fire on dark body tone
Cut Shape: Polished cabochon
Treatment: 100% natural untreated opal not a doublet or triplet
Green Oval Boulder Opal 32.8 ct
AU$1,687Natural Solid Untreated Australian Boulder Opal Polished Stone
Weight: 32.8 carats
Dimensions: 33.5x15x6 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.