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Sterling Silver Oval Green Boulder Opal Ring 18 ct US 7
AU$234Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 17x9x5 mm approx
Whole Ring Weight: 18 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
4.31ct Natural Boulder Opal Vivid Blue Green
AU$2344.31ct Australian boulder opal from Winton Queensland features vivid blue and green fire glimmering across its natural ironstone body. Expertly polished in a curved freeform shape, this 100% natural untreated gemstone is ideal for fine jewelry, October birthstone gifts, or collector investment.
Type: Natural Solid Boulder Opal
Origin: Winton, Queensland, Australia
Dimensions: 19 x 6 x 3 mm (approx.)
Weight: 4.31ct (approx.)
Color: Vivid blue and green fire with natural ironstone matrix
Cut/Shape: Curved freeform polished cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
32ct Natural Boulder Matrix Opal Koroit Australia
AU$234Opal Details:
Type: Natural, Solid, Untreated Boulder Opal
Origin: Koroit, Queensland, Australia
Dimensions: 39 × 12 × 6.5 mm (approx.)
Weight: 32ct (approx.)
Boulder Opal Pendant 86ct Green Blue Flash
AU$234Large 86ct Koroit boulder opal pendant with vivid blue and green fire veins in rich brown ironstone. Solid, double sided and untreated, ready to wear on adjustable leather cord necklace.
Dimensions: 36 × 26 × 9 mm approx
Weight: 86 ct approx
Origin: Koroit, Queensland Australia
Opal Type: Natural Solid Boulder Opal
Finish: Double sided polished
Necklace: Brown Greek leather cord, sliding adjustable
Treatment: None, 100% natural untreated opal
Additional custom lighting or photo requests are not available.
Boulder Opal Pendant 18 ct
AU$234Type: Natural Solid Untreated Polished Boulder Opal
Origin: Winton, Queensland, Australia
Dimensions: 24.7 × 15.7 × 5.3 mm approx
Weight: 18ct approx
Color: Soft pastel rainbow fire of pink, green, blue, and hints of orange
Necklace: Adjustable genuine Greek leather cord
Wood Fossil Boulder Opal Pendant 17ct
AU$22717ct Australian wood fossil boulder opal pendant from Winton, Queensland featuring vivid turquoise, blue and green fire through natural ironstone matrix. Polished cabochon with a natural drilled hole, paired with a beige adjustable cord. 100% natural and untreated, ideal for October birthstone jewelry.
Type: Natural solid wood fossil boulder opal pendant
Origin: Winton, Queensland, Australia
Weight: 17 ct
Dimensions: 19 x 17 x 6 mm (approx.)
Color: Turquoise, blue and green fire with ironstone matrix
Cut Shape: Polished cabochon, drilled
Necklace: Beige adjustable braided cord
Treatment: 100% natural, untreated opal (not a doublet or triplet)
Boulder Opal Pendant 68ct
AU$22068ct Solid Boulder Opal pendant from Queensland Australia with vivid blue and purple veins across natural brown matrix. 100% natural untreated ready to wear jewelry perfect for collectors and opal lovers.
Sterling Silver Blue Oval Boulder Opal Ring 21 ct US 7
AU$220Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 16x13x6 mm approx
Whole Ring Weight: 21 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
Gem Pipe Crystal Boulder Opal Chips Jar 81ct
AU$213Weight: 29 kilogram total weight
Dimensions: see ruler in image
Source: Queensland, Australia
Quantity: see image
Photos and Video taken under overcast outdoor shady conditions. Price includes Worldwide Shipping.
Koroit Boulder Opal Pendant Necklace 32ct
AU$21332ct Australian Boulder Opal pendant necklace from Koroit, Queensland displays bright blue and green fire across its polished ironstone body. Designed with a natural drilled hole and adjustable brown cord, this 100% natural and untreated gemstone necklace is perfect for October birthstone jewelry and meaningful gifts.
Type: Natural Solid Boulder Opal Pendant Necklace
Origin: Koroit, Queensland, Australia
Dimensions: 46 × 10 × 5 mm (approx.)
Weight: 32 ct (approx.)
Color: Blue and green fire within polished brown ironstone
Cut/Shape: Long freeform cabochon with drilled hole
Necklace: Adjustable brown cord, ready to wear
Treatment: 100% natural, untreated opal (not a doublet or triplet)
1.08ct Natural Dark Opal Green Fire
AU$213Opal Details:
Opal Type: Natural, Solid, Untreated
Origin: Lightning Ridge, Australia
Dimensions: 12x8x2 mm approx
Weight: 1.08ct approx
44ct Boulder Opal Pendant Freeform Earthy
AU$213100% Natural Australian Opal, Drilled
Source: Winton, QLD, Australia
Dimensions: 31.5x18x7mm
Weight: 44 ct
(Size and weight are approximate)
Adjustable Black Rope Necklace
1.64ct Natural Dark Opal Bright Green Blue Cyan Fire
AU$2061.64ct natural dark opal from Lightning Ridge Australia features vibrant cyan green and blue fire glowing across its polished pear cabochon. This natural untreated solid opal is perfect for October birthstone jewelry, ready to set into rings, pendants, or fine custom jewelry designs.
Type: Natural Solid Dark Opal (Semi Black Opal)
Origin: Lightning Ridge, Australia
Dimensions: 13 x 7.5 x 3 mm (approx.)
Weight: 1.64 ct (approx.)
Color: Cyan, green, and blue fire with dark body tone
Cut/Shape: Polished pear cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
6.99ct Natural Crystal Boulder Opal
AU$199Natural Solid Untreated Australian Crystal Boulder Opal Polished Stone
Weight: 6.99 carats
Dimensions: 15.5x10x6 mm
Source: Winton, QLD, Australia
Size and weight are approximate
Boulder Opal Pendant 20ct
AU$19220ct Solid Boulder Opal pendant necklace from Queensland Australia with vivid multicolor fire across a natural brown matrix. 100% natural untreated ready to wear opal jewelry.
Type: Natural Solid Boulder Opal Pendant
Origin: Queensland Australia
Weight: 20ct approx
Dimensions: 28x13x5.5 mm
Shape: Freeform pendant
Color: Multicolor fire across brown matrix
Treatment: Untreated 100% natural
Necklace: Adjustable cord ready to wear
Boulder Opal Pendant 27ct Blue Green Fire
AU$19227ct boulder opal pendant with vivid blue and green fire in natural ironstone. Solid, untreated Australian opal on adjustable cord, ready to wear.
Dimensions: 20.5 × 15 × 6.5 mm approx
Weight: 27 ct approx
Origin: Koroit, Queensland Australia
Opal Type: Natural Solid Boulder Opal
Necklace: Cream adjustable cord
Treatment: 100% natural untreated opal
Boulder Opal Pendant 64ct Blue Purple Fire
AU$17864ct boulder opal pendant with blue and purple fire in natural ironstone. Solid untreated Australian opal on adjustable cord necklace, ready to wear.
Dimensions: 32 × 19.5 × 7 mm approx
Weight: 64 ct approx
Origin: Koroit, Queensland Australia
Opal Type: Natural Solid Wood Fossil Boulder Opal
Necklace: Brown adjustable cord
Treatment: 100% natural untreated opal
2.88ct Natural Dark Opal – Teardrop Blue Green
AU$171
Opal Details:
-
Type: Natural, Solid, Untreated, Polished Dark Opal
-
Origin: Lightning Ridge, NSW, Australia
-
Dimensions: 14 × 8 × 4 mm (approx.)
-
Weight: 2.88 ct (approx.)
Gem Pipe Crystal Boulder Opal Chips Jar 50ctw – Earth Mined Opal Chips
AU$142Weight: 50 carat total approximate weight
Dimensions: Jar 50x22x22mm (including lid)
Source: Quilpie, QLD, Australia
Quantity: Various
Gem Quality Pipe Crystal Opal chips ideal for souvenir, use as inlay material or cutting. Some opals are of size to cut small gems. Photos and Video taken under LED lighting. Jar filled with either water or oil.
Gem Pipe Crystal Boulder Opal Chips Jar 50ctw – Mineral Collector Stones
AU$142Weight: 50 carat total approximate weight
Dimensions: Jar 50x22x22mm (including lid)
Source: Quilpie, QLD, Australia
Quantity: Various
Gem Quality Pipe Crystal Opal chips ideal for souvenir, use as inlay material or cutting. Some opals are of size to cut small gems. Photos and Video taken under LED lighting. Jar filled with either water or oil.
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.