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Sterling Silver Green Blue Boulder Opal Ring 28.5 ct US 10
AU$1,425Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 20×14.5×4.5 mm
Whole Ring Weight: 28.5 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US10 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Aqua Blue Boulder Opal Ring US 7 3/4
AU$570Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 21×12.5×5 mm
Whole Ring Weight: 23.5 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Sparkling Boulder Opal Ring US 8
AU$848Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 20.5x10x5 mm
Whole Ring Weight: 21 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
Sterling Silver Ocean Beach Blue Boulder Opal Ring 24 ct US 7 3/4
AU$1,710Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 17.5×15.5×5 mm
Whole Ring Weight: 24 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Purple Boulder Opal Ring 33 ct US 9
AU$1,283Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 26×13.5×6 mm
Whole Ring Weight: 33 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US9 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Purple Freeform Boulder Opal Ring 30 ct US 9
AU$1,710Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 25×13.5×6 mm
Whole Ring Weight: 30 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US9 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Ocean Blue Boulder Opal Ring 35.5 ct US 9 3/4
AU$990Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 20×16.5×5.5 mm
Whole Ring Weight: 35.5 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US9 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Half Moon Ocean Boulder Opal Ring 30 ct US 7 3/4
AU$976Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 23×15.5×5 mm
Whole Ring Weight: 30 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Ocean Blue Boulder Opal Ring 28.5 ct US 8
AU$1,853Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 26.5x10x6 mm
Whole Ring Weight: 28.5 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
Sterling Silver Ocean Boulder Opal Ring 19 ct US 7
AU$933Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 16.5x11x4.5 mm
Whole Ring Weight: 19 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Sparkling Boulder Opal Ring 24 ct US 7
AU$777Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 18x17x5 mm
Whole Ring Weight: 24 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Sterling Silver Sparkling Boulder Opal Ring US 7
AU$648Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 14.5x11x4 mm
Whole Ring Weight: 16 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US7 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Boulder Opal Ring 28.5ct Sterling Silver US6 1/4
AU$463Green flash and electric blue shimmer across natural ironstone in this solid Australian boulder opal ring. Large freeform bezel set in sterling silver, perfect for bold October birthstone jewelry.
Ring Size: US6 1/4 (not resizable)
Metal: S925 Sterling Silver, rhodium plated
Origin: Queensland, Australia
Setting Dimensions: 19 × 17 × 5.5 mm approx.
Weight: 28.5 ct approx. (whole ring)
Opal Type: Natural Solid Boulder Opal
Treatment: None (100% natural, not a doublet or triplet)
Additional custom lighting image requests are not available.
Boulder Opal Ring 29ct Sterling Silver US6 3/4
AU$705Green flash shimmers through natural ironstone in this solid Australian boulder opal ring. Bezel set in sterling silver, perfect for October birthstone jewelry.
Ring Size: US6 3/4 (not resizable)
Metal: S925 Sterling Silver, rhodium plated
Origin: Queensland, Australia
Setting Dimensions: 18.5 × 16.5 × 5.5 mm approx.
Weight: 29 ct approx. (whole ring)
Opal Type: Natural Solid Boulder Opal
Treatment: None (100% natural, not a doublet or triplet)
Boulder Opal Ring 15.5ct Sterling Silver US 7
AU$705Vivid blue fire defines this natural Australian boulder opal ring. Teardrop bezel set in sterling silver, perfect for everyday wear and October birthstone jewelry.
Ring Size: US7 (size change not available)
Dimensions: 17 x 10 x 3.5 mm approx.
Weight: 15.5ct approx. (whole ring)
Origin: Queensland, Australia
Opal Type: Natural Solid Boulder Opal
Treatment: None (100% natural, not a doublet or triplet)
Metal: S925 sterling silver, rhodium plated
Ring Band: 3.5 mm
Sterling Silver Purple Boulder Opal Ring 37ct US 8 3/4
AU$998Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 20.5×16.5×6 mm
Whole Ring Weight: 37 ct
Ring: S925 (Stamped), Rhodium Plated, Sterling Silver
Ring Band Dimension: 3.5 mm
Ring Size: US8 3/4 (Size change is not available)
Bezel set in Hypoallergenic Rhodium Plated 925 Sterling Silver
Size and weight are approximate
Boulder Opal Ring 30ct Sterling Silver US9
AU$563Deep purple and electric blue fire define this natural Australian boulder opal ring. Large rectangular bezel set in sterling silver, perfect for a bold statement and October birthstone jewelry.
Ring Size: US9 (size change not available)
Dimensions: 19 x 15 x 5.5 mm approx.
Weight: 30ct approx. (whole ring)
Origin: Queensland, Australia
Opal Type: Natural Solid Boulder Opal
Treatment: None (100% natural, not a doublet or triplet)
Metal: S925 sterling silver, rhodium plated
Ring Band: 3.5 mm
Boulder Opal Ring 20.5ct Sterling Silver US7
AU$905Vivid blue and green fire define this natural Australian boulder opal ring. Teardrop bezel set in sterling silver, perfect for a bold statement and October birthstone jewelry.
Ring Size: US7 (size change not available)
Dimensions: 20 x 12 x 5 mm approx.
Weight: 20.5ct approx. (whole ring)
Origin: Queensland, Australia
Opal Type: Natural Solid Boulder Opal
Treatment: None (100% natural, not a doublet or triplet)
Metal: S925 sterling silver, rhodium plated
Ring Band: 3.5 mm
Boulder Opal Ring 17ct Sterling Silver Blue Fire US7
AU$520Electric royal blue fire glows across natural ironstone in this Australian boulder opal ring. Polished teardrop bezel set in sterling silver, perfect as a bold statement and meaningful October birthstone jewelry.
Ring Size: US7 (size change not available)
Dimensions: 18.5 x 10.5 x 4.5 mm approx.
Weight: 17ct approx. (whole ring)
Origin: Queensland, Australia
Opal Type: Natural Solid Boulder Opal
Treatment: None (100% natural, not a doublet or triplet)
Metal: S925 sterling silver, rhodium plated
Ring Band: 3.5 mm
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
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.