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Boulder Opal Ring 29ct Sterling Silver US6 3/4
Original price was: AU$696.AU$592Current price is: AU$592.Green 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
Original price was: AU$696.AU$592Current price is: AU$592.Vivid 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
Opal Doublet Parcel Calibrated 8x5mm
AU$590Australian opal doublet parcel with calibrated 8x5mm teardrop stones showing electric neon orange, yellow, green, and blue fire. Ideal for earrings, pendants, and small matching jewelry layouts. Strong visual impact with high contrast color play.
Stone Type: Australian Opal Doublet
Origin: Coober Pedy, Australia
Size: 8 × 5 mm approx (calibrated)
Total Weight: 3.73ctw approx
4mm Round Calibrated Opal Doublet Parcel 3.48ct
AU$590Australian opal doublet parcel calibrated 4mm round. Matched stones showing bright neon green, teal, and deep blue fire. Perfect for rings, earrings, pendants, and matched sets. Suitable for both custom jewelers and small production work.
Stone Type: Australian Opal Doublet
Size: 4mm round calibrated
Total Weight: 3.48ctw approx
Use: Rings, earrings, pendants, halo settings, fine jewelry work
4mm Round Calibrated Opal Doublet Parcel 3.5ct
AU$590Australian opal doublet parcel 25pcs calibrated 4mm round. Bright multicolor fire with strong green, blue, orange, and yellow flashes in a calibrated 4mm round parcel. Ideal for rings, earrings, pendants, and matching jewelry sets. Consistent sizing for production or custom work.
Stone Type: Australian Opal Doublet
Size: 4mm round calibrated
Total Weight: 3.5ctw approx
Use: Rings, earrings, pendants, halo settings, fine jewelry work
3.83ct Crystal Boulder Opal
AU$5903.83ct Australian crystal boulder opal showing brilliant green fire with purple body. Natural and untreated gemstone perfect for fine jewelry or October birthstone collections.
Type: Natural Solid Crystal Boulder Opal (Pipe Opal)
Origin: Queensland, Australia
Dimensions: 13.8 × 8.4 × 4.7 mm (approx.)
Weight: 3.83 ct (approx.)
Color: Brilliant green and blue fire with pink undertones
Cut/Shape: Oval cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
1.1ct Crystal Boulder Opal
AU$5901.1ct Australian crystal opal bright green fire with vivid lavender-blue. 100% Natural and untreated gemstone ideal for fine jewelry or October birthstone collectors.
Type: Natural Solid Crystal Opal (Crystal Boulder Opal)
Origin: Queensland, Australia
Dimensions: 10.5 × 7.5 × 2.6 mm (approx.)
Weight: 1.1 ct (approx.)
Color: Green fire with lavender-blue tone (appears magenta in camera)
Cut/Shape: Teardrop cabochon
Treatment: 100% natural, untreated opal (not a doublet or triplet)
7.7ct Natural Boulder Opal
AU$590Opal: Natural, Solid, Untreated, Polished
Color: Green, Blue, Pink
Shape: Freeform (Marquis)
Weight: 7.7 ct
Dimensions: 30x8x4.5mm
Source: Winton, QLD, Australia
Size and weight are approximate
1.75ct Natural Crystal Boulder Opal
AU$590100% Natural Solid Crystal Opal Polished Stone
Weight: 1.75 ct
Dimensions: 10.5x7x3 mm
Source: Queensland, Australia
Size and weight are approximate
Transparent
22.68ct Double Sided Natural Koroit Boulder Opal
AU$590100% Natural Polished Boulder Opal
Weight: 22.68 ct
Dimensions: 36×17.5×3.5 mm
Source: Koroit,QLD, Australia
23.11ct Natural Boulder Opal Deep Blue Fire
AU$590100% Natural Boulder Opal
Weight: 23.11 ct
Dimensions: 29.5x17x5 mm
Source: Winton, QLD, Australia
12.47ct Natural Australian Crystal Boulder Opal
AU$590Natural Solid Untreated Australian Pipe Crystal Boulder Opal Polished Stone
Weight: 12.47 carats
Dimensions: 18x12x.6.5 mm
Source: Winton, QLD, Australia
Size and weight are approximate
Boulder Opal Pendant 26.8 ct, Sterling Silver Green Flash Opal
Original price was: AU$675.AU$574Current price is: AU$574.Pendant: S925 Stamped Sterling Silver with Rhodium Plated
Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Setting Dimensions: 32x13x3.5 mm approx
Whole Pendant Weight: 26.8 ct approx
Boulder Opal Ring Sterling Silver Size 10
Original price was: AU$675.AU$574Current price is: AU$574.Accent Stone: Faceted Amethyst
Setting: Bezel set opal with prong set amethyst
Ring Size: US 10
Opal Weight: 1.1ct
Amethyst Weight: 0.63ct
Total Weight: 11.2ctw
Crystal Boulder Opal Pendant Sterling Silver 24.5ct
Original price was: AU$675.AU$574Current price is: AU$574.Type: Natural Solid Crystal Boulder Opal Necklace
Origin: Winton, Queensland, Australia
Weight: 24.5ctw approx. including pendant and necklace
Dimensions: 10 x 16.5 x 4.7 mm approx
Color: pink, orange, green
Shape: Elongated horizontal polished cabochon
Metal: 925 sterling silver pendant and necklace (stamped)
Chain: 18 inch (slightly adjustable)
Treatment: 100% natural untreated opal
1.8ct Crystal Opal Parcel 6pcs Calibrated 8x5mm
AU$5621.8ctw Calibrated crystal opal parcel from Coober Pedy, Australia featuring six matched pear cabochons with brilliant red, green, and blue fire. Precisely cut for easy jewelry setting, this natural untreated crystal opal parcel is ideal for earrings, pendants, and fine October birthstone jewelry designs.
Type: Natural Solid Crystal Opal Parcel
Origin: Coober Pedy, South Australia, Australia
Quantity: 6 pieces
Total Weight: 1.8ct approx
Dimensions: 8 x 5 x 1.3mm each approx
Color: Brilliant red, green, and blue fire with translucent crystal body tone
Cut Shape: Calibrated pear cabochon
Use: Easy to set for earrings, pendants, or fine jewelry
Treatment: 100% natural, untreated crystal opals (not doublets or triplets)
Half Moon Natural Boulder Opal 11.3 ct
AU$562Opal: Natural,Solid,Untreated, Polished
Weight: 11.3 ct
Dimensions: 25x12x5 mm
Source: Winton, QLD, Australia
(Size and weight are approximate)
Boulder Opal Pendant 103ct Multicolor Fire
Original price was: AU$661.AU$562Current price is: AU$562.Electric rainbow veins glow through natural ironstone in this 103ct Australian boulder opal pendant. Hand polished and set on an adjustable black cord, perfect for bold October birthstone jewelry.
Dimensions: 38 × 33 × 11 mm approx
Weight: 103ct approx
Origin: Winton, Queensland, Australia
Opal Type: Natural Solid Boulder Opal
Necklace: Adjustable black cord, gift ready
Treatment: None (100% natural, not a doublet or triplet)
Additional custom lighting image requests are not available.
Silver Australian Boulder Opal Pendant with Necklace 24 ct
Original price was: AU$661.AU$562Current price is: AU$562.Pendant: S925 Stamped Rhodium Plated Sterling Silver
Opal: Natural, Solid, Untreated, Polished
Source: Queensland, Australia
Dimensions: 31×13.5×4.6 mm
Whole Pendant Weight: 24 ct
(Size and weight are approximate)
Boulder Opal Pendant Sterling Silver Necklace
Original price was: AU$661.AU$562Current price is: AU$562.Type: Natural Solid Boulder Opal Necklace
Origin: Winton, Queensland, Australia
Weight: 23.7ctw approx. including pendant and necklace
Dimensions: 9 x 20 x 4 mm approx
Color: deep blue green
Shape: Elongated horizontal polished cabochon
Metal: 925 sterling silver pendant and necklace (stamped)
Chain: 18 inch (slightly adjustable)
Treatment: 100% natural untreated opal
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.