Boulder Opal Gemstones
Discover natural boulder opal gemstones featuring vivid color play set in distinctive ironstone matrix.
|
Bi-color
|
Black
|
Blue
|
Brown
|
Golden
|
Gray
|
Green
|
Multicolor Boulder Opal
|
Orange
|
Pink
|
Purple
|
Red
|
Turquoise
|
Violet
|
White
|
Yellow
|
Single |
Pairs |
Lots |
Faceted |
Cabochons |
20.55ct Multicolor Boulder Opal, Pear Shape, Opaque
31.9 x 16.1 mm
$ 112.58
33.71ct Multicolor Boulder Opal, Fancy, Opaque
32.6 x 22.1 mm
$ 184.67
14.98ct Multicolor Boulder Opal, Cushion, Opaque
20.2 x 13.9 mm
$ 87.03
30.94ct Multicolor Boulder Opal, Fancy, Opaque
25.4 x 20.1 mm
$ 169.49
35.99ct Multicolor Boulder Opal, Fancy, Opaque
45 x 23.8 mm
$ 107.53
19.94ct Multicolor Boulder Opal, Marquise, Opaque
36.4 x 16.3 mm
$ 109.23
21.82ct Multicolor Boulder Opal, Cushion, Opaque
20.7 x 16.1 mm
$ 167.34
41.37ct Multicolor Boulder Opal, Oval, Opaque
30 x 22 mm (calibrated)
$ 226.63
30.50ct Multicolor Boulder Opal, Pear Shape, Translucent
30 x 22 mm (calibrated)
$ 167.08
16.81ct Multicolor Boulder Opal, Fancy, Opaque
28.8 x 13.1 mm
$ 83.71
21.16ct Multicolor Boulder Opal, Fancy, Opaque
25.6 x 16.9 mm
$ 105.38
34.16ct Multicolor Boulder Opal, Oval, Opaque
23.4 x 19.6 mm
$ 262.36
21.39ct Multicolor Boulder Opal, Cushion, Opaque
16 x 16 mm (calibrated)
$ 164.04
42.73ct Multicolor Boulder Opal, Oval, Opaque
27 x 20 mm (calibrated)
$ 327.70
15.88ct Multicolor Boulder Opal, Cushion, Opaque
23.1 x 12.2 mm
$ 110.71
20.80ct Multicolor Boulder Opal, Fancy, Opaque
32.3 x 16.8 mm
$ 113.94
20.10ct Multicolor Boulder Opal, Cushion, Opaque
21.1 x 16.6 mm
$ 100.10
17.03ct Multicolor Boulder Opal, Fancy, Opaque
26.9 x 13.5 mm
$ 93.29
13.21ct Multicolor Boulder Opal, Fancy, Opaque
14 x 14 mm (calibrated)
$ 101.31
18.73ct Multicolor Boulder Opal, Fancy, Opaque
23.5 x 20.1 mm
$ 102.60
11.19ct Multicolor Boulder Opal, Fancy, Opaque
18.2 x 14.8 mm
$ 55.73
64.32ct Multicolor Boulder Opal, Fancy, Opaque
42.5 x 26.1 mm
$ 320.31
7.00ct Multicolor Boulder Opal, Fancy, Opaque
18.5 x 12.1 mm
$ 34.86
12.38ct Multicolor Boulder Opal, Fancy, Translucent
25 x 18 mm (calibrated)
$ 61.65
Why Buy Boulder Opal from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
Natural Boulder Opal Gemstones
Our natural boulder opal gemstones are sourced primarily from Australia and cut to preserve the stone’s natural ironstone backing and vibrant play of color.
Australian Boulder Opal Stones
Australian boulder opal is prized for its organic patterns, durability, and striking contrast between opal color and ironstone matrix, making each stone one of a kind.
Boulder Opal for Jewelry
Boulder opal is ideal for rings, pendants, and statement jewelry thanks to its natural backing, which provides added strength compared to many other opal types.
Loose Boulder Opal Stones
Buying loose boulder opal allows full creative freedom for custom jewelry designs, from freeform cabochons to polished statement pieces.
Boulder Opal Cabochons
Boulder opal is most commonly cut as cabochons to highlight its natural patterns and flowing color veins within the ironstone.
Unique Patterns and Color Play
Each boulder opal displays individual color flashes ranging from blue and green to fiery reds, often following natural seams within the host rock.
Wholesale Boulder Opal
We offer competitive pricing on boulder opal gemstones for jewelers, designers, and collectors seeking distinctive stones in larger quantities.
Learn more about opal varieties, properties, and care on our Opal Information Page.
FAQs
What is boulder opal?
Boulder opal is a natural opal found within ironstone, typically cut with part of the host rock attached to enhance durability and appearance.
Is boulder opal stronger than other opals?
Yes, the ironstone backing makes boulder opal more durable than many solid opals, making it well suited for everyday jewelry.
Are your boulder opals natural?
All our boulder opal gemstones are 100% natural. Any treatments, if present, are clearly disclosed.
Where does boulder opal come from?
Most boulder opal comes from Queensland, Australia, one of the world’s most important sources of this unique gemstone.
Is boulder opal good for rings?
Yes, boulder opal is a popular choice for rings due to its natural strength and striking appearance, especially in protective settings.
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
Very helpful and accommodating in all aspects of selecting and meeting what I was looking for.Very forthright and honest people to deal with.
Overall Rating -> 10
My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.
Overall Rating -> 9 
Easy to use. Many options to find the right gemstone
Overall Rating -> 9
I think therea's no problem
Overall Rating -> 10
Very food
Overall Rating -> 10
Always get a nice gemstone. Just like the picture. Never disappointed
