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 |
1.82ct Multicolor Boulder Opal, Oval, Opaque
10.6 x 8 mm
$ 9.10
2.03ct Multicolor Boulder Opal, Fancy, Opaque
9.3 x 7.2 mm
$ 10.15
2.95ct Multicolor Boulder Opal, Pear Shape, Opaque
11.5 x 8.5 mm
$ 14.75
2.53ct Multicolor Boulder Opal, Pear Shape, Opaque
11.8 x 8.4 mm
$ 12.65
4.57ct Multicolor Boulder Opal, Cushion, Opaque
18.9 x 9.1 mm
$ 22.85
17.18ct Multicolor Boulder Opal, Fancy, Opaque
21.2 x 16.1 mm
$ 85.90
4.49ct Multicolor Boulder Opal, Pear Shape, Opaque
12.3 x 9.3 mm
$ 22.45
7.72ct Multicolor Boulder Opal, Fancy, Opaque
22.4 x 13.4 mm
$ 38.60
10.38ct Multicolor Boulder Opal, Fancy, Opaque
17.8 x 13.6 mm
$ 51.90
5.56ct Multicolor Boulder Opal, Fancy, Opaque
20.2 x 10 mm
$ 27.80
9.37ct Multicolor Boulder Opal, Pear Shape, Opaque
24.7 x 11.8 mm
$ 46.85
15.36ct Multicolor Boulder Opal, Oval, Opaque
20.5 x 13.3 mm
$ 76.80
8.55ct Multicolor Boulder Opal, Cushion, Opaque
16 x 13.6 mm
$ 42.75
5.79ct Multicolor Boulder Opal, Fancy, Opaque
18.6 x 9 mm
$ 28.95
2.99ct Multicolor Boulder Opal, Fancy, Opaque
14.7 x 6.7 mm
$ 14.95
8.61ct Multicolor Boulder Opal, Fancy, Opaque
17.9 x 11.9 mm
$ 43.05
8.77ct Multicolor Boulder Opal, Fancy, Opaque
22.1 x 13.6 mm
$ 43.85
6.73ct Multicolor Boulder Opal, Oval, Opaque
18.2 x 11.7 mm
$ 33.65
6.91ct Multicolor Boulder Opal, Fancy, Opaque
19.3 x 10.7 mm
$ 34.55
17.98ct Multicolor Boulder Opal, Oval, Opaque
25 x 16.9 mm
$ 89.90
12.16ct Multicolor Boulder Opal, Fancy, Opaque
22.3 x 17.9 mm
$ 60.80
5.40ct Multicolor Boulder Opal, Oval, Opaque
16.4 x 10.3 mm
$ 27.00
13.99ct Multicolor Boulder Opal, Trillion, Opaque
20.3 x 17.8 mm
$ 69.95
8.33ct Multicolor Boulder Opal, Fancy, Opaque
17.9 x 11.7 mm
$ 41.65
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 -> 9 
If you have motion picture, then I will be more satisfied with.
Overall Rating -> 10 
It was easy to navigate
Overall Rating -> 10
Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.
Overall Rating -> 10
Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.
Overall Rating -> 10
Filters need to be improved but rest of website is great
Overall Rating -> 10
I love the quality, package and info of your gems.
