Oval Boulder Opal Gemstones - Natural, Certified
Discover the unique beauty of Oval Boulder Opal Gemstones at GemSelect, featuring natural, certified loose gemstones with vibrant multicolor veins of red, blue, and green set against rich ironstone. Precision-cut into oval shapes to showcase their striking patterns, these gems range from $20 to $300 per carat. All stones are in stock, perfect for crafting bold rings , pendants , or earrings , with worldwide shipping to inspire your designs!
Bi-color
Black
Blue
Brown
Gray
Green
Multicolor Oval Boulder Opal
Orange
Pink
Purple
Red
Turquoise
Violet
White
Yellow
Clear Colors
Single
Pairs
Lots
Faceted
Cabochons
Showing results for
Sort By:
Price - High to Low
Price - Low to High
Size - Largest to Smallest
Size - Smallest to Largest
Weight - High to Low
Weight - Low to High
Clear All
ID:
634607
Weight:
12.07
Size:
27.4 x 9.9 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
101.39
Item in Stock
More Options & Item Details
ID:
635341
Weight:
25.30
Size:
29.7 x 13.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
212.52
Item in Stock
More Options & Item Details
ID:
410119
Weight:
34.16
Size:
23.4 x 19.6 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
316.10
Item in Stock
More Options & Item Details
ID:
522985
Weight:
41.37
Size:
30 x 22 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
273.05
Item in Stock
More Options & Item Details
ID:
322037
Weight:
42.73
Size:
27 x 20 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
394.82
Item in Stock
More Options & Item Details
ID:
300453
Weight:
28.58
Size:
23.1 x 18.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
240.07
Item in Stock
More Options & Item Details
ID:
634610
Weight:
22.12
Size:
27.5 x 12.8 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
185.81
Item in Stock
More Options & Item Details
ID:
321842
Weight:
22.67
Size:
21.8 x 16.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
209.47
Item in Stock
More Options & Item Details
ID:
635340
Weight:
7.95
Size:
18.3 x 9.9 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
66.78
Item in Stock
More Options & Item Details
ID:
718507
Weight:
50.24
Size:
32.3 x 24.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
301.44
Item in Stock
More Options & Item Details
ID:
420744
Weight:
12.87
Size:
21 x 10 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
101.93
Item in Stock
More Options & Item Details
ID:
628045
Weight:
9.86
Size:
20.4 x 11.2 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
59.16
Item in Stock
More Options & Item Details
ID:
635344
Weight:
15.09
Size:
18.5 x 14.6 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
126.76
Item in Stock
More Options & Item Details
ID:
744795
Weight:
17.98
Size:
25 x 16.9 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
89.90
Item in Stock
More Options & Item Details
ID:
626292
Weight:
4.31
Size:
15.8 x 10 mm
Clarity:
Translucent
Content:
1 pc
Price:
$
36.20
Item in Stock
More Options & Item Details
ID:
744805
Weight:
4.62
Size:
14 x 9 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
23.10
Item in Stock
More Options & Item Details
ID:
635338
Weight:
13.60
Size:
20 x 15 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
114.24
Item in Stock
More Options & Item Details
ID:
679213
Weight:
7.48
Size:
19.1 x 10.9 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
44.88
Item in Stock
More Options & Item Details
ID:
300454
Weight:
20.92
Size:
25.5 x 14.9 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
193.30
Item in Stock
More Options & Item Details
ID:
628408
Weight:
20.61
Size:
31.9 x 12.2 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
123.66
Item in Stock
More Options & Item Details
ID:
630669
Weight:
12.50
Size:
22.8 x 11.5 mm
Clarity:
Translucent
Content:
1 pc
Price:
$
105.00
Item in Stock
More Options & Item Details
ID:
636048
Weight:
7.43
Size:
23.9 x 8 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
62.41
Item in Stock
More Options & Item Details
ID:
522638
Weight:
9.66
Size:
22.4 x 13.1 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
63.76
Item in Stock
More Options & Item Details
ID:
302922
Weight:
32.39
Size:
33.7 x 15 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
299.28
Item in Stock
More Options & Item Details
ID:
628048
Weight:
15.41
Size:
20 x 15 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
92.46
Item in Stock
More Options & Item Details
ID:
744782
Weight:
5.40
Size:
16.4 x 10.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
27.00
Item in Stock
More Options & Item Details
ID:
627633
Weight:
13.49
Size:
19.8 x 13.9 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
124.64
Item in Stock
More Options & Item Details
ID:
718508
Weight:
10.02
Size:
20.8 x 14.2 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
60.12
Item in Stock
More Options & Item Details
ID:
744119
Weight:
5.70
Size:
15 x 10 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
28.50
Item in Stock
More Options & Item Details
ID:
679223
Weight:
13.59
Size:
20 x 15 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
81.54
Item in Stock
More Options & Item Details
ID:
635335
Weight:
14.55
Size:
26.3 x 11.2 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
122.22
Item in Stock
More Options & Item Details
ID:
628021
Weight:
7.69
Size:
16 x 12 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
64.60
Item in Stock
More Options & Item Details
ID:
523723
Weight:
36.66
Size:
39.1 x 16.4 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
241.96
Item in Stock
More Options & Item Details
ID:
322038
Weight:
54.71
Size:
27.3 x 23.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
505.52
Item in Stock
More Options & Item Details
ID:
302900
Weight:
23.34
Size:
20.8 x 14 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
215.66
Item in Stock
More Options & Item Details
ID:
744807
Weight:
3.94
Size:
12.1 x 8.4 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
19.70
Item in Stock
More Options & Item Details
ID:
321930
Weight:
36.09
Size:
29.8 x 18.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
333.47
Item in Stock
More Options & Item Details
ID:
744114
Weight:
22.64
Size:
23.1 x 17.6 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
113.20
Item in Stock
More Options & Item Details
ID:
718509
Weight:
6.08
Size:
16.1 x 9.9 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
36.48
Item in Stock
More Options & Item Details
ID:
679144
Weight:
21.69
Size:
23.8 x 14.7 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
130.14
Item in Stock
More Options & Item Details
ID:
744783
Weight:
6.73
Size:
18.2 x 11.7 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
33.65
Item in Stock
More Options & Item Details
ID:
628026
Weight:
8.42
Size:
18.8 x 13.8 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
70.73
Item in Stock
More Options & Item Details
ID:
248000
Weight:
13.14
Size:
19.5 x 13.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
121.42
Item in Stock
More Options & Item Details
ID:
636049
Weight:
11.57
Size:
17.3 x 12.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
97.19
Item in Stock
More Options & Item Details
ID:
744806
Weight:
1.82
Size:
10.6 x 8 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
9.10
Item in Stock
More Options & Item Details
ID:
679146
Weight:
15.66
Size:
18.4 x 14.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
93.96
Item in Stock
More Options & Item Details
ID:
321921
Weight:
21.32
Size:
27.3 x 13.1 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
196.99
Item in Stock
More Options & Item Details
ID:
636042
Weight:
7.10
Size:
21.2 x 10.1 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
59.64
Item in Stock
More Options & Item Details
ID:
718506
Weight:
24.71
Size:
42.2 x 16.8 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
148.26
Item in Stock
More Options & Item Details
ID:
678670
Weight:
12.53
Size:
17.8 x 13.7 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
75.18
Item in Stock
More Options & Item Details
ID:
744796
Weight:
15.36
Size:
20.5 x 13.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
76.80
Item in Stock
More Options & Item Details
ID:
321845
Weight:
22.54
Size:
24.8 x 20 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
208.27
Item in Stock
More Options & Item Details
ID:
678668
Weight:
10.30
Size:
22.6 x 15.6 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
61.80
Item in Stock
More Options & Item Details
ID:
628031
Weight:
14.37
Size:
16.4 x 13.1 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
120.71
Item in Stock
More Options & Item Details
ID:
627632
Weight:
8.06
Size:
16.8 x 11.8 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
74.47
Item in Stock
More Options & Item Details
ID:
679140
Weight:
7.32
Size:
14.4 x 10.5 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
43.92
Item in Stock
More Options & Item Details
ID:
678772
Weight:
12.95
Size:
23.1 x 12.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
77.70
Item in Stock
More Options & Item Details
ID:
744808
Weight:
2.86
Size:
13.6 x 7.3 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
14.30
Item in Stock
More Options & Item Details
ID:
636160
Weight:
6.20
Size:
22.9 x 7.6 mm
Clarity:
Opaque
Content:
1 pc
Price:
$
52.08
Item in Stock
More Options & Item Details
ID:
679240
Weight:
14.45
Size:
20 x 15 mm (calibrated)
Clarity:
Opaque
Content:
1 pc
Price:
$
86.70
Item in Stock
More Options & Item Details
Why Buy Oval Boulder Opal from GemSelect?
FAQs
What are oval boulder opal gemstones?
Oval boulder opal gemstones are natural opals from Australia, with vibrant red, blue, or green veins in ironstone matrix. Certified, they’re ideal for bold jewelry.
Are oval boulder opal gemstones treated?
Most oval boulder opal gemstones are untreated, showcasing natural patterns. Some are stabilized or sealed for durability, disclosed in certifications.
What jewelry suits oval boulder opal gemstones?
With a Mohs hardness of 5.5-6.5, oval boulder opal gemstones are best for pendants, earrings, or protected ring settings, perfect for artistic designs.
What color variations exist in oval boulder opal gemstones?
Oval boulder opal gemstones feature brown or gray ironstone with red, blue, green, or multicolored opal veins. Queensland stones show vivid, swirling patterns.
How do I buy oval boulder opal gemstones from GemSelect?
Visit the oval boulder opal gemstones category, select your loose stone by size or pattern, and purchase with secure checkout and worldwide shipping.
Are oval boulder opal gemstones in stock and ethically sourced?
All oval boulder opal gemstones are in stock, ethically sourced from Australia and Brazil, ensuring certified quality and sustainable practices.
What makes oval boulder opal gemstones unique?
Oval boulder opal gemstones stand out for their earthy ironstone matrix, vibrant play-of-color, and October birthstone status, ideal for rugged, unique jewelry.
GemSelect Certified Store ReviewsGemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10
It was good. There was a large selection at prices I could afford.
Posted By Zorah in February, 2026
Source: Bizrate
Overall Rating -> 10
went well
Posted By Doug in May, 2025
Source: Bizrate
Overall Rating -> 10
Web site is very simple to navigate
Selection is terrific
Posted By ToRa.62 in April, 2026
Source: Bizrate
Overall Rating -> 9
It was great!
Posted By Annie in September, 2025
Source: Bizrate
Overall Rating -> 10
On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc
Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate
Overall Rating -> 9
It was a good experience looking for and finding a nice amethyst stone
Posted By N/a in May, 2025
Source: Bizrate
