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0.53ct 7.7x7mm Free Form Cab Natural Koroit Nut Matrix Boulder Opal, Australia

$ 0.87 $ 0.52

Andy's Gem Garage Sale -Austrailian Boulder Opal #10 3 pieces - 1.70cts FIRE!!!

$ 29.92 $ 17.95

Andy's Gem Garage Sale - #6 Austrailian Boulder Opal 2 pieces - 2.35cts FIRE!!!

$ 28.16 $ 16.89

Boulder Solid Opal 10.20 cts 100% Natural Solid Ready To Set in Jewelry B1590

$ 17.6 $ 10.56

QUEENSLAND 321c BOULDER OPAL AUSTRALIA PREFORM ROUGH RUB PARCEL OCA13783

$ 25.52 $ 15.31

19.95 Cts Unheated Australian Boulder Opal Loose Gemstone cabochon Natural VG78

$ 10.19 $ 6.11

Flashes of Color * 33ct Natural Australian Solid Yowah Boulder Opal * See Video

$ 136.4 $ 81.84

2.50Ct UNIQUE RAREST 3D METALLIC BLUE GREEN FLASHY PICTURE KOROIT BOULDER OPAL

$ 8.79 $ 5.27

Australian Boulder Opal Freeform Rectangle Nugget Beads, (package of 6 beads)

$ 17.55 $ 10.53

Veins of Color * 35ct Natural Australian Solid Koroit Boulder Opal * See Video

$ 206.8 $ 124.08

Gorgeous Shimmering 26.87 CT Natural Australian Boulder Opal Pendant Gold Plated

$ 61.6 $ 36.96

Natural Boulder Opal Amazing Oval Shape Cabochon Loose Gemstone 45 Cts AA-1666

$ 4.39 $ 2.63

4.62 ct Amazing Fancy (26 x 7 mm) Multi Color Australian Koroit Boulder Opal

$ 8.79 $ 5.27

Electric Gem Colors * 3ct Natural Australian Solid Koroit Boulder Opal * Video

$ 484 $ 290.39

18.52Ct SUPERB COLLECTION ! VIOLET BLUE FLASHY MATRIX DESIGN KOROIT BOULDER OPAL

$ 17.59 $ 10.55

9.1 gram boulder opal rough - Australia specimen

$ 35.2 $ 21.12

Andy's Gem Garage Sale - #5 Austrailian Boulder Opal 2 pieces - 3.95cts FIRE!!!

$ 28.16 $ 16.89

3.01ct Oval Cabochon Natural Winton Area Matrix Boulder Opal, Australia

$ 46.2 $ 27.72

Australia Natural BOULDER OPAL Cutting Rough Lot 18.00cts

$ 29.04 $ 17.42

29 gram boulder opal rough - Australia specimen

$ 61.6 $ 36.96

Natural Gem Boulder Australian Opal 5.5mm Smooth Round Beads Bracelet 7" 38Cts.

$ 30.8 $ 18.48

16.8 CT **VIDEOS** Striking Queensland Boulder Opal Cabochon Loose Stone 77

$ 113.52 $ 68.11

25.49Ct UNIQUE RAREST GEM ! METALLIC GREEN BLUE FLASHY AUSTRALIAN BOULDER OPAL

$ 17.59 $ 10.55

4.97 ct Resplendent Fancy (16 x 11 mm) Multi Australian Koroit Boulder Opal

$ 11 $ 6.6

AAA+ Quality 100% Natural Boulder Opal Oval Cabochon Gemstone 29 Ct. 30X20X6 mm

$ 3.51 $ 2.1

1.26ct Oval Cabochon Natural Winton Area Matrix Boulder Opal, Australia

$ 46.2 $ 27.72

16.71ct Rectangle Cabochon Natural Winton Area Matrix Boulder Opal, Australia

$ 46.2 $ 27.72

Green Violet Turquoise 21ct Natural Australian Solid Matrix Boulder Opal * Video

$ 242 $ 145.19

Bright Color Flashes * 17ct Natural Australian Solid Matrix Boulder Opal * Video

$ 242 $ 145.19

Andy's Gem Garage Sale - #8 Austrailian Boulder Opal - 5.55cts Amazing FIRE!!!

$ 48.4 $ 29.04

100% Natural Australian BOULDER OPAL Pear Cab 33.45 Cts 23x29x6 mm Gemstone

$ 6.15 $ 3.69

8.27ct Oval Cabochon Natural Winton Area Matrix Boulder Opal, Australia

$ 46.2 $ 27.72

2.65 ct Significant Fancy (13 x 8 mm) Multi Australian Koroit Boulder Opal

$ 46.63 $ 27.97

Natural Boulder Opal Amazing Looking Cabochon Loose Gemstone 37 Cts AA-1704

$ 4.39 $ 2.63

Green & Violet * 6ct Natural Australian Solid Matrix Boulder Opal * See Video

$ 189.2 $ 113.52

1.11Ct UNIQUE RAREST GEM ! CRYSTAL CORES GREEN FLASHY AUSTRALIAN BOULDER OPAL

$ 8.79 $ 5.27

7.25 gram boulder opal rough - Australia specimen

$ 39.6 $ 23.76

Lovely 10ct Natural Australian Solid Koroit Boulder Opal * See Video Clip

$ 105.6 $ 63.35

Polished Boulder Opal! 11 TCW! Ready To Set

$ 39.6 $ 23.76

Yowah Matrix Boulder Opal Pendant from Queensland AU

$ 29.04 $ 17.42

29.40 Cts 100% Natural BOULDER OPAL PEAR Cabochon 17X34X6 mm Loose Gemstone

$ 14.95 $ 8.97

Yowah Boulder Opal 13.26 cts G8106

$ 35.19 $ 21.11

Green Violet Turquoise * 24ct Natural Australian Solid Koroit Boulder Opal

$ 158.4 $ 95.04

Huge Vibrant Yowah Boulder Opal With Bright Colorful Veins Sparkles

$ 167.2 $ 100.32

Gem Color Streaks * 22ct Natural Australian Solid Matrix Boulder Opal * Video

$ 396 $ 237.6

Natural Australian Boulder Opal Gorgeous Color & Pattern 7.19 Carat Unmounted

$ 51.91 $ 31.14

Natural Gem Boulder Australian Opal 5.5mm Size Smooth Round Beads Necklace 17"

$ 65.12 $ 39.07

Natural Boulder Opal Amazing Pear Shape Cabochon Loose Gemstone 58 Cts AA-1681

$ 4.39 $ 2.63

Natural Boulder Opal Amazing Pear Shape Cabochon Loose Gemstone 57 Cts AA-1715

$ 4.39 $ 2.63

Natural Boulder Opal Gemstone 26.65 Cts Loose cabochon From Australia VG79

$ 8.26 $ 4.95

36.43Ct UNIQUE RAREST GEM ! CRYSTAL CORES VIOLET FLASH AUSTRALIAN BOULDER OPAL

$ 17.59 $ 10.55

Natural Gem Australian Boulder Fire Opal 4 to 7mm Size Round Beads Necklace 17"

$ 88 $ 52.8

Natural Boulder Opal Amazing Looking Cabochon Loose Gemstone 117 Cts AA-1709

$ 4.39 $ 2.63

Natural Boulder Opal Amazing Looking Cabochon Loose Gemstone 25 Cts AA-1678

$ 3.51 $ 2.1

Natural Boulder Opal Amazing Looking Cabochon Loose Gemstone 40 Cts AA-1701

$ 4.39 $ 2.63

Natural Boulder Opal Gemstone 78.85 Cts Loose cabochon From Australia VG68

$ 11.95 $ 7.17

Natural Boulder Opal Gemstone 22.55 Cts Loose cabochon From Australia VG77

$ 10.02 $ 6.01

Nice 14 gram boulder opal rough specimen - Australia cabbing rough

$ 44 $ 26.4

Beautiful Double Sided Nut, Yowah Boulder Opal 17.9 cts S5988

$ 48.39 $ 29.03

Boulder Opal 31x21 with 3 mm Dome over 64cts. Drilled from Australia (4558)

$ 39.59 $ 23.75

Lively Double-Sided * 12ct Natural Australian Solid Koroit Boulder Opal * Videos

$ 536.79 $ 322.08

18.59ct Free Form Cabochon Natural Winton Area Matrix Boulder Opal, Australia

$ 66 $ 39.6

Large Boulder Opal With Colorful Veins On Both Sides From Opalton  Australia

$ 74.8 $ 44.88

71.00Cts. 100% Natural Australian Boulder Opal Oval Cabochon Top Loose Gemstone

$ 15.83 $ 9.49

Natural Australian Boulder Opal Specimen Bright Blues Greens Double sided (1409)

$ 391.6 $ 234.96

Red, Yellow, Blue and Green, Yowah Boulder Opal 3.63 cts S7501

$ 48.39 $ 29.03

55.10 cts Natural Australian Boulder Opal KOROIT

$ 23.75 $ 14.25

Australian Natural Boulder Opal Pendant, Side Drilled

$ 30.79 $ 18.47

Natural Queensland Australia BOULDER OPAL Rough Rub 33.65cts

$ 17.6 $ 10.56

Double-Sided 21ct Natural Australian Solid Koroit Boulder Opal * See Videos

$ 334.4 $ 200.64

Vintage Estate Loose 14 x 22 mm Australian Boulder Opal 1.56 Grams 7.65 Ct 7/8"

$ 219.95 $ 131.97

6.00 ct Fancy Shape (19 x 13 mm) Multi Color Australian Koroit Boulder Opal

$ 82.35 $ 49.41

29.48 CT Natural Australian Boulder Opal Rectangle Green Fire Vein Pendant

$ 57.2 $ 34.32

QUEENSLAND BOULDER OPAL 49.9c AUSTRALIAN GEM POLISHED CABOCHON UNSET OCA13540

$ 175.12 $ 105.07

20.5 gram boulder opal rough - Australia specimen

$ 44 $ 26.4

3.44 ct Fancy Cabochon Shape (14 x 11 mm) Australian Koroit Boulder Opal

$ 8.79 $ 5.27

Australian 12ct+ white opal rub alot of reds and yellows look soild color band !

$ 39.59 $ 23.75

4.6 gram boulder opal rough specimen - Australia

$ 35.2 $ 21.12

4.93 ct TOPNOTCH FANCY (18 X 8 MM) MULTI COLOR AUSTRALIAN KOROIT BOULDER OPAL

$ 63.35 $ 38.01

Blue and Green Veins, Two Sided, Yowah Boulder Opal 3.05 cts S8409

$ 30.79 $ 18.47

Yowah Boulder Opal 6.57 cts S9125

$ 26.39 $ 15.83

4.24ct Half Moon Cabochon Natural Winton Area Matrix Boulder Opal, Australia

$ 46.2 $ 27.72

Green & Violet * 58ct Natural Australian Solid Yowah Boulder Opal * See Video

$ 145.19 $ 87.11

52.87 CT Natural Australian Boulder Opal Large Teardrop Pendant

$ 52.8 $ 31.67

28.35 Cts 100% Natural BOULDER OPAL Cushion Cabochon 16x19x7 mm Loose Gemstone

$ 11.43 $ 6.85

14.57ct Oval Cabochon Natural Winton Area Matrix Boulder Opal, Australia

$ 66 $ 39.6

Electric Gem Colors * 8ct Natural Australian Solid Koroit Boulder Opal * Video

$ 228.8 $ 137.28

Flashy Colors * 23ct Natural Australian Solid Matrix Boulder Opal * See Video

$ 140.8 $ 84.48

5.55 ct Fantastic Fancy (17 x 10 mm) Multi Color Australian Koroit Boulder Opal

$ 83.59 $ 50.15

Electric Color-Filled Veins * 33ct Natural Australian Solid Koroit Boulder Opal

$ 396 $ 237.6

Polished side drilled Boulder Opal from Queensland; bright green crystal.

$ 48.4 $ 29.04

Natural Boulder Opal Amazing Oval Shape Cabochon Loose Gemstone 32 Cts AA-1683

$ 4.39 $ 2.63

Black Matrix! 15.8ct Solid Boulder Opal Green & Multicolor Freeform Queensland

$ 114.39 $ 68.63

Flickering Red & Green * 9ct Natural Australian Solid Koroit Boulder Opal

$ 277.2 $ 166.32

100% Natural Boulder Opal Pear Cabochon 64.50 Cts 26x44x6 mm Australian Gemstone

$ 13.19 $ 7.91

Natural Boulder Opal Amazing Pear Shape Cabochon Loose Gemstone 83 Cts AA-1650

$ 4.39 $ 2.63

Natural Boulder Opal Amazing Pear Shape Cabochon Loose Gemstone 51 Cts AA-1647

$ 4.39 $ 2.63

Natural Australian Boulder Opal Solid Loose Cut Stone Multicolour 5.5ct (2924)

$ 288.64 $ 173.18

5.35 Ct Dazzling (16 x 11) Neon Violet Natural Australian Koroit Boulder Opal

$ 43.99 $ 26.39

1.65 Ct Impressive (8 x 7) Neon Violet Natural Australian Koroit Boulder Opal

$ 43.99 $ 26.39