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44.59 ct Yellow Quartz, 26.8 x 20.5 mm Oval Cut From Brazil, Photo A

44.59 ct Yellow Quartz, 26.8 x 20.5 mm Oval Cut From Brazil

Quartz

44.59ct1 pc
$ 58.86
26.8 x 20.5 mm
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43.2 carat Pear Tiger's Eye, loose Certified Tiger's Eye from Thailand, Natural Untreated Gem, 33.3 x 22.3 mm, Photo A

43.2 carat Pear Tiger's Eye, loose Certified Tiger's Eye from Thailand, Natural Untreated Gem, 33.3 x 22.3 mm

Tiger's Eye

43.20ct1 pc
$ 38.02
33.3 x 22.3 mm
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63.72 ct Baguette Jasper, 33.8 x 26 mm From Indonesia, Photo A

63.72 ct Baguette Jasper, 33.8 x 26 mm From Indonesia

Jasper

63.72ct1 pc
$ 44.60
33.8 x 26 mm
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98.17 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 35.8 x 29.2 mm, Photo A
Click for Product Video (639273)

98.17 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 35.8 x 29.2 mm

Amethyst

98.17ct1 pc
$ 687.19
35.8 x 29.2 mm
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37.2 ct Oval Star Ruby, 20.3 x 17.2 mm From Madagascar, Photo A

37.2 ct Oval Star Ruby, 20.3 x 17.2 mm From Madagascar

Star Ruby

37.20ct1 pc
$ 491.04
20.3 x 17.2 mm
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15.17 ct Green Apatite, 13.7 x 13.5 mm Asscher Cut From Madagascar, Photo A
Click for Product Video (396053)

15.17 ct Green Apatite, 13.7 x 13.5 mm Asscher Cut From Madagascar

Apatite

15.17ct1 pc
$ 563.11
13.7 x 13.5 mm
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8.6 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 13.2 x 11.6 mm, Photo A

8.6 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 13.2 x 11.6 mm

Ruby

8.60ct1 pc
$ 430.00
13.2 x 11.6 mm
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31.08 ct Oval Howlite, 31.7 x 22.1 mm From the United States, Photo A

31.08 ct Oval Howlite, 31.7 x 22.1 mm From the United States

Howlite

31.08ct1 pc
$ 15.54
31.7 x 22.1 mm
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30.87 ct Pencil Cut Strawberry Quartz, 34 x 11 mm From Russia, Photo A

30.87 ct Pencil Cut Strawberry Quartz, 34 x 11 mm From Russia

Strawberry Quartz

30.87ct1 pc
$ 3.09
34 x 11 mm
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25.63 ct Oval Star Ruby, 17.6 x 15 mm From Madagascar, Photo A

25.63 ct Oval Star Ruby, 17.6 x 15 mm From Madagascar

Star Ruby

25.63ct1 pc
$ 338.32
17.6 x 15 mm
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14.9 carat Black Tourmaline, Cushion loose Tourmaline from Mozambique, Natural Untreated Gem, 17 x 12.5 mm, Photo A

14.9 carat Black Tourmaline, Cushion loose Tourmaline from Mozambique, Natural Untreated Gem, 17 x 12.5 mm

Tourmaline

14.90ct1 pc
$ 74.50
17 x 12.5 mm
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50.01 ct Baguette Tiger's Eye Matrix, 32.8 x 19.9 mm From Mexico, Photo A

50.01 ct Baguette Tiger's Eye Matrix, 32.8 x 19.9 mm From Mexico

Tiger's Eye Matrix

50.01ct1 pc
$ 22.50
32.8 x 19.9 mm
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96.22 ct Cushion Hematite, 24.3 x 21.4 mm From Brazil, Photo A

96.22 ct Cushion Hematite, 24.3 x 21.4 mm From Brazil

Hematite

96.22ct total2 pcs
$ 94.20
24.3 x 21.4 mm
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59.63 ct Oval Jasper, 38.2 x 26.2 mm From Indonesia, Photo A

59.63 ct Oval Jasper, 38.2 x 26.2 mm From Indonesia

Jasper

59.63ct1 pc
$ 29.51
38.2 x 26.2 mm
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27.98 ct Yellow Quartz, 21.5 x 16.8 mm Oval Cut From Brazil, Photo A

27.98 ct Yellow Quartz, 21.5 x 16.8 mm Oval Cut From Brazil

Quartz

27.98ct1 pc
$ 36.94
21.5 x 16.8 mm
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21.12 ct Odd Shaped Rainbow Pyrite, 19.6 x 11.3 mm From Russia, Photo A

21.12 ct Odd Shaped Rainbow Pyrite, 19.6 x 11.3 mm From Russia

Rainbow Pyrite

21.12ct1 pc
$ 54.91
19.6 x 11.3 mm
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55.52 ct Oval Hematite, 20.5 x 14.5 mm From Brazil, Photo A

55.52 ct Oval Hematite, 20.5 x 14.5 mm From Brazil

Hematite

55.52ct total2 pcs
$ 54.35
20.5 x 14.5 mm
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23.16 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 31 x 17.6 mm, Photo A

23.16 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 31 x 17.6 mm

Ammolite

23.16ct1 pc
$ 254.76
31 x 17.6 mm
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22.97 carat Brown Spessartite Garnet, Carved Rose loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 16.2 x 15.9 mm, Photo A

22.97 carat Brown Spessartite Garnet, Carved Rose loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 16.2 x 15.9 mm

Spessartite Garnet

22.97ct1 pc
$ 21.22
16.2 x 15.9 mm
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105.43 ct Green Agate, 29.6 x 28.5 mm Pyramid Cut From Indonesia, Photo A
Click for Product Video (693019)

105.43 ct Green Agate, 29.6 x 28.5 mm Pyramid Cut From Indonesia

Agate

105.43ct1 pc
$ 36.90
29.6 x 28.5 mm
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66.1 carat Pear Dendritic Agate, loose Certified Dendritic Agate from India, Natural Untreated Gem, 47.4 x 31.3 mm, Photo A

66.1 carat Pear Dendritic Agate, loose Certified Dendritic Agate from India, Natural Untreated Gem, 47.4 x 31.3 mm

Dendritic Agate

66.10ct1 pc
$ 33.05
47.4 x 31.3 mm
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23.11 ct Yellow Star Sapphire, 18.8 x 15.9 mm Oval Cut From Madagascar, Photo A

23.11 ct Yellow Star Sapphire, 18.8 x 15.9 mm Oval Cut From Madagascar

Star Sapphire

23.11ct1 pc
$ 228.79
18.8 x 15.9 mm
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23.57 carat Blue Aquamarine, Emerald Cut loose Aquamarine from India, Natural Untreated Gem, 30.7 x 9.5 mm, Photo A
Click for Product Video (486948)

23.57 carat Blue Aquamarine, Emerald Cut loose Aquamarine from India, Natural Untreated Gem, 30.7 x 9.5 mm

Aquamarine

23.57ct1 pc
$ 3,535.50
30.7 x 9.5 mm
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62.53 ct Oval Tiger's Eye Matrix, 38.6 x 25.9 mm From Mexico, Photo A

62.53 ct Oval Tiger's Eye Matrix, 38.6 x 25.9 mm From Mexico

Tiger's Eye Matrix

62.53ct1 pc
$ 28.14
38.6 x 25.9 mm
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26.18 ct Black Spinel, 18.2 x 11.9 mm Barrel Cut From Thailand, Photo A

26.18 ct Black Spinel, 18.2 x 11.9 mm Barrel Cut From Thailand

Spinel

26.18ct total2 pcs
$ 143.99
18.2 x 11.9 mm
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26.64 ct Oval Jasper, 20 x 15.2 mm From Indonesia, Photo A

26.64 ct Oval Jasper, 20 x 15.2 mm From Indonesia

Jasper

26.64ct total2 pcs
$ 29.30
20 x 15.2 mm
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11.34 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 13.7 x 11.1 mm, Photo A

11.34 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 13.7 x 11.1 mm

Ruby

11.34ct1 pc
$ 362.98
13.7 x 11.1 mm
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7.78 ct Blue Green Grandidierite, 15.2 x 10.7 mm Cushion Cut From Madagascar, Photo A
Click for Product Video (472024)

7.78 ct Blue Green Grandidierite, 15.2 x 10.7 mm Cushion Cut From Madagascar

Grandidierite

7.78ct1 pc
$ 1,711.60
15.2 x 10.7 mm
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60.66 ct Cushion Variscite, 38.8 x 31.9 mm From Australia, Photo A

60.66 ct Cushion Variscite, 38.8 x 31.9 mm From Australia

Variscite

60.66ct1 pc
$ 71.58
38.8 x 31.9 mm
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40.07 ct Trillion Jasper, 33.3 x 24 mm From Indonesia, Photo A

40.07 ct Trillion Jasper, 33.3 x 24 mm From Indonesia

Jasper

40.07ct1 pc
$ 44.08
33.3 x 24 mm
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35.14 ct Loose Oval Jasper, 27.1 x 18.3 mm From India, Photo A

35.14 ct Loose Oval Jasper, 27.1 x 18.3 mm From India

Jasper

35.14ct1 pc
$ 38.65
27.1 x 18.3 mm
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4.42 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gem, 14.7 x 11 mm, Photo A

4.42 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gem, 14.7 x 11 mm

Ruby

4.42ct1 pc
$ 88.40
14.7 x 11 mm
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Photos are of Actual Products for Sale
Choose from a large selection of giant gems, whether they are for a gemstone collection, ornaments or statement jewelry pieces. Shop for huge faceted gems and cabochons of various shapes, sizes and colors, including tourmaline, quartz, garnet and lesser-known gems, such as rhodochrosite. Large star and cat's eye gemstones are also available. From this page, you can filter by gem type, color, size, price, carat weight and several other factors to find the perfect big gemstone for your jewelry.
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I love the clear description of the certification options. It's very rare to see a gem site that offers a deep explanation of each institution that would certify the stone(s).

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