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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (142): Geode Gems - Agate Geode, Amethyst Geode, Citrine Geode Clear All
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57.7ct Fancy Crystal Cluster Yellow Golden Citrine Geode Gem (ID: 391760)
57.68 ct Citrine Geode
35.5 x 18.8 mm
$ 57.68
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19.4ct Fancy Crystal Cluster Multicolor Agate Geode Gem (ID: 461389)
19.37 ct (total 38.73ctw) Agate Geode
22.4 x 15.9 mm
$ 96.44
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8.3ct Fancy Crystal Cluster Multicolor Agate Geode Gem (ID: 454644)
8.32 ct (total 16.64ctw) Agate Geode
22.4 x 13.3 mm
$ 33.28
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14.6ct Fancy Crystal Cluster Multicolor Agate Geode Gem (ID: 450225)
14.58 ct (total 29.16ctw) Agate Geode
24.4 x 16.5 mm
$ 72.61
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72.2ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391899)
72.22 ct Amethyst Geode
35.5 x 31 mm
$ 72.22
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67.8ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391827)
67.83 ct Amethyst Geode
32.4 x 24.5 mm
$ 67.83
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73.5ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391818)
73.49 ct Amethyst Geode
34.5 x 28.1 mm
$ 73.49
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67.7ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391816)
67.71 ct Amethyst Geode
34.2 x 25.2 mm
$ 67.71
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74.4ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391789)
74.42 ct Amethyst Geode
31.6 x 28.3 mm
$ 74.42
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65.1ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391824)
65.12 ct Amethyst Geode
29.3 x 25.2 mm
$ 65.12
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74.5ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 392036)
74.48 ct Amethyst Geode
31.9 x 27.2 mm
$ 74.48
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64.4ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391806)
64.38 ct Amethyst Geode
32.4 x 26.2 mm
$ 64.38
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6.6ct Fancy Crystal Cluster Multicolor Agate Geode Gem (ID: 450137)
6.61 ct (total 13.22ctw) Agate Geode
18.4 x 12.4 mm
$ 32.92
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63.9ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391826)
63.86 ct Amethyst Geode
31.2 x 28.3 mm
$ 63.86
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65.5ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391738)
65.51 ct Amethyst Geode
33.3 x 24.8 mm
$ 65.51
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62.7ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391796)
62.72 ct Amethyst Geode
36 x 20.7 mm
$ 62.72
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75.8ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391741)
75.76 ct Amethyst Geode
35.4 x 28.5 mm
$ 75.76
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15.1ct Fancy Crystal Cluster Multicolor Agate Geode Gem (ID: 450057)
15.05 ct (total 30.09ctw) Agate Geode
21.2 x 16.2 mm
$ 74.92
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61.7ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391739)
61.70 ct Amethyst Geode
33.3 x 25.4 mm
$ 61.70
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76.6ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391736)
76.63 ct Amethyst Geode
34.6 x 27.5 mm
$ 76.63
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73.6ct Fancy Crystal Cluster Violet Amethyst Geode Gem (ID: 391802)
73.57 ct Amethyst Geode
31.5 x 26.1 mm
$ 73.57
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Geode Gems
On the outside, geodes appear to be nothing but rock, but looking deeper into the interior will reveal amazing growths of crystal formations. Natural gemstone geode crystals are usually composed of quartz or chalcedonic deposits, but various other minerals such as calcite, celestite and dolomite are also commonly found within other varieties of geodes.

Geodes are rock cavities or vugs with internal crystal formations ranging in a variety of interesting colors, including pale lilac to deep reddish purple, pale yellow to smoky yellowish brown, and ranging from transparent to translucent crystals. Agate geodes are often banded exhibiting very interesting patterns. Amethyst and citrine geodes can be small nodules cut in half or pieces of larger geodes sold as crystal clusters. Value per carat in geodes, unlike many gems, usually doesn't rise exponentially with weight as it is readily available in large sizes; but rather, the price depends almost entirely on the crystal growth and of course, color.

Crystal production that develops within a geode depends on several variables including the amount of moisture trapped within the geode, various chemicals and the variety of rich minerals deposited, as well as the amount of pressure applied to the geode. The entire process of geode formation takes millions of years, and not surprisingly, the majority of geode specimens are never completely filled out. Geodes with filled out crystal formations are often referred to as nodules; geode nodules composed of agate are referred to as 'thundereggs'.

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finally bought the last rock to complete my ring idea; needed another white one after giving the big diamond to my daughter. a diamond that size is out of my retired-school-teacher budget, so i bought a white zircon. went back to the same place that i got my loose sapphire-- great selection, good prices, good delivery!
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

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