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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (162): Geode Gems - Agate Geode, Amethyst Geode, Citrine Geode Clear All
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thumb image of 49.3ct Fancy Crystal Cluster Yellow Golden Citrine Geode (ID: 470074)
49.25 ct Citrine Geode
27.6 x 25.7 mm
$ 49.33
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thumb image of 57.7ct Fancy Crystal Cluster Yellow Golden Citrine Geode (ID: 391760)
57.68 ct Citrine Geode
35.5 x 18.8 mm
$ 57.68
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thumb image of 7.3ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 455304)
7.27 ct (total 14.53ctw) Agate Geode
18.6 x 12.7 mm
$ 29.06
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thumb image of 8.2ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 454851)
8.20 ct (total 16.40ctw) Agate Geode
18.4 x 12.4 mm
$ 32.80
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thumb image of 8.3ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 454644)
8.32 ct (total 16.64ctw) Agate Geode
22.4 x 13.3 mm
$ 33.28
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thumb image of 17.9ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 455655)
17.87 ct (total 35.74ctw) Agate Geode
23.7 x 20.2 mm
$ 71.48
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thumb image of 19ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 450365)
18.95 ct (total 37.89ctw) Agate Geode
23.6 x 16.2 mm
$ 94.35
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thumb image of 65.5ct Fancy Crystal Cluster Violet Amethyst Geode (ID: 391738)
65.51 ct Amethyst Geode
33.3 x 24.8 mm
$ 65.51
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thumb image of 71.4ct Fancy Crystal Cluster Violet Amethyst Geode (ID: 391811)
71.41 ct Amethyst Geode
35.6 x 25.6 mm
$ 71.41
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thumb image of 13.3ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 450208)
13.28 ct (total 26.55ctw) Agate Geode
18.5 x 15.4 mm
$ 66.11
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thumb image of 65.1ct Fancy Crystal Cluster Violet Amethyst Geode (ID: 391824)
65.12 ct Amethyst Geode
29.3 x 25.2 mm
$ 65.12
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thumb image of 8.6ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 454759)
8.57 ct (total 17.13ctw) Agate Geode
18.6 x 15.1 mm
$ 34.26
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thumb image of 65ct Fancy Crystal Cluster Violet Amethyst Geode (ID: 391804)
64.95 ct Amethyst Geode
29.2 x 23 mm
$ 64.95
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thumb image of 8.8ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 454642)
8.77 ct (total 17.53ctw) Agate Geode
22.2 x 13.2 mm
$ 35.06
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thumb image of 73.5ct Fancy Crystal Cluster Violet Amethyst Geode (ID: 391818)
73.49 ct Amethyst Geode
34.5 x 28.1 mm
$ 73.49
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thumb image of 71ct Fancy Crystal Cluster Violet Amethyst Geode (ID: 391788)
71.01 ct Amethyst Geode
33.4 x 26.9 mm
$ 71.01
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thumb image of 35.4ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 391882)
35.43 ct Agate Geode
26.6 x 26.1 mm
$ 35.43
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thumb image of 73.6ct Fancy Crystal Cluster Violet Amethyst Geode (ID: 391802)
73.57 ct Amethyst Geode
31.5 x 26.1 mm
$ 73.57
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thumb image of 32.8ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 446998)
32.82 ct (total 65.63ctw) Agate Geode
27.3 x 22.3 mm
$ 65.63
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thumb image of 7.2ct Fancy Crystal Cluster Multicolor Agate Geode (ID: 449962)
7.16 ct (total 14.31ctw) Agate Geode
16 x 15.2 mm
$ 35.63
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thumb image of 64.2ct Fancy Crystal Cluster Violet Amethyst Geode (ID: 391825)
64.16 ct Amethyst Geode
29.5 x 23 mm
$ 64.16
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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'.

Certified Customer Reviews
Overall Rating -> 10 star ratings
Huge variety including unusual cuts and colors
Posted By Steffie in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have bought several stones and am very happy with the price points, selection and speed of delivery. Sometimes the quality is not quite what I expected but given the prices, I am overall satisfied.
Posted By in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
offer military prices
Posted By Frobb1968 in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Trustworthy company & site, great products.
Posted By KM in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have been ordering from GemSelect for at least 6 years. Every single order was perfect - every item was as advertized, in perfect condition and arrived well within the specified time frame. I have recommended them to several friends.
Posted By Jim in August, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Excellent company with excellent website!
Posted By Marcy in August, 2018
Source: Bizrate
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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

Size Comparison Chart