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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (11325): Phenomenal Gemstones - Star Sapphire, Andalusite, Kyanite, Rose Quartz, Tanzanite, Rainbow Moonstone, Iolite, Star Ruby, Star Moonstone, Moonstone, Cat's Eye Apatite, Fire Opal, Color Change Garnet, Moss Opal, Opal, Opal Doublet, Aventurine, Cat's Eye Tourmaline, Tiger's Eye, Color Change Sapphire, Star Rose Quartz, Pearl, Cat's Eye Scapolite, Labradorite, Fire Agate, Scapolite, Star Diopside, Cat's Eye Aquamarine, Star Sunstone, Cat's Eye Diaspore, Cat's Eye Chrysoberyl, Star Garnet, Alexandrite, Cat's Eye Quartz, Tiger's Eye Matrix, Cat's Eye Sillimanite, Charoite, Rainbow Pyrite Druzy, Obsidian, Seraphinite, Color-Change Diaspore, Boulder Opal, Ammolite, Pietersite, Chocolate Opal, Black Opal, Cat's Eye Moonstone, Star Lemon Quartz, Hawk's Eye, Actinolite Cat's Eye, Cat's Eye Beryl, Mother of Pearl, Color-Change Fluorite, Opal in Matrix Clear All
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0.8ct Square Step-Cut Green to Pink Color-Change Diaspore Gem (ID: 478612)
0.82 ct Color-Change Diaspore
5.2 x 4.9 mm
$ 26.27
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1ct Oval Facet Reddish Orange Fire Opal Gem (ID: 366894)
1.00 ct Fire Opal
8.3 x 6.6 mm
$ 39.00
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27.7ct Fancy Cabochon Multicolor Ammolite Gem (ID: 453598)
27.74 ct Ammolite
29.5 x 19.4 mm
$ 416.10
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15.9ct Oval Cabochon Orange Cream Star Moonstone Gem (ID: 262109)
15.93 ct Star Moonstone
14.2 x 13.4 mm
$ 63.72
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2 pcs
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0.9ct Oval Facet Orange Fire Opal Gem (ID: 453905)
0.94 ct (total 1.87ctw) Fire Opal
8 x 6.1 mm
$ 49.26
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2 pcs
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1ct Trillion Facet Violet Blue Tanzanite Gem (ID: 421169)
0.98 ct (total 1.96ctw) Tanzanite
7.1 x 7 mm
$ 227.73
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2 pcs
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5.7ct Asscher Cut Pink Rose Quartz Gem (ID: 393191)
5.65 ct (total 11.30ctw) Rose Quartz
11.3 x 11.2 mm
$ 56.50
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9 pcs
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0.2ct Round Facet Multicolor Andalusite Gem (ID: 279894)
0.24 ct (total 2.16ctw) Andalusite
4 mm
$ 108.00
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7.1ct Oval Cabochon Cream Star Moonstone Gem (ID: 504080)
7.12 ct Star Moonstone
14 x 8.7 mm
$ 15.24
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30.7ct Fancy Cabochon Multicolor Fire Agate Gem (ID: 490655)
30.74 ct Fire Agate
28.8 x 19.4 mm
$ 169.07
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123.4ct Oval Cabochon Gold Sheen Black Obsidian Gem (ID: 447905)
123.42 ct Obsidian
65.1 x 33.1 mm
$ 123.42
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6.1ct Trillion Cabochon Multicolor Ammolite Gem (ID: 284804)
6.14 ct Ammolite
16.2 x 14.7 mm
$ 61.40
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4 pcs
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0.5ct Round Facet Green to Pink Color-Change Diaspore Gem (ID: 454600)
0.48 ct (total 1.93ctw) Color-Change Diaspore
4.7 mm
$ 61.76
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10 pcs
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0.2ct Pear Facet Violet Blue Tanzanite Gem (ID: 454124)
0.18 ct (total 1.80ctw) Tanzanite
5 x 3 mm
$ 63.00
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4 pcs
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1.4ct Asscher Cut Pink Rose Quartz Gem (ID: 400932)
1.41 ct (total 5.64ctw) Rose Quartz
6.7 x 6.7 mm
$ 28.20
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19.1ct Round Cabochon Cream Cat's Eye Moonstone Gem (ID: 481520)
19.14 ct Cat's Eye Moonstone
16.2 mm
$ 93.79
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6.9ct Oval Cabochon Cream Star Moonstone Gem (ID: 418563)
6.90 ct Star Moonstone
16.3 x 9.2 mm
$ 27.60
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91.7ct Fancy Cabochon Violet Charoite Gem (ID: 344690)
91.73 ct Charoite
36.1 x 26.2 mm
$ 137.60
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4 pcs
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19.5ct Drilled Sphere Green Seraphinite Gem (ID: 447456)
19.45 ct (total 77.78ctw) Seraphinite
14.2 mm
$ 116.67
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19.9ct Round Facet Green to Pink Color-Change Diaspore Gem (ID: 381559)
19.90 ct Color-Change Diaspore
15.4 mm
$ 6,500.92
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2ct Square Cabochon Blue-Sheen Gray Labradorite Gem (ID: 505257)
1.98 ct Labradorite
6.7 x 6.6 mm
$ 2.08
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Phenomenal Gemstones
Phenomenal gemstones are extremely rare and highly prized; truly one of nature's most impressive creations. Gemstone optical phenomena is a result which varies, due to the way light either interacts or interferes with the structural anatomy of any given gemstone. Light interaction or interference can be seen in the form of reflection, refraction, diffraction, scattering, absorption and transmission. There are many different forms of gemstone phenomena, while some effects are quite common, simple and subtle; some are absolutely astounding and dramatic.

Phenomenal gems make excellent gifts for both novice and veteran gem collectors. Most would expect such exotic gemstones to come with a hefty price tag, but many phenomenal gems are surprisingly very affordable. Some examples of gemstone phenomena and popular gem types known to exhibit phenomenal qualities include adularescence, aventurescence, chatoyancy, asterism, iridescence, labradorescence, color change, play of color, pleochroism, fluorescence and tenebrescence.

Certified Customer Reviews
Overall Rating -> 9 star ratings
My selection was made quickly and efficiently.
Posted By JimC in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
GemSelect has a great selection at reasonable prices. Gemstones are always as beautiful as pictured.
Posted By GemLover in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Colors and qualities of gems are very well represented online. Easy to use website. Great selections!
Posted By in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This was my second purchase from GemSelect and definitely won’t be my last! They have a very wide variety of gems and you can always find what you are looking for with ease and the prices are very good.
Posted By Jill in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Loved the wide selection of product
Posted By Miki in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
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!
Posted By Ptcmom in November, 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