search
  • English speaking customer support only

    Toll Free - USA & Canada only:
    1-800-464-1640

    International:
    +66-39303404

  • Change Language
  • USD
Buy Customized Gemstone Lots

Buy 12 Carat Gems

Single

Pairs

Lots

Faceted

Cab

Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (852): 12 Carat Gems Clear All
Sort By:
Click for Details
Compare
1 pc
Add to Cart
Silver Pearl Gem - 13ct Spherical (ID: 338171)

Sphere / Ball Gray Pearl

13ct
12.1 mm
$ 129.70
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Pink Kunzite Gem - 11.8ct Cushion-Cut (ID: 482032)

Cushion Pink Kunzite

11.8ct
11.5 x 11.1 mm
$ 223.63
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Click for Product Video (450371)
Light Blue Aquamarine Gem - 11.9ct Octagon / Scissor Cut (ID: 450371)

Octagon / Emerald Cut Blue Aquamarine

11.9ct
17.4 x 10 mm
$ 2,967.50
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Green Seraphinite Gem - 11.9ct Round Cabochon (ID: 502849)

Round Green Seraphinite

11.93 ct (total 23.85ctw)
18.8 mm
$ 11.93
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Click for Product Video (326838)
Blue-Green Cat's Eye Aquamarine Gem - 11.8ct Oval Cabochon (ID: 326838)

Oval Green Cat's Eye Aquamarine

11.8ct
16 x 10.9 mm
$ 213.12
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Silver Pearl Gem - 11.8ct Baroque (ID: 333579)

Fancy Gray Pearl

11.8ct
13.1 mm
$ 129.50
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Blue Lapis Lazuli Gem - 11.6ct Oval Cabochon (ID: 503303)

Oval Blue Lapis Lazuli

11.6ct
17.3 x 12.1 mm
$ 18.61
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Blue Lapis Lazuli Gem - 11.6ct Oval Cabochon (ID: 503247)

Oval Blue Lapis Lazuli

11.6ct
17.2 x 12.4 mm
$ 18.60
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Click for Product Video (378197)
Violet Blue Tanzanite Gem - 12ct Cushion-Cut (ID: 378197)

Cushion Blue Tanzanite

12ct
13.1 x 12.8 mm
$ 6,123.75
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 12ct Marquise Slice (ID: 384798)

Marquise Bi-color Ruby in Fuchsite

12ct
28.6 x 15.5 mm
$ 82.10
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Click for Product Video (462139)
White Opal Gem - 11.9ct Oval Cabochon (ID: 462139)

Oval White Opal

11.9ct
17.7 x 13.7 mm
$ 478.69
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Click for Product Video (484388)
Cream Star Moonstone Gem - 12.5ct Oval Cabochon (ID: 484388)

Oval Cream Star Moonstone

12.5ct
15.3 x 13.2 mm
$ 50.04
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Pink Kunzite Gem - 11.8ct Oval Facet (ID: 409222)

Oval Pink Kunzite

11.8ct
17.6 x 10.9 mm
$ 236.40
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Click for Product Video (413680)
Violet to Blue Color-Change Fluorite Gem - 12.3ct Round Facet (ID: 413680)

Round Multicolor Color-Change Fluorite

12.3ct
14.1 mm
$ 306.25
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Click for Product Video (380107)
Yellow Orange Fire Opal Gem - 12.5ct Cushion Cabochon (ID: 380107)

Cushion Orange Fire Opal

12.5ct
17.3 x 14.2 mm
$ 438.20
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Cream Star Moonstone Gem - 11.6ct Round Cabochon (ID: 403189)

Round Cream Star Moonstone

11.6ct
13.3 mm
$ 40.88
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Yellow Golden Citrine Gem - 13ct Trillion Facet (ID: 498494)

Trillion Yellow Citrine

13ct
16.2 x 16.1 mm
$ 90.65
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Pink Coral Gem - 12.5ct Carved Rose (ID: 334124)

Fancy Pink Coral

12.5ct
29.5 x 20.1 mm
$ 137.72
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Multicolor Jasper Gem - 12.6ct Oval Cabochon (ID: 488554)

Oval Multicolor Jasper

12.56 ct (total 25.12ctw)
18.1 x 13.1 mm
$ 14.07
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Multicolor Fossil Coral Gem - 12.6ct Fancy Cabochon (ID: 510922)

Fancy Multicolor Fossil Coral

12.58 ct (total 25.15ctw)
23.6 x 11.1 mm
$ 40.99
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Black Gray Hematite Gem - 12.1ct Octagon Cabochon (ID: 498037)

Octagon / Emerald Cut Gray Hematite

12.1ct
20.2 x 15.3 mm
$ 10.12
Item in Stock
12 Carat Gems
Buy gems by weight. Select the best 12 carat gems from a wide array of colored stones, including rare gem types such as scapolite, black opal and pietersite. Also available are beautiful and popular faceted gems, including tanzanite, zircon and tourmaline. Large 12-carat gems make perfect statement stones, whether they are worn as a necklace pendant, ring or another jewelry design. Browse the largest selection of natural loose colored gemstones available in 12 carats. From here, you can use our filters at the top or on the left-hand side to find gems by gem type, color, shape, cut and so on. For example, select 'jadeite' to see all of our 12-carat jadeite gems. Select 'green' to shop for 12-carat green gems. You can also filter by single, pairs, lots, faceted gems or cabochons by using the check boxes at the top.
Certified Customer Reviews
Overall Rating -> 10 star ratings
I love that I was able to find a site that offers REAL gemstones. I love the pictures provided of the gems so I can look at each one from different angles, I love the variety of gems on the site & I love the ability to narrow down my search to look at certain gems that fit my criteria.
Posted By Risuna in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Always a pleasure to do business with you. Gems have always been as pictured, certificate option is appreciated.
Posted By Lawrencekramer in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
My experience with gemselect was awesome so far. I had a few questions about their website and making orders and they replied quickly and were happy to help. I have not received the items I ordered yet as I just ordered them this morning. Although, I truly feel I am going to be a very happy customer once I do receive my items. Gemselect guarantees all their items and have a great return policy just incase. The have a vast selection of all kinds of stones and not to mention their prices are much better than some other websites. Thanks Gemselect I’ll be doing business here from now on!
Posted By Jpapaleo in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I was very happy on the quality of the gemstones I recieved from GemSelect, I will deffinetly buy again.
Posted By Mckeg in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great, easy to use, efficient!
Posted By Olive in January, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Great selection. Love the many learning features like articles and gem information. Prices competitive for natural stones. I do miss not having a selection of lab-made stones, CZ’s, etc, which are useful when price and cost are factors.
Posted By Dirk in January, 2019
Source: Bizrate
Popular Gemstones
All Gemstones (141)
A B C D E F G H I J K L M O P Q R S T V Z
English speaking customer support only

Toll Free - USA & Canada only:
1-800-464-1640

International:
+66-39303404

Save Money
No shipping Fees for Additional Items!
$6.99 Worldwide Shipping

Update Translation
 
Current Value
New Value
GemSelect Gemstones
X Close Window
Colored Gemstones
X Close Window
Colored Gemstones
X Close Window
Colored Gemstones
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