search
  • Sign In
    Sign Up
  • English speaking customer support only

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

    International:
    +66-39303404

  • Change Language
  • USD

Buy Round Shape 3.5 mm Gems

(294)
Gem Type Weight Size Clarity Price Origin
More
Single
Pairs
Lots
Faceted
Cabochons
Sort By:
Clear All
Click for Details
84 pcs
Select pcs
Add to Cart
Buy Now
Medium Red Sapphire Gem - 0.3ct Round Mixed-Cut (ID: 511306)

1 pc (avg. 0.30 ct) Red Sapphire

3.4 mm
$ 8.97
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Buy Now
Click for Product Video (543902)
Lemon Yellow Diamond Gem - 0.2ct Diamond-Cut (ID: 543902)

Round Yellow Diamond

0.2ct
3.5 mm
$ 279.92
Item in Stock
Click for Details
314 pcs
Select pcs
Add to Cart
Buy Now
Medium Light Green Demantoid Garnet Gem - 0.2ct Diamond-Cut (ID: 519036)

1 pc (avg. 0.21 ct) Green Demantoid Garnet

3.6 mm
$ 10.06
Item in Stock
Click for Details
72 pcs
Select pcs
Add to Cart
Buy Now
Royal Blue Sapphire Gem - 0.3ct Round Cabochon (ID: 503842)

1 pc (avg. 0.27 ct) Blue Sapphire

3.5 mm
$ 9.19
Item in Stock
Click for Details
Compare
6 pcs
Add to Cart
Buy Now
Deep Azure Apatite Gem - 0.2ct Round Facet (ID: 502600)

Round Blue Apatite

0.21 ct (total 1.24ctw)
3.5 mm
$ 24.80
Item in Stock
Click for Details
Compare
20 pcs
Add to Cart
Buy Now
Multicolor Andalusite Gem - 0.2ct Diamond-Cut (ID: 381793)

Round Multicolor Andalusite

0.18 ct (total 3.57ctw)
3.5 mm
$ 143.12
Item in Stock
Click for Details
Compare
5 pcs
Add to Cart
Buy Now
Multicolor Sapphire Gem - 0.3ct Diamond-Cut (ID: 424513)

Round Multicolor Sapphire

0.25 ct (total 1.26ctw)
3.6 mm
$ 50.40
Item in Stock
Click for Details
Compare
20 pcs
Add to Cart
Buy Now
Multicolor Andalusite Gem - 0.2ct Diamond-Cut (ID: 381951)

Round Multicolor Andalusite

0.18 ct (total 3.61ctw)
3.5 mm
$ 144.72
Item in Stock
Click for Details
Compare
6 pcs
Add to Cart
Buy Now
Yellow Sapphire Gem - 0.2ct Diamond-Cut (ID: 422801)

Round Yellow Sapphire

0.20 ct (total 1.18ctw)
3.5 mm
$ 35.40
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Buy Now
Click for Product Video (556556)
Jam Red Ruby Gem - 0.2ct Round Facet (ID: 556556)

Round Red Ruby

0.23 ct (total 0.45ctw)
3.6 mm
$ 51.89
Item in Stock
Click for Details
29 pcs
Select pcs
Add to Cart
Buy Now
Light Bubblegum Pink Sapphire Gem - 0.2ct Round Cabochon (ID: 514075)

1 pc (avg. 0.22 ct) Pink Sapphire

3.4 mm
$ 5.93
Item in Stock
Click for Details
Compare
20 pcs
Add to Cart
Buy Now
Multicolor Andalusite Gem - 0.2ct Diamond-Cut (ID: 381927)

Round Multicolor Andalusite

0.18 ct (total 3.54ctw)
3.6 mm
$ 141.92
Item in Stock
Click for Details
Compare
10 pcs
Add to Cart
Buy Now
Multicolor Sapphire Gem - 0.2ct Round Facet (ID: 321744)

Round Multicolor Sapphire

0.23 ct (total 2.25ctw)
3.5 mm
$ 82.69
Item in Stock
Click for Details
Compare
6 pcs
Add to Cart
Buy Now
Medium Blue Apatite Gem - 0.2ct Round Facet (ID: 502604)

Round Blue Apatite

0.18 ct (total 1.09ctw)
3.6 mm
$ 21.80
Item in Stock
Click for Details
Compare
10 pcs
Add to Cart
Buy Now
Multicolor Sapphire Gem - 0.3ct Round Cabochon (ID: 347083)

Round Multicolor Sapphire

0.30 ct (total 3.01ctw)
3.6 mm
$ 75.25
Item in Stock
Click for Details
Compare
6 pcs
Add to Cart
Buy Now
Click for Product Video (495672)
Blood Red Ruby Gem - 0.2ct Round Facet (ID: 495672)

Round Red Ruby

0.22 ct (total 1.33ctw)
3.6 mm
$ 159.60
Item in Stock
Click for Details
Compare
6 pcs
Add to Cart
Buy Now
Dark Red Ruby Gem - 0.2ct Round Facet (ID: 495580)

Round Red Ruby

0.23 ct (total 1.40ctw)
3.5 mm
$ 168.00
Item in Stock
Click for Details
Compare
6 pcs
Add to Cart
Buy Now
Deep Red Ruby Gem - 0.2ct Round Facet (ID: 496171)

Round Red Ruby

0.24 ct (total 1.46ctw)
3.5 mm
$ 182.50
Item in Stock
Click for Details
Compare
10 pcs
Add to Cart
Buy Now
Medium Orange Sapphire Gem - 0.2ct Diamond-Cut (ID: 423371)

Round Orange Sapphire

0.23 ct (total 2.25ctw)
3.6 mm
$ 67.50
Item in Stock
Click for Details
Compare
20 pcs
Add to Cart
Buy Now
Multicolor Andalusite Gem - 0.2ct Diamond-Cut (ID: 381930)

Round Multicolor Andalusite

0.17 ct (total 3.44ctw)
3.5 mm
$ 137.91
Item in Stock
Click for Details
Compare
6 pcs
Add to Cart
Buy Now
Yellow Sapphire Gem - 0.2ct Diamond-Cut (ID: 422851)

Round Yellow Sapphire

0.20 ct (total 1.19ctw)
3.6 mm
$ 35.70
Item in Stock
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Round Shape 3.5 mm Gems

What's Great About GemSelect's 3.5 mm Gemstones and How Can They be Used?

Are you looking to buy Loose Gemstones in calibrated 3.5mm sizes? Look no further GemSelect has the stones you want. GemSelect’s Round Shape 3.5mm gems are practical for numerous designs and handy because of the calibrated size and the large selection we provide. The design ideas we suggest are; Petite Stacking rings, Pave Set rings, Vintage-Style Drop Earrings, Studs, Pave Set Pendants, and Pave Set Rings. GemSelect's 3.5mm calibrated stones are also great for repairs that require replacement stones in an existing piece. GemSelects calibrated stones in this category range between 3.4mm and 3.6mm in size.

How Are 3.5 mm Gemstones Available at GemSelect?

Buy 3.5 mm Sapphire Multicolored Lots and Multicolored Andalusite lots which are expertly color matched to make your designs extraordinary. GemSelects Supply of 3.5mm calibrated jewels includes a large selection of Ruby, Sapphire, Demantoid Garnet, Andalusite, and smaller amounts of other types of gems; such as Emerald, Citrine, Color-Change Sapphire, Diamond, Spessartite Garnet, and Tsavorite Garnet. Our colored and white gemstones in this category are available in single stones, pairs and lots. Sapphires in this category are available in both Cabochon and Faceted cuts. The availability of colors we offer in the 3.5mm size includes; Blue, Color-Change, Green, Multicolor, Orange, Pink, Red, White, and Yellow Colored Gemstones.

Certified Customer Reviews
Overall Rating -> 9 star ratings
The opals I ordered are absolutely beautiful, very fiery and well-cut. The pictures online didn’t do them justice. Shipping did take longer than expected (I chose the standard option), but the gemstones I received were definitely worth the wait.
Posted By Hannah in January, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
Was a little darker orange than I wanted, but still lovely.
Posted By Jones in January, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
I have purchased gems from Gem Select twice a year, for more than a few years.Gem select is the best place to buy gems. The selection and presentation are genuine. What you see is what you get, keeping in mind the carat weight, and measurements they have listed. Never have I been disappointed with any gem I have received from them. Nan
Posted By Nan in January, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
the site is great and the merchandise looks awesome
Posted By Jeff in January, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
GemSelect has a great selection of smaller cabochons. Many other retailers do not. Plus, the photo of the stone is the one you are purchasing. Shipping from Thailand is nearly as fast as from within the US. Stones are tightly and neatly packaged.
Posted By Rich75 in January, 2020
Source: Bizrate
Overall Rating -> 9 star ratings
Picking a garnet to match a setting. Good selection, It would have been better if a side by side color comparison was possible.
Posted By Goose in January, 2020
Source: Bizrate
Sign up for our Newsletter
More Shapes
  • Asscher Cut
  • Baguette / Scissor Cut
  • Baguette Cabochon
  • Baguette Checkerboard
  • Baguette Crystal Cluster
  • Baguette Facet
  • Baguette Rose-Cut
  • Baguette Step Cut
  • Baguette Sugarloaf Cabochon
  • Baroque
  • Barrel
  • Barrel / Checkerboard
  • Barrel / Full-Round
  • Barrel / Scissor Cut
  • Barrel Cabochon
  • Barrel Rose Cut
  • Bear Carving with Hole
  • Bird Carving
  • Briolette
  • Briolette with Hole
  • Carved Baguette
  • Carved Cameo
  • Carved Cushion
  • Carved Elephant
  • Carved Fancy
  • Carved Fish
  • Carved Fish with Hole
  • Carved Flower
  • Carved Fruit
  • Carved Half Heart
  • Carved Half Moon
  • Carved Heart
  • Carved Heart Cabochon
  • Carved Leaf
  • Carved Marquise
  • Carved Marquise Cabochon
  • Carved Octagon
  • Carved Oval
  • Carved Oval Cabochon
  • Carved Owl
  • Carved Pear
  • Carved Pear Cabochon
  • Carved Rhomb
  • Carved Rose
  • Carved Rose with Half Drilled Hole
  • Carved Round
  • Carved Round Bar
  • Carved Round Cabochon
  • Carved Sheep
  • Carved Shell
  • Carved Square
  • Carved Teardrop
  • Carved Trillion
  • Carved Turtle
  • Cushion Buff-Top
  • Cushion Cabochon
  • Cushion Carved Medusa Cameo
  • Cushion Checkerboard
  • Cushion Checkerboard (double sided)
  • Cushion Concave Fantasy Cut
  • Cushion Crystal Cluster
  • Cushion Mixed Cut
  • Cushion Rose-Cut
  • Cushion Shape Sugarloaf Cabochon
  • Cushion Sugarloaf Cabochon
  • Cushion-Cut
  • Diamond-Cut
  • Drilled Faceted Sphere
  • Drilled Sphere
  • Drilled Square Rondelle Slice
  • Fancy Cabochon
  • Fancy Carved Cushion
  • Fancy Carved Oval
  • Fancy Carved Pear
  • Fancy Carved Round
  • Fancy Carved Trillion
  • Fancy Carving
  • Fancy Crystal Cluster
  • Fancy Facet
  • Fancy Fantasy Carved Leaf
  • Fancy Fantasy Carving
  • Fancy Slice
  • Fancy Star Facet
  • Fancy-Cut
  • Fantasy Carved Flower
  • Fantasy Carved Flower Cut
  • Fantasy Carved Leaf
  • Flower Carving
  • Flower-Cut
  • Half Heart Cabochon
  • Half Heart Facet
  • Half Moon Cabochon
  • Half Moon Facet-Cut
  • Half Moon Faceted
  • Half-Drilled Briolette
  • Half-Drilled Sphere
  • Heart Cabochon
  • Heart Checkerboard (double sided)
  • Heart Facet
  • Heart Rose-Cut
  • Hexagon Cut
  • Marquise Buff-Top
  • Marquise Cabochon
  • Marquise Checkerboard
  • Marquise Checkerboard (double sided)
  • Marquise Facet
  • Marquise Mixed Cut
  • Marquise Slice
  • Marquise Sugarloaf Cabochon
  • Octagon / Scissor Cut
  • Octagon Cabochon
  • Octagon Checkerboard
  • Octagon Facet
  • Octagon Step Cut
  • Oval Buff-Top
  • Oval Cabochon
  • Oval Cabochon with Hole
  • Oval Carved Cameo
  • Oval Checkerboard
  • Oval Checkerboard (double sided)
  • Oval Concave Cut
  • Oval Crystal Cluster
  • Oval Diamond-Cut
  • Oval Facet
  • Oval Fancy Facet
  • Oval Fantasy Concave Cut
  • Oval Mixed Cut
  • Oval Portuguese-Cut
  • Oval Rose-Cut
  • Oval Slice
  • Pear Cabochon
  • Pear Checkerboard
  • Pear Checkerboard with Hole
  • Pear Concave Cut
  • Pear Concave Fantasy Cut
  • Pear Crystal Cluster
  • Pear Double-Sided Checkerboard
  • Pear Facet
  • Pear Shape Sugarloaf Cabochon
  • Pear Slice
  • Pencil
  • Pencil Cut
  • Pentagon Facet
  • Princess-Cut
  • Rhomb Cabochon
  • Rhomb Checkerboard
  • Rhomb Checkerboard (Double-Sided)
  • Rhomb Facet
  • Rondelle
  • Round Buff-Top
  • Round Cabochon
  • Round Checkerboard
  • Round Checkerboard (double sided)
  • Round Concave Cut
  • Round Concave Fantasy Cut
  • Round Drilled Checkerboard (Double Sided)
  • Round Drilled Rondelle
  • Round Facet
  • Round Mixed Cut
  • Round Mixed-Cut
  • Round Petal Cut
  • Round Portuguese-Cut
  • Round Rose-Cut
  • Round Rose-Cut (double sided)
  • Round Slice
  • Shark Fin Cabochon
  • Shield Cabochon
  • Shield Checkboard
  • Spherical
  • Square / Scissor Cut
  • Square Cabochon
  • Square Facet
  • Square Rose-Cut
  • Square Step-Cut
  • Square Sugarloaf Cabochon
  • Square with Hole
  • Tapered Baguette
  • Tapered Baguette Cabochon
  • Teardrop Cabochon
  • Trapezoid
  • Trapezoid Cabochon
  • Trapezoid Checkerboard
  • Triangle
  • Triangle Cabochon
  • Trillion Cabochon
  • Trillion Checkerboard
  • Trillion Concave Cut
  • Trillion Concave Fantasy Cut
  • Trillion Crystal Cluster
  • Trillion Facet
  • Trillion Rose-Cut
  • Trillion Shape Sugarloaf Cabochon
  • Undrilled Briolette Teardrop
Popular Gemstones
  • Sapphire
  • Emerald
  • Ruby
  • Aquamarine
  • Zircon
  • Opal
  • Topaz
  • Tourmaline
  • Garnet
  • Amethyst
  • Citrine
  • Tanzanite
All Gemstones (144)
A B C D E F G H I J K L M N O P Q R S T V Z
  • Actinolite Cat's Eye
  • Agate
  • Agate Geode
  • Almandine Garnet
  • Amazonite
  • Amethyst
  • Ametrine
  • Ammolite
  • Andalusite
  • Andesine Labradorite
  • Apatite
  • Aquamarine
  • Aventurine
  • Beryl
  • Black Opal
  • Bloodstone
  • Boulder Opal
  • Calcite
  • Carnelian
  • Cat's Eye Apatite
  • Cat's Eye Aquamarine
  • Cat's Eye Augite
  • Cat's Eye Gemstones
  • Cat's Eye Moonstone
  • Cat's Eye Opal
  • Cat's Eye Scapolite
  • Chalcedony
  • Charoite
  • Chocolate Opal
  • Chrome Diopside
  • Chrome Tourmaline
  • Chrysoberyl
  • Chrysocolla
  • Chrysoprase
  • Citrine
  • Clinohumite
  • Color-Change Diaspore
  • Color-Change Fluorite
  • Color-Change Garnet
  • Color-Change Sapphire
  • Coral
  • Demantoid Garnet
  • Dendritic Agate
  • Diamond
  • Druzy Amethyst
  • Druzy Azurite
  • Emerald
  • Enstatite
  • Fire Agate
  • Fire Opal
  • Fluorite
  • Fossil Coral
  • Garnet
  • Golden Beryl
  • Grandidierite
  • Grossularite Garnet
  • Hawk's Eye
  • Hematite
  • Hemimorphite Druzy
  • Hessonite Garnet
  • Hiddenite
  • Howlite
  • Idocrase
  • Imperial Topaz
  • Iolite
  • Jade Gemstones
  • Jadeite
  • Jasper
  • Kornerupine
  • Kunzite
  • Kyanite
  • Labradorite
  • Lapis Lazuli
  • Larimar
  • Malachite
  • Malaya Garnet
  • Mali Garnet
  • Maw-Sit-Sit
  • Moonstone
  • Morganite
  • Moss Opal
  • Mother of Pearl
  • Mystic Quartz
  • Mystic Topaz
  • Nuummite
  • Obsidian
  • Opal
  • Opal Doublet
  • Opal in Matrix
  • Pearl
  • Peridot
  • Pietersite
  • Prehnite
  • Pyrite
  • Pyrope Garnet
  • Quartz
  • Quartz Cat's Eye
  • Quartz With Marcasite
  • Rainbow Moonstone
  • Rainbow Pyrite
  • Rhodochrosite
  • Rhodolite Garnet
  • Rose Quartz
  • Rubellite Tourmaline
  • Ruby
  • Ruby in Fuchsite
  • Ruby-Zoisite
  • Rutile Quartz
  • Sapphire
  • Scolecite
  • Seraphinite
  • Serpentine
  • Sillimanite
  • Sillimanite Cat's Eye
  • Smithsonite
  • Smoky Quartz
  • Snowflake Obsidian
  • Sodalite
  • Spectrolite
  • Spessartite Garnet
  • Sphalerite
  • Sphene
  • Spinel
  • Star Diopside
  • Star Garnet
  • Star Gemstones
  • Star Lemon Quartz
  • Star Moonstone
  • Star Rose Quartz
  • Star Ruby
  • Star Sapphire
  • Star Sunstone
  • Strawberry Quartz
  • Sugilite
  • Sunstone
  • Tanzanite
  • Tiger's Eye
  • Tiger's Eye Matrix
  • Topaz
  • Tourmaline
  • Tsavorite Garnet
  • Turquoise
  • Variscite
  • Zircon
Main Categories
  • New Arrivals
  • Gemstone Lots
  • Calibrated Gemstones
  • Gemstones By Piece
  • Top Grade Gems
  • Matching Pairs
  • Cabochon Gemstones
  • Drilled Gems, Briolettes and Beads
  • Birthstones
  • Gemstone Carvings
  • Fancy Gemstones
  • Star Gemstones
  • Unheated Sapphire
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!
$8.90 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