X
Gemstone Search

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All
0.05Ct Black Diamond, Round, Opaque

0.05Ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 17.51

View Details
1.12Ct Very Light Pink Morganite, Pear Shape, Vs-Si

1.12Ct Very Light Pink Morganite, Pear Shape, Vs-Si

8.6 x 6.3 mm

$ 59.14

View Details
4.86Ct Medium Pink Morganite, Oval, Transparent

4.86Ct Medium Pink Morganite, Oval, Transparent

13.1 x 10 mm

$ 58.32

View Details
14.65Ctw Black Spinel, Round, Opaque

14.65Ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 54.92

View Details
1.23Ct Berry Purple Spinel, Cushion, Vvs-Vs

1.23Ct Berry Purple Spinel, Cushion, Vvs-Vs

6.4 x 5.7 mm

$ 147.60

View Details
1.00Ct Medium Grey Cat's Eye Alexandrite, Oval, Opaque

1.00Ct Medium Grey Cat's Eye Alexandrite, Oval, Opaque

4.5 x 6.6 mm

$ 250.00

View Details
0.72Ct Medium Pink Morganite, Pear Shape, Vvs-Vs

0.72Ct Medium Pink Morganite, Pear Shape, Vvs-Vs

8 x 5 mm (calibrated)

$ 52.27

View Details
0.69Ct White Topaz, Oval, Vvs

0.69Ct White Topaz, Oval, Vvs

6 x 4.2 mm

$ 5.80

View Details
2.54Ct Medium Pink Morganite, Oval, Vs

2.54Ct Medium Pink Morganite, Oval, Vs

10 x 7.5 mm

$ 167.64

View Details
1.30Ct Warm Yellow Beryl, Trillion, Vvs

1.30Ct Warm Yellow Beryl, Trillion, Vvs

8 x 8 mm (calibrated)

$ 31.20

View Details
2.21Ct Light Yellow Beryl, Oval, Vvs

2.21Ct Light Yellow Beryl, Oval, Vvs

10 x 8 mm (calibrated)

$ 53.04

View Details
1.19Ct Medium Yellow Beryl, Round, Vvs

1.19Ct Medium Yellow Beryl, Round, Vvs

7 mm (calibrated)

$ 31.42

View Details
0.06Ct Black Diamond, Round, Opaque

0.06Ct Black Diamond, Round, Opaque

2.4 mm (calibrated)

$ 34.98

View Details
0.85Ct Light Golden Morganite, Oval, Vs

0.85Ct Light Golden Morganite, Oval, Vs

7.8 x 5.8 mm

$ 44.88

View Details
1.13Ct Light Gold Beryl, Oval, Vs

1.13Ct Light Gold Beryl, Oval, Vs

8 x 6 mm (calibrated)

$ 27.12

View Details
1.64Ct Deep Violet Spinel, Cushion, Vs
Spinel Product Video (744432)

1.64Ct Deep Violet Spinel, Cushion, Vs

6.7 x 6.5 mm

$ 196.80

View Details
1.26Ct Tuscany Yellow Beryl, Trillion, Vvs-Vs

1.26Ct Tuscany Yellow Beryl, Trillion, Vvs-Vs

8 x 8 mm (calibrated)

$ 30.24

View Details
1.54Ct Light Honey Yellow Beryl, Round, Vs

1.54Ct Light Honey Yellow Beryl, Round, Vs

8 mm (calibrated)

$ 36.96

View Details
1.42Ct Light Honey Yellow Beryl, Cushion, Vs

1.42Ct Light Honey Yellow Beryl, Cushion, Vs

8 x 6 mm (calibrated)

$ 37.49

View Details
4.50Ctw Clear White Topaz, Cushion, Vvs-Vs

4.50Ctw Clear White Topaz, Cushion, Vvs-Vs

4.6 x 4.6 mm

$ 29.70

View Details
18.25Ctw Black Spinel, Trillion, Opaque

18.25Ctw Black Spinel, Trillion, Opaque

9.8 x 9.6 mm

$ 120.46

View Details
1.03Ct Medium Light-Purple Spinel, Oval, Vvs-Vs
Spinel Product Video (752653)

1.03Ct Medium Light-Purple Spinel, Oval, Vvs-Vs

6.9 x 5.4 mm

$ 618.00

View Details
1.02Ct Light Golden Morganite, Oval, Vvs-Vs

1.02Ct Light Golden Morganite, Oval, Vvs-Vs

8 x 6 mm (calibrated)

$ 67.32

View Details
0.90Ct Very Light Pink Morganite, Pear Shape, Vs

0.90Ct Very Light Pink Morganite, Pear Shape, Vs

8.4 x 5.3 mm

$ 83.16

View Details
1 2 3
...
82
Choose Page
1 - 186

Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

I was looking for a small gift for a friend- the process is the same as every other time and was very simple, and she even got her gift early! On the downside, there's no way to easily keep track of multiple Shipping Addresses, so if I want to send a gift to Friend A and to Friend B, I have to overwrite everything and it's a fair bit clunky in that regard.

Posted By Jezzi in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image