X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

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
0.55ct Red Spinel, Cushion, VVS-VS

0.55ct Red Spinel, Cushion, VVS-VS

5.2 x 4.6 mm

$ 38.35

View Gem
4.01ct Blue Aquamarine, Pear Shape, Translucent

4.01ct Blue Aquamarine, Pear Shape, Translucent

13 x 9 mm (calibrated)

$ 83.21

View Gem
0.60ct Purple Spinel, Cushion, VVS-VS

0.60ct Purple Spinel, Cushion, VVS-VS

5 x 4 mm (calibrated)

$ 41.83

View Gem
0.06ct Black Diamond, Round, Opaque

0.06ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 20.53

View Gem
1.32ct Purple Spinel, Marquise, VVS-VS
Spinel Product Video (349481)

1.32ct Purple Spinel, Marquise, VVS-VS

9.7 x 5.6 mm

$ 219.12

View Gem
1.03ct Purple Spinel, Cushion, VS
Spinel Product Video (725541)

1.03ct Purple Spinel, Cushion, VS

5.8 x 4.7 mm

$ 415.00

View Gem
2.85ct Green Cat'S Eye Beryl, Oval, Translucent
Cat's Eye Beryl Product Video (735067)

2.85ct Green Cat'S Eye Beryl, Oval, Translucent

10.1 x 7.5 mm

$ 497.52

View Gem
1.02ct Yellow Beryl, Pear Shape, VVS

1.02ct Yellow Beryl, Pear Shape, VVS

9 x 6 mm (calibrated)

$ 22.35

View Gem
1.08ct Purple Spinel, Cushion, VVS
Spinel Product Video (744427)

1.08ct Purple Spinel, Cushion, VVS

6.7 x 5.9 mm

$ 107.57

View Gem
1.04ct Pink Morganite, Round, VVS-VS

1.04ct Pink Morganite, Round, VVS-VS

7 mm (calibrated)

$ 40.40

View Gem
1.89ct Yellow Rutile Topaz, Pear Shape, Transparent

1.89ct Yellow Rutile Topaz, Pear Shape, Transparent

10.8 x 6.2 mm

$ 39.22

View Gem
1.19ct Yellow Beryl, Trillion, VS

1.19ct Yellow Beryl, Trillion, VS

8 x 8 mm (calibrated)

$ 28.44

View Gem
1.76ctw Multicolor Andalusite, Oval, VS

1.76ctw Multicolor Andalusite, Oval, VS

5 x 3.2 mm

$ 94.02

View Gem
1.04ct Purple Spinel, Oval, VS

1.04ct Purple Spinel, Oval, VS

7.4 x 5.5 mm

$ 73.29

View Gem
2.06ctw Multicolor Andalusite, Oval, VS

2.06ctw Multicolor Andalusite, Oval, VS

5.2 x 4.2 mm

$ 110.46

View Gem
7.36ctw Black Spinel, Round, Opaque

7.36ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 32.25

View Gem
0.95ct Yellow Morganite, Cushion, VS

0.95ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 57.25

View Gem
1.10ct Purple Sapphire, Cushion, VS
Sapphire Product Video (447843)

1.10ct Purple Sapphire, Cushion, VS

7.3 x 5.1 mm

$ 580.09

View Gem
2.06ct Yellow Beryl, Oval, VS

2.06ct Yellow Beryl, Oval, VS

10 x 8 mm (calibrated)

$ 49.24

View Gem
0.24ct Brown Color-Change Sapphire, Emerald Cut, VVS

0.24ct Brown Color-Change Sapphire, Emerald Cut, VVS

3.8 x 2.8 mm

$ 19.92

View Gem
1.58ct Yellow Beryl, Round, VVS

1.58ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 31.47

View Gem
4.18ct Pink Morganite, Pear Shape, Transparent

4.18ct Pink Morganite, Pear Shape, Transparent

12 x 9 mm

$ 17.35

View Gem
1.09ct Pink Morganite, Round, VS

1.09ct Pink Morganite, Round, VS

6.5 mm (calibrated)

$ 95.53

View Gem
1.27ct Purple Spinel, Cushion, VVS

1.27ct Purple Spinel, Cushion, VVS

6.5 x 6.3 mm

$ 69.07

View Gem
1 2 3
...
75
Choose Page
1 - 188

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 -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image