90,000+Happy Customers
20+Years
WorldwideShipping
Cart
Free Report Included
Worldwide Shipping
30 Day Returns
Help Center Shipping Payment and Checkout Returns Certificates Contact Us
Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

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

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
Purple Untreated Gemstones
Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All
0.40ct Yellow Sphalerite, Oval, SI-I1

0.40ct Yellow Sphalerite, Oval, SI-I1

4.7 x 3.9 mm

$ 19.92

View Gem
8.73ct Green Prehnite, Fancy, Translucent

8.73ct Green Prehnite, Fancy, Translucent

16 x 12 mm (calibrated)

$ 14.35

View Gem
1.93ctw Orange Sunstone, Oval, Translucent

1.93ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 13.45

View Gem
0.19ctw White Diamond, Round, VVS-VS

0.19ctw White Diamond, Round, VVS-VS

2.9 mm (calibrated)

$ 345.21

View Gem
3.93ct Yellow Citrine, Pear Shape, VVS-VS

3.93ct Yellow Citrine, Pear Shape, VVS-VS

13 x 9 mm (calibrated)

$ 30.14

View Gem
29.01ct Yellow Obsidian, Pear Shape, Opaque

29.01ct Yellow Obsidian, Pear Shape, Opaque

31.5 x 21.1 mm

$ 25.43

View Gem
1.25ct Green Tourmaline, Emerald Cut, VS

1.25ct Green Tourmaline, Emerald Cut, VS

16.6 x 3.1 mm

$ 32.87

View Gem
6.28ct Green Peridot, Heart, VVS-VS
Peridot Product Video (746920)

6.28ct Green Peridot, Heart, VVS-VS

12 x 10.7 mm

$ 1,355.22

View Gem
0.66ct Yellow Citrine, Heart, VVS-VS

0.66ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.26

View Gem
62.94ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (724443)

62.94ct Violet Amethyst, Pear Shape, VVS

32.5 x 21.7 mm

$ 471.42

View Gem
14.95ct Green Serpentine, Round, Translucent

14.95ct Green Serpentine, Round, Translucent

16 mm (calibrated)

$ 32.01

View Gem
1.07ct Brown Color-Change Garnet, Oval, VVS-VS

1.07ct Brown Color-Change Garnet, Oval, VVS-VS

6.4 x 5.1 mm

$ 85.47

View Gem
3.70ct Yellow Rutile Topaz, Cushion, Transparent

3.70ct Yellow Rutile Topaz, Cushion, Transparent

10 x 8 mm (calibrated)

$ 76.78

View Gem
0.56ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.56ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.5 x 3.8 mm

$ 92.96

View Gem
21.56ct Black Nuummite, Oval, Opaque

21.56ct Black Nuummite, Oval, Opaque

22 x 14.6 mm

$ 94.70

View Gem
0.92ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.92ct Gray Cat'S Eye Alexandrite, Oval, Opaque

6 x 4 mm (calibrated)

$ 190.90

View Gem
2.88ctw White Topaz, Cushion, VVS-VS

2.88ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 15.78

View Gem
9.13ctw Yellow Citrine, Oval, VVS-VS

9.13ctw Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 54.81

View Gem
1.92ct Yellow Beryl, Round, VVS

1.92ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 42.07

View Gem
4.64ct Orange Sunstone, Oval, Translucent

4.64ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 28.13

View Gem
19.16ct Violet Amethyst, Emerald Cut, VVS

19.16ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 133.58

View Gem
3.93ct Multicolor Labradorite, Pear Shape, Translucent

3.93ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 8.68

View Gem
1.69ct White Opal, Oval, Transparent

1.69ct White Opal, Oval, Transparent

11.3 x 8.5 mm

$ 42.08

View Gem
2.06ct Green Tourmaline, Round, Transparent

2.06ct Green Tourmaline, Round, Transparent

7 mm (calibrated)

$ 35.31

View Gem
1 2 3
...
1488
Choose Page
1 - 1896

Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

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

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image