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
1.74ct Green Tourmaline, Oval, Transparent

1.74ct Green Tourmaline, Oval, Transparent

8.3 x 6.3 mm

$ 29.83

View Gem
18.54ct Multicolor Agate, Oval, Opaque

18.54ct Multicolor Agate, Oval, Opaque

20 x 17.4 mm

$ 18.47

View Gem
6.88ct Multicolor Fire Agate, Fancy, Opaque

6.88ct Multicolor Fire Agate, Fancy, Opaque

15.4 x 11 mm

$ 51.71

View Gem
2.33ct Green Sphene, Oval, Transparent

2.33ct Green Sphene, Oval, Transparent

9 x 7 mm (calibrated)

$ 11.60

View Gem
0.93ct Yellow Beryl, Oval, VVS-VS

0.93ct Yellow Beryl, Oval, VVS-VS

7.2 x 5.2 mm

$ 23.16

View Gem
1.66ct Red Strawberry Quartz, Oval, Transparent

1.66ct Red Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 12.82

View Gem
1.76ct Yellow Citrine, Trillion, VS

1.76ct Yellow Citrine, Trillion, VS

8 x 8 mm (calibrated)

$ 13.50

View Gem
5.25ct Yellow Citrine, Oval, VVS-VS

5.25ct Yellow Citrine, Oval, VVS-VS

14.1 x 10.6 mm

$ 31.81

View Gem
0.55ct Orange Spessartite Garnet, Oval, VS
Spessartite Garnet Product Video (684426)

0.55ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 13.57

View Gem
19.44ct Multicolor Jasper, Oval, Opaque

19.44ct Multicolor Jasper, Oval, Opaque

23.9 x 14.5 mm

$ 12.18

View Gem
2.60ctw White Topaz, Oval, Transparent

2.60ctw White Topaz, Oval, Transparent

10.2 x 4.2 mm

$ 14.24

View Gem
1.17ct Yellow Morganite, Oval, VVS-VS

1.17ct Yellow Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 64.09

View Gem
4.68ct Yellow Citrine, Oval, VS
Citrine Product Video (559915)

4.68ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 35.90

View Gem
2.89ctw Red Pyrope Garnet, Emerald Cut, VS

2.89ctw Red Pyrope Garnet, Emerald Cut, VS

5.7 x 3.8 mm

$ 22.16

View Gem
0.73ct Red Pyrope Garnet, Pear Shape, VVS-VS

0.73ct Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 5.82

View Gem
3.55ct Pink Strawberry Quartz, Round, Translucent

3.55ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 27.23

View Gem
46.41ct Multicolor Rhodochrosite, Sphere / Ball, Opaque
Rhodochrosite Product Video (447505)

46.41ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

16.6 mm

$ 101.69

View Gem
1.88ct Green Tourmaline, Cushion, SI

1.88ct Green Tourmaline, Cushion, SI

10.8 x 5.2 mm

$ 94.00

View Gem
0.86ct Red Rhodolite Garnet, Oval, VS

0.86ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 22.84

View Gem
0.51ct Violet Amethyst, Emerald Cut, VS

0.51ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 2.96

View Gem
1.39ct Brown Smoky Quartz, Round, VVS

1.39ct Brown Smoky Quartz, Round, VVS

8 mm (calibrated)

$ 6.09

View Gem
0.04ct Black Diamond, Round, Opaque

0.04ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 11.62

View Gem
0.57ct Red Pyrope Garnet, Heart, VVS-VS

0.57ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 14.19

View Gem
4.35ctw Green Prehnite, Oval, Transparent

4.35ctw Green Prehnite, Oval, Transparent

6.9 x 5.3 mm

$ 47.66

View Gem
1 2 3
...
1135
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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

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