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
1.46ct Orange Hessonite Garnet, Oval, VS

1.46ct Orange Hessonite Garnet, Oval, VS

7.6 x 6.3 mm

$ 29.08

View Gem
0.79ct Yellow Citrine, Marquise, Transparent

0.79ct Yellow Citrine, Marquise, Transparent

9.4 x 4.9 mm

$ 5.51

View Gem
1.38ct Multicolor Opal, Oval, Translucent

1.38ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 31.03

View Gem
4.60ct Multicolor Coral, Oval, Translucent

4.60ct Multicolor Coral, Oval, Translucent

14.1 x 11 mm

$ 14.36

View Gem
0.21ct Blue Iolite, Emerald Cut, VS

0.21ct Blue Iolite, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 8.37

View Gem
21.59ct Black Nuummite, Oval, Opaque

21.59ct Black Nuummite, Oval, Opaque

24.2 x 16 mm

$ 94.83

View Gem
0.64ct Green Peridot, Marquise, VS

0.64ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 10.20

View Gem
5.79ctw White Moonstone, Round, Transparent

5.79ctw White Moonstone, Round, Transparent

8 mm (calibrated)

$ 15.85

View Gem
5.32ct Purple Kunzite, Oval, VS

5.32ct Purple Kunzite, Oval, VS

11 x 9 mm (calibrated)

$ 146.40

View Gem
3.04ctw Green Prehnite, Oval, Transparent

3.04ctw Green Prehnite, Oval, Transparent

8 x 6 mm (calibrated)

$ 16.65

View Gem
3.45ct Pink Sunstone, Round, Transparent

3.45ct Pink Sunstone, Round, Transparent

9.5 mm (calibrated)

$ 20.11

View Gem
1.59ct Red Almandine Garnet, Baguette, VVS

1.59ct Red Almandine Garnet, Baguette, VVS

9.9 x 5 mm

$ 59.39

View Gem
1.15ctw Red Pyrope Garnet, Heart, VVS-VS

1.15ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 28.64

View Gem
10.53ct Multicolor Amethyst Geode Slice, Fancy, Transparent

10.53ct Multicolor Amethyst Geode Slice, Fancy, Transparent

18.8 x 14 mm

$ 11.22

View Gem
4.93ct Red Cat'S Eye Tourmaline, Oval, Translucent
Cat's Eye Tourmaline Product Video (752658)

4.93ct Red Cat'S Eye Tourmaline, Oval, Translucent

9.4 x 9.1 mm

$ 736.54

View Gem
24.15ct Yellow Rutile Quartz, Pear Shape, Transparent
Rutile Quartz Product Video (403669)

24.15ct Yellow Rutile Quartz, Pear Shape, Transparent

23.9 x 18.6 mm

$ 139.97

View Gem
4.96ct Orange Spessartite Garnet, Oval, Translucent

4.96ct Orange Spessartite Garnet, Oval, Translucent

11.3 x 8.5 mm

$ 105.58

View Gem
0.53ct Red Spinel, Oval, VS

0.53ct Red Spinel, Oval, VS

5.4 x 4.4 mm

$ 43.99

View Gem
3.91ct Yellow Citrine, Oval, VVS-VS

3.91ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 31.14

View Gem
5.64ct Brown Tiger'S Eye, Oval, Opaque

5.64ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 5.62

View Gem
1.20ct Yellow Citrine, Emerald Cut, VVS-VS

1.20ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 7.89

View Gem
11.67ct Multicolor Agate, Fancy, Translucent

11.67ct Multicolor Agate, Fancy, Translucent

17.9 x 8.3 mm

$ 20.43

View Gem
1.09ct Pink Strawberry Quartz, Round, Transparent

1.09ct Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 9.55

View Gem
1.36ct Orange Hessonite Garnet, Square, VS

1.36ct Orange Hessonite Garnet, Square, VS

5.9 x 5.7 mm

$ 22.81

View Gem
1 2 3
...
244
Choose Page
1 - 1876

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

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 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

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image