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?

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
18.45ct Pink Kunzite, Marquise, Translucent

18.45ct Pink Kunzite, Marquise, Translucent

24.6 x 11.1 mm

$ 60.65

View Gem
10.30ct Brown Moonstone, Fancy, Translucent

10.30ct Brown Moonstone, Fancy, Translucent

20.1 x 11.1 mm

$ 9.88

View Gem
7.26ct Violet Amethyst, Pear Shape, VS

7.26ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 55.68

View Gem
1.70ct Yellow Citrine, Round, VVS-VS

1.70ct Yellow Citrine, Round, VVS-VS

7.5 mm (calibrated)

$ 11.29

View Gem
39.37ct Black Nuummite, Oval, Opaque

39.37ct Black Nuummite, Oval, Opaque

25.7 x 21.8 mm

$ 164.77

View Gem
3.45ctw Multicolor Andalusite, Round, VS

3.45ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 151.69

View Gem
2.30ct Yellow Citrine, Oval, VS

2.30ct Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 12.60

View Gem
1.30ct Pink Strawberry Quartz, Oval, Translucent

1.30ct Pink Strawberry Quartz, Oval, Translucent

7 x 5 mm (calibrated)

$ 6.49

View Gem
3.88ct Pink Morganite, Round, Transparent

3.88ct Pink Morganite, Round, Transparent

10 mm (calibrated)

$ 42.08

View Gem
8.91ct Green Uvarovite Garnet Drusy, Fancy, Opaque

8.91ct Green Uvarovite Garnet Drusy, Fancy, Opaque

15 x 12.7 mm

$ 28.99

View Gem
0.61ct Orange Zircon, Oval, VVS

0.61ct Orange Zircon, Oval, VVS

5.2 x 4 mm

$ 15.19

View Gem
2.49ctw Violet Amethyst, Oval, VVS-VS

2.49ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.65

View Gem
5.93ct Brown Rutile Quartz, Round, Transparent

5.93ct Brown Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 14.88

View Gem
0.20ctw White Diamond, Round, VVS-VS
Diamond Product Video (565154)

0.20ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 302.81

View Gem
3.78ct Yellow Apatite, Pear Shape, VS-SI

3.78ct Yellow Apatite, Pear Shape, VS-SI

12.4 x 9.1 mm

$ 202.23

View Gem
2.15ctw Orange Sunstone, Oval, Translucent

2.15ctw Orange Sunstone, Oval, Translucent

8.3 x 6.4 mm

$ 14.99

View Gem
3.28ctw Red Pyrope Garnet, Square, VS

3.28ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 25.16

View Gem
2.34ct Multicolor Labradorite, Marquise, Translucent

2.34ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.17

View Gem
9.15ct Green Malachite, Baguette, Opaque

9.15ct Green Malachite, Baguette, Opaque

11.7 x 10.7 mm

$ 12.04

View Gem
0.34ct Blue Kyanite, Round, VS-SI

0.34ct Blue Kyanite, Round, VS-SI

4 mm (calibrated)

$ 8.47

View Gem
0.59ct Yellow Citrine, Marquise, VVS-VS

0.59ct Yellow Citrine, Marquise, VVS-VS

8.3 x 4.3 mm

$ 3.53

View Gem
1.35ct Green Peridot, Oval, VS

1.35ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 14.79

View Gem
1.89ct Orange Hessonite Garnet, Oval, VS

1.89ct Orange Hessonite Garnet, Oval, VS

8.4 x 6.7 mm

$ 29.53

View Gem
5.16ctw Red Pyrope Garnet, Pear Shape, VS

5.16ctw Red Pyrope Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 39.57

View Gem
1 2 3
...
554
Choose Page
1 - 1895

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

Very food

Posted By Keeto in July, 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

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image