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
4.12ct Violet Amethyst, Pear Shape, VVS

4.12ct Violet Amethyst, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 29.93

View Gem
62.29ct Multicolor Opal, Oval, Opaque
Opal Product Video (718048)

62.29ct Multicolor Opal, Oval, Opaque

43.8 x 24.6 mm

$ 186.12

View Gem
1.08ctw Green Peridot, Marquise, VVS-VS

1.08ctw Green Peridot, Marquise, VVS-VS

8.1 x 4.1 mm

$ 9.46

View Gem
0.69ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

0.69ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

9.8 x 3.8 mm

$ 24.19

View Gem
13.97ctw Violet Amethyst, Oval, Transparent

13.97ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 76.53

View Gem
3.12ctw Yellow Citrine, Square, VS

3.12ctw Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 20.51

View Gem
3.97ct Violet Amethyst, Pear Shape, VVS

3.97ct Violet Amethyst, Pear Shape, VVS

13.8 x 9.7 mm

$ 28.83

View Gem
0.20ct White Diamond, Round, VVS

0.20ct White Diamond, Round, VVS

3.5 mm (calibrated)

$ 335.79

View Gem
2.87ct Orange Hessonite Garnet, Oval, VS

2.87ct Orange Hessonite Garnet, Oval, VS

9.2 x 7.6 mm

$ 62.89

View Gem
1.01ct Yellow Zircon, Oval, VVS-VS

1.01ct Yellow Zircon, Oval, VVS-VS

5.9 x 4.8 mm

$ 12.57

View Gem
0.66ct Orange Zircon, Oval, VVS-VS

0.66ct Orange Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 9.86

View Gem
0.50ct White Rainbow Moonstone, Baguette, Transparent

0.50ct White Rainbow Moonstone, Baguette, Transparent

6 x 4 mm (calibrated)

$ 17.43

View Gem
33.61ct Green Bloodstone, Oval, Opaque

33.61ct Green Bloodstone, Oval, Opaque

27 x 20 mm (calibrated)

$ 50.22

View Gem
1.10ct Yellow Citrine, Round, VVS

1.10ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 7.30

View Gem
1.62ct Pink Strawberry Quartz, Oval, Translucent

1.62ct Pink Strawberry Quartz, Oval, Translucent

9 x 7 mm (calibrated)

$ 12.42

View Gem
2.54ctw Blue Kyanite, Oval, SI

2.54ctw Blue Kyanite, Oval, SI

8.1 x 6.3 mm

$ 52.88

View Gem
2.21ct Yellow Citrine, Oval, VVS

2.21ct Yellow Citrine, Oval, VVS

10.6 x 7 mm

$ 13.39

View Gem
11.62ctw Multicolor Pietersite, Pear Shape, Opaque

11.62ctw Multicolor Pietersite, Pear Shape, Opaque

18.7 x 10.1 mm

$ 51.30

View Gem
0.44ct Yellow Citrine, Marquise, VVS-VS

0.44ct Yellow Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 3.07

View Gem
2.13ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.13ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 35.57

View Gem
13.17ct Violet Amethyst, Cushion, VVS

13.17ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 104.94

View Gem
7.01ct White Rainbow Moonstone, Pear Shape, Transparent

7.01ct White Rainbow Moonstone, Pear Shape, Transparent

20.7 x 8.9 mm

$ 55.86

View Gem
4.95ct Multicolor Fire Agate, Fancy, Opaque

4.95ct Multicolor Fire Agate, Fancy, Opaque

14.3 x 8.4 mm

$ 69.75

View Gem
8.33ct Yellow Calcite, Pear Shape, Translucent

8.33ct Yellow Calcite, Pear Shape, Translucent

25.1 x 10.7 mm

$ 5.73

View Gem
1 2 3
...
1014
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 -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 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 -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

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