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
2.34ct Orange Hessonite Garnet, Emerald Cut, SI

2.34ct Orange Hessonite Garnet, Emerald Cut, SI

8.7 x 6.6 mm

$ 39.87

View Gem
1.75ctw Yellow Citrine, Marquise, VS

1.75ctw Yellow Citrine, Marquise, VS

9 x 5 mm

$ 13.43

View Gem
0.61ct Red Pyrope Garnet, Heart, VS

0.61ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 15.19

View Gem
1.85ct Pink Strawberry Quartz, Oval, Translucent

1.85ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 9.25

View Gem
0.66ct Pink Morganite, Oval, VS-SI

0.66ct Pink Morganite, Oval, VS-SI

7.1 x 4.7 mm

$ 27.39

View Gem
4.50ct Violet Amethyst, Pear Shape, VVS

4.50ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 32.69

View Gem
2.14ct Yellow Rutile Quartz, Pear Shape, Transparent

2.14ct Yellow Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 5.77

View Gem
3.28ct Yellow Citrine, Oval, VS

3.28ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 21.56

View Gem
15.24ct Green Maw-Sit-Sit, Oval, Opaque

15.24ct Green Maw-Sit-Sit, Oval, Opaque

16 x 12 mm (calibrated)

$ 50.09

View Gem
1.75ct Yellow Citrine, Square, VS

1.75ct Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 11.50

View Gem
1.66ct Blue Kyanite, Oval, SI

1.66ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 36.37

View Gem
7.07ct Multicolor Opal, Pear Shape, Translucent

7.07ct Multicolor Opal, Pear Shape, Translucent

19.1 x 13.5 mm

$ 176.04

View Gem
11.23ct Green Druzy Variscite, Fancy, Opaque

11.23ct Green Druzy Variscite, Fancy, Opaque

28 x 18.1 mm

$ 15.65

View Gem
1.93ct Green Sphene, Oval, Transparent

1.93ct Green Sphene, Oval, Transparent

7.7 x 6.3 mm

$ 9.61

View Gem
1.16ct Yellow Chrysoberyl, Oval, VS-SI
Chrysoberyl Product Video (366304)

1.16ct Yellow Chrysoberyl, Oval, VS-SI

7.1 x 6.1 mm

$ 135.27

View Gem
1.55ct Pink Morganite, Round, VVS-VS

1.55ct Pink Morganite, Round, VVS-VS

7 mm (calibrated)

$ 50.17

View Gem
73.16ct Red Star Garnet, Round, Opaque
Star Garnet Product Video (403890)

73.16ct Red Star Garnet, Round, Opaque

23.3 mm

$ 240.47

View Gem
4.38ct Violet Amethyst, Round, VVS-VS

4.38ct Violet Amethyst, Round, VVS-VS

11 mm (calibrated)

$ 28.79

View Gem
2.00ct Green Peridot, Cushion, VS

2.00ct Green Peridot, Cushion, VS

7.4 x 7.2 mm

$ 78.75

View Gem
1.27ct Yellow Citrine, Round, VS

1.27ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 8.43

View Gem
2.09ct Orange Hessonite Garnet, Oval, VS-SI

2.09ct Orange Hessonite Garnet, Oval, VS-SI

8.5 x 7 mm

$ 45.80

View Gem
14.99ct White Rainbow Moonstone, Oval, Transparent

14.99ct White Rainbow Moonstone, Oval, Transparent

19.8 x 12.8 mm

$ 223.95

View Gem
11.86ct Multicolor Coral, Pear Shape, Translucent

11.86ct Multicolor Coral, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 37.03

View Gem
2.80ct Violet Amethyst, Pear Shape, VVS

2.80ct Violet Amethyst, Pear Shape, VVS

13 x 9 mm (calibrated)

$ 19.52

View Gem
1 2 3
...
135
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

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 -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
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

Great selection of gems at a reasonable price

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