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
25.97ct White Rainbow Moonstone, Oval, Translucent
Rainbow Moonstone Product Video (674102)

25.97ct White Rainbow Moonstone, Oval, Translucent

24.1 x 17.2 mm

$ 323.33

View Gem
2.33ctw Pink Morganite, Oval, VVS-VS

2.33ctw Pink Morganite, Oval, VVS-VS

6 x 6 mm (calibrated)

$ 127.64

View Gem
14.93ctw Brown Tiger'S Eye, Baguette, Opaque

14.93ctw Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 16.35

View Gem
11.46ct Yellow Apatite, Oval, VS
Apatite Product Video (614758)

11.46ct Yellow Apatite, Oval, VS

16 x 12 mm (calibrated)

$ 520.69

View Gem
4.17ct White Morganite, Oval, Transparent

4.17ct White Morganite, Oval, Transparent

14.3 x 10.4 mm

$ 47.92

View Gem
8.28ct Blue Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439473)

8.28ct Blue Hemimorphite Druzy, Fancy, Opaque

13 x 13 mm (calibrated)

$ 123.70

View Gem
39.03ct Multicolor Jasper, Pear Shape, Opaque

39.03ct Multicolor Jasper, Pear Shape, Opaque

33.5 x 33.2 mm

$ 64.13

View Gem
8.98ct Yellow Star Moonstone, Oval, Opaque

8.98ct Yellow Star Moonstone, Oval, Opaque

13 x 11 mm (calibrated)

$ 39.35

View Gem
2.37ctw Multicolor Andalusite, Round, VS-SI

2.37ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 116.85

View Gem
1.17ct Purple Spinel, Pear Shape, VS-SI

1.17ct Purple Spinel, Pear Shape, VS-SI

7.5 x 5.9 mm

$ 134.60

View Gem
21.16ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (678766)

21.16ct Multicolor Boulder Opal, Fancy, Opaque

25.6 x 16.9 mm

$ 105.38

View Gem
29.23ctw Multicolor Fossil Coral, Fancy, Opaque
Fossil Coral Product Video (514331)

29.23ctw Multicolor Fossil Coral, Fancy, Opaque

21.7 x 14.7 mm

$ 63.41

View Gem
108.15ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (522443)

108.15ct Pink Rose Quartz, Oval, Transparent

37.9 x 26.2 mm

$ 236.98

View Gem
13.71ct Yellow Apatite, Cushion, VS
Apatite Product Video (407302)

13.71ct Yellow Apatite, Cushion, VS

14.9 x 14 mm

$ 566.28

View Gem
30.47ct Brown Moonstone, Fancy, Opaque

30.47ct Brown Moonstone, Fancy, Opaque

25 x 18 mm (calibrated)

$ 35.05

View Gem
7.57ct Pink Strawberry Quartz, Oval, Translucent

7.57ct Pink Strawberry Quartz, Oval, Translucent

12.9 x 10.1 mm

$ 45.62

View Gem
1.42ct White Sillimanite Cat'S Eye, Oval, Transparent

1.42ct White Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 6.4 mm

$ 5.66

View Gem
14.38ct White Howlite, Pear Shape, Opaque

14.38ct White Howlite, Pear Shape, Opaque

23.2 x 16.4 mm

$ 6.73

View Gem
57.73ct Multicolor Jasper, Oval, Opaque
Jasper Product Video (623881)

57.73ct Multicolor Jasper, Oval, Opaque

39.3 x 27.4 mm

$ 58.82

View Gem
3.81ct Multicolor Fire Agate, Fancy, Opaque

3.81ct Multicolor Fire Agate, Fancy, Opaque

11.6 x 9.1 mm

$ 53.68

View Gem
13.54ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450374)

13.54ct Blue Aquamarine, Emerald Cut, VVS

19.3 x 9.7 mm

$ 3,708.61

View Gem
1.58ct Purple Spinel, Marquise, VS
Spinel Product Video (369307)

1.58ct Purple Spinel, Marquise, VS

10.6 x 5.8 mm

$ 93.57

View Gem
0.90ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.90ct Yellow Color-Change Diaspore, Emerald Cut, VS

8.7 x 4.1 mm

$ 39.59

View Gem
2.55ct Orange Hessonite Garnet, Emerald Cut, SI

2.55ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 35.06

View Gem
1 2 3
...
38
Choose Page
1 - 1897

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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

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