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 › Natural Untreated Gemstones

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All
0.70ct Orange Fire Opal, Oval, Transparent

0.70ct Orange Fire Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 13.80

View Gem
0.53ct Yellow Citrine, Marquise, VS

0.53ct Yellow Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.96

View Gem
1.21ct Yellow Chrysoberyl, Pear Shape, VVS-VS
Chrysoberyl Product Video (367464)

1.21ct Yellow Chrysoberyl, Pear Shape, VVS-VS

9.4 x 5.5 mm

$ 140.15

View Gem
23.81ct Multicolor Jasper, Oval, Opaque

23.81ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 13.51

View Gem
3.97ctw Red Pyrope Garnet, Square, VS

3.97ctw Red Pyrope Garnet, Square, VS

3.9 x 3.8 mm

$ 30.44

View Gem
4.03ct Purple Rhodolite Garnet, Heart, VVS-VS

4.03ct Purple Rhodolite Garnet, Heart, VVS-VS

10.6 x 9.6 mm

$ 167.25

View Gem
4.64ct Yellow Citrine, Emerald Cut, VVS-VS

4.64ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 35.59

View Gem
33.41ct Multicolor Jasper, Cushion, Opaque

33.41ct Multicolor Jasper, Cushion, Opaque

27.6 x 23.4 mm

$ 27.46

View Gem
0.92ct Green Tourmaline, Baguette, VS

0.92ct Green Tourmaline, Baguette, VS

11.6 x 3.3 mm

$ 32.07

View Gem
0.94ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.94ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7.6 x 5.1 mm

$ 49.19

View Gem
0.59ct Orange Zircon, Oval, VVS-VS

0.59ct Orange Zircon, Oval, VVS-VS

5.2 x 4 mm

$ 14.69

View Gem
1.54ct Purple Spinel, Cushion, VVS-VS
Spinel Product Video (754863)

1.54ct Purple Spinel, Cushion, VVS-VS

7.7 x 6.4 mm

$ 153.38

View Gem
1.98ct Red Almandine Garnet, Baguette, VVS-VS

1.98ct Red Almandine Garnet, Baguette, VVS-VS

10 x 5.1 mm

$ 16.43

View Gem
1.05ct Blue Kyanite, Oval, VS-SI

1.05ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 23.01

View Gem
1.43ct Brown Sillimanite Cat'S Eye, Oval, Transparent

1.43ct Brown Sillimanite Cat'S Eye, Oval, Transparent

7 x 4.4 mm

$ 4.27

View Gem
12.87ct Green Druzy Variscite, Fancy, Opaque

12.87ct Green Druzy Variscite, Fancy, Opaque

27 x 20 mm (calibrated)

$ 54.61

View Gem
59.96ct Multicolor Jasper, Oval, Opaque

59.96ct Multicolor Jasper, Oval, Opaque

35.2 x 23.4 mm

$ 51.24

View Gem
8.06ctw Pink Strawberry Quartz, Oval, Transparent

8.06ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 123.62

View Gem
35.86ctw Multicolor Rhodochrosite, Oval, Translucent

35.86ctw Multicolor Rhodochrosite, Oval, Translucent

24.7 x 14.8 mm

$ 35.71

View Gem
3.73ct Yellow Zircon, Oval, VS
Zircon Product Video (745616)

3.73ct Yellow Zircon, Oval, VS

9 x 7 mm (calibrated)

$ 216.71

View Gem
2.27ct Yellow Citrine, Cushion, VS

2.27ct Yellow Citrine, Cushion, VS

9.6 x 7 mm

$ 17.41

View Gem
8.67ctw Green Amazonite, Cushion, Opaque

8.67ctw Green Amazonite, Cushion, Opaque

7.3 x 7.3 mm

$ 21.10

View Gem
5.21ct Brown Smoky Quartz, Round, Transparent

5.21ct Brown Smoky Quartz, Round, Transparent

12 mm (calibrated)

$ 21.86

View Gem
0.76ct Yellow Citrine, Trillion, VVS-VS

0.76ct Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 6.31

View Gem
1 2 3
...
299
Choose Page
1 - 1882

Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was great

Posted By Nik in June, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
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

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image