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
57.02ct Multicolor Amethyst Geode Slice, Fancy, Transparent
Amethyst Geode Slice Product Video (684869)

57.02ct Multicolor Amethyst Geode Slice, Fancy, Transparent

34.5 x 27.6 mm

$ 60.76

View Gem
35.80ct Multicolor Jasper, Fancy, Opaque

35.80ct Multicolor Jasper, Fancy, Opaque

34.1 x 26.3 mm

$ 39.23

View Gem
2.12ct Orange Coral, Oval, Opaque
Coral Product Video (499173)

2.12ct Orange Coral, Oval, Opaque

10.9 x 5.4 mm

$ 348.40

View Gem
2.29ct Black Cat'S Eye Scapolite, Round, Translucent

2.29ct Black Cat'S Eye Scapolite, Round, Translucent

8 mm (calibrated)

$ 12.55

View Gem
8.43ct Multicolor Fire Agate, Fancy, Opaque

8.43ct Multicolor Fire Agate, Fancy, Opaque

18.4 x 10.3 mm

$ 71.57

View Gem
20.38ct Black Obsidian, Pear Shape, Opaque

20.38ct Black Obsidian, Pear Shape, Opaque

29.6 x 19.6 mm

$ 12.69

View Gem
3.90ct Pink Tourmaline, Emerald Cut, VS-SI

3.90ct Pink Tourmaline, Emerald Cut, VS-SI

11.6 x 5.8 mm

$ 160.23

View Gem
1.01ct Orange Hessonite Garnet, Pear Shape, VS-SI

1.01ct Orange Hessonite Garnet, Pear Shape, VS-SI

8 x 5.5 mm

$ 18.44

View Gem
56.33ct Multicolor Rhodochrosite, Pear Shape, Translucent
Rhodochrosite Product Video (548707)

56.33ct Multicolor Rhodochrosite, Pear Shape, Translucent

37.5 x 23.3 mm

$ 74.06

View Gem
5.38ctw Orange Hessonite Garnet, Cushion, VS-SI

5.38ctw Orange Hessonite Garnet, Cushion, VS-SI

9 x 7 mm (calibrated)

$ 89.31

View Gem
17.82ct Pink Kunzite, Oval, VVS-VS
Kunzite Product Video (693510)

17.82ct Pink Kunzite, Oval, VVS-VS

17 x 15.4 mm

$ 490.40

View Gem
1.08ct Purple Spinel, Pear Shape, VS

1.08ct Purple Spinel, Pear Shape, VS

8.2 x 5.5 mm

$ 100.90

View Gem
3.03ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (396085)

3.03ct Yellow Apatite, Emerald Cut, VS

7.7 x 7.6 mm

$ 123.32

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
64.36ctw Multicolor Labradorite, Round, Translucent
Labradorite Product Video (712049)

64.36ctw Multicolor Labradorite, Round, Translucent

25.4 mm

$ 118.59

View Gem
1.67ct Green Tourmaline, Fancy, VVS
Tourmaline Product Video (715332)

1.67ct Green Tourmaline, Fancy, VVS

7.8 x 5.7 mm

$ 199.60

View Gem
7.49ct Yellow Rutile Quartz, Round, Transparent

7.49ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 32.83

View Gem
2.86ctw Blue Kyanite, Oval, VS-SI

2.86ctw Blue Kyanite, Oval, VS-SI

8 x 6 mm (calibrated)

$ 62.67

View Gem
8.87ctw Black Cat'S Eye Scapolite, Oval, Translucent
Cat's Eye Scapolite Product Video (484137)

8.87ctw Black Cat'S Eye Scapolite, Oval, Translucent

9.1 x 8.6 mm

$ 48.60

View Gem
37.60ct Multicolor Spectrolite, Cushion, Opaque
Spectrolite Product Video (513071)

37.60ct Multicolor Spectrolite, Cushion, Opaque

45 x 24 mm

$ 134.71

View Gem
6.54ct Green Apatite, Emerald Cut, VS
Apatite Product Video (399659)

6.54ct Green Apatite, Emerald Cut, VS

11 x 11 mm (calibrated)

$ 343.22

View Gem
44.10ct Multicolor Quartz With Marcasite, Fancy, Transparent
Quartz With Marcasite Product Video (586699)

44.10ct Multicolor Quartz With Marcasite, Fancy, Transparent

35.1 x 23.7 mm

$ 241.58

View Gem
0.58ct Pink Spinel, Oval, VS
Spinel Product Video (714548)

0.58ct Pink Spinel, Oval, VS

5.3 x 4.2 mm

$ 1,155.36

View Gem
11.29ctw Pink Morganite, Oval, Translucent

11.29ctw Pink Morganite, Oval, Translucent

15 x 9.1 mm

$ 123.69

View Gem
1 2 3
...
12
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 -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

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