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
2.76ct Yellow Golden Beryl, Oval, VVS-VS

2.76ct Yellow Golden Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 75.60

View Gem
13.66ct Purple Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (693497)

13.66ct Purple Kunzite, Pear Shape, VVS-VS

16.9 x 10.2 mm

$ 375.92

View Gem
12.47ct Multicolor Rainbow Pyrite, Oval, Opaque

12.47ct Multicolor Rainbow Pyrite, Oval, Opaque

22.2 x 12.4 mm

$ 32.17

View Gem
11.78ctw Multicolor Tourmaline, Fancy, Transparent
Tourmaline Product Video (690541)

11.78ctw Multicolor Tourmaline, Fancy, Transparent

20.1 x 9.5 mm

$ 229.61

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
1.04ct Yellow Sphalerite, Oval, SI-I1

1.04ct Yellow Sphalerite, Oval, SI-I1

7 x 5 mm (calibrated)

$ 51.79

View Gem
0.47ct Green Demantoid Garnet, Oval, VVS-VS
Demantoid Garnet Product Video (276496)

0.47ct Green Demantoid Garnet, Oval, VVS-VS

5.7 x 3.8 mm

$ 128.73

View Gem
55.63ct Green Serpentine, Oval, Translucent

55.63ct Green Serpentine, Oval, Translucent

33.6 x 23 mm

$ 99.27

View Gem
23.10ct Pink Kunzite, Emerald Cut, VS
Kunzite Product Video (693806)

23.10ct Pink Kunzite, Emerald Cut, VS

22.5 x 10.8 mm

$ 635.70

View Gem
7.22ct Brown Smoky Quartz, Marquise, VS
Smoky Quartz Product Video (601420)

7.22ct Brown Smoky Quartz, Marquise, VS

17.1 x 12 mm

$ 29.12

View Gem
56.79ct Multicolor Rainbow Pyrite, Fancy, Opaque
Rainbow Pyrite Product Video (645836)

56.79ct Multicolor Rainbow Pyrite, Fancy, Opaque

34.8 x 17.6 mm

$ 147.06

View Gem
2.00ct Turquoise Grandidierite, Round, Translucent
Grandidierite Product Video (603162)

2.00ct Turquoise Grandidierite, Round, Translucent

8 mm (calibrated)

$ 453.58

View Gem
18.83ct Blue Color-Change Fluorite, Oval, VS
Color-Change Fluorite Product Video (445414)

18.83ct Blue Color-Change Fluorite, Oval, VS

20 x 15 mm (calibrated)

$ 431.18

View Gem
1.63ct Pink Morganite, Round, VS

1.63ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 125.01

View Gem
87.88ctw Gray Hematite, Cushion, Opaque

87.88ctw Gray Hematite, Cushion, Opaque

23.4 x 19.5 mm

$ 85.69

View Gem
45.06ct Black Nuummite, Oval, Opaque

45.06ct Black Nuummite, Oval, Opaque

30 x 19.4 mm

$ 188.58

View Gem
3.24ct Orange Spessartite Garnet, Oval, Transparent

3.24ct Orange Spessartite Garnet, Oval, Transparent

9.6 x 7.7 mm

$ 67.23

View Gem
9.27ct Pink Morganite, Trillion, Translucent

9.27ct Pink Morganite, Trillion, Translucent

14 x 14 mm (calibrated)

$ 101.56

View Gem
13.86ct Yellow Apatite, Oval, VS
Apatite Product Video (398363)

13.86ct Yellow Apatite, Oval, VS

16.3 x 14.3 mm

$ 722.95

View Gem
0.57ct Yellow Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (278684)

0.57ct Yellow Demantoid Garnet, Oval, VS

5.7 x 3.9 mm

$ 130.10

View Gem
1.74ctw Yellow Morganite, Pear Shape, VS
Morganite Product Video (571873)

1.74ctw Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 114.38

View Gem
33.71ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (523722)

33.71ct Multicolor Boulder Opal, Fancy, Opaque

32.6 x 22.1 mm

$ 184.67

View Gem
4.74ct Pink Tourmaline, Emerald Cut, SI
Tourmaline Product Video (558338)

4.74ct Pink Tourmaline, Emerald Cut, SI

12 x 8 mm (calibrated)

$ 248.15

View Gem
31.34ct Brown Moonstone, Oval, Opaque

31.34ct Brown Moonstone, Oval, Opaque

20.2 x 16.2 mm

$ 57.23

View Gem
1 2 3
...
18
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

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have made many purchases from GemSelect over the years, and I have a beautiful collection of jewelry as a result. My purchases have always been exactly as described, and I have enjoyed doing business with you.

Posted By MMM in July, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image