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
0.59ct Orange Zircon, Oval, VVS-VS

0.59ct Orange Zircon, Oval, VVS-VS

5.2 x 4.1 mm

$ 8.81

View Gem
3.20ctw Yellow Citrine, Emerald Cut, VVS-VS

3.20ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 25.50

View Gem
1.10ct Pink Tourmaline, Emerald Cut, VS

1.10ct Pink Tourmaline, Emerald Cut, VS

8.6 x 4.2 mm

$ 75.60

View Gem
1.03ct Purple Sapphire, Pear Shape, VS-SI
Sapphire Product Video (448509)

1.03ct Purple Sapphire, Pear Shape, VS-SI

7.6 x 5.5 mm

$ 543.92

View Gem
1.16ct Multicolor Opal, Oval, Transparent

1.16ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 36.49

View Gem
15.79ct Multicolor Agate, Oval, Opaque

15.79ct Multicolor Agate, Oval, Opaque

16.7 x 14.1 mm

$ 12.58

View Gem
2.78ctw Orange Spessartite Garnet, Round, VS

2.78ctw Orange Spessartite Garnet, Round, VS

5 mm (calibrated)

$ 91.37

View Gem
6.39ctw Green Prehnite, Oval, Transparent/Translucent

6.39ctw Green Prehnite, Oval, Transparent/Translucent

8 x 6 mm (calibrated)

$ 18.91

View Gem
32.35ct Yellow Obsidian, Cushion, Opaque

32.35ct Yellow Obsidian, Cushion, Opaque

29.7 x 17.1 mm

$ 35.45

View Gem
17.53ct Multicolor Jasper, Fancy, Opaque

17.53ct Multicolor Jasper, Fancy, Opaque

40.9 x 8.4 mm

$ 5.24

View Gem
2.12ct Orange Hessonite Garnet, Oval, VS

2.12ct Orange Hessonite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 32.39

View Gem
10.45ct Multicolor Pietersite, Oval, Opaque

10.45ct Multicolor Pietersite, Oval, Opaque

18 x 13 mm (calibrated)

$ 41.63

View Gem
1.28ctw Yellow Citrine, Heart, VVS-VS

1.28ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 8.92

View Gem
36.26ct Multicolor Psilomelane Dendrite, Oval, Opaque

36.26ct Multicolor Psilomelane Dendrite, Oval, Opaque

34.1 x 24.1 mm

$ 29.25

View Gem
6.98ctw Green Prehnite, Oval, Transparent

6.98ctw Green Prehnite, Oval, Transparent

7.7 x 6.6 mm

$ 44.61

View Gem
7.48ctw Violet Amethyst, Oval, Transparent

7.48ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 29.58

View Gem
2.59ct Yellow Citrine, Oval, VS

2.59ct Yellow Citrine, Oval, VS

11 x 8.1 mm

$ 19.86

View Gem
10.22ctw Multicolor Pietersite, Oval, Opaque

10.22ctw Multicolor Pietersite, Oval, Opaque

17.2 x 11.5 mm

$ 23.92

View Gem
3.88ctw Violet Amethyst, Oval, VVS-VS

3.88ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 21.26

View Gem
1.78ct Violet Amethyst, Marquise, VS

1.78ct Violet Amethyst, Marquise, VS

11.7 x 6 mm

$ 12.41

View Gem
2.85ct Yellow Citrine, Oval, VS

2.85ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 19.87

View Gem
3.22ctw Yellow Citrine, Square, VS

3.22ctw Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 21.17

View Gem
30.91ct Brown Tiger'S Eye, Fancy, Opaque

30.91ct Brown Tiger'S Eye, Fancy, Opaque

37.3 x 10.1 mm

$ 3.08

View Gem
2.73ct Brown Smoky Quartz, Marquise, VVS

2.73ct Brown Smoky Quartz, Marquise, VVS

13.1 x 8 mm

$ 10.42

View Gem
1 2 3
...
219
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

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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

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

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

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