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
83.06ct Pink Rose Quartz, Pear Shape, Transparent

83.06ct Pink Rose Quartz, Pear Shape, Transparent

32.6 x 24.9 mm

$ 182.00

View Gem
12.91ct Brown Smoky Quartz, Emerald Cut, VVS

12.91ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 29.47

View Gem
9.49ct Pink Kunzite, Pear Shape, VS
Kunzite Product Video (441222)

9.49ct Pink Kunzite, Pear Shape, VS

17.3 x 8.8 mm

$ 259.94

View Gem
19.85ct Multicolor Pietersite, Oval, Opaque

19.85ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 86.99

View Gem
13.13ct Bi-Color Tourmaline, Emerald Cut, SI
Tourmaline Product Video (402789)

13.13ct Bi-Color Tourmaline, Emerald Cut, SI

12.3 x 11.5 mm

$ 1,750.89

View Gem
1.33ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458407)

1.33ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.5 mm

$ 121.43

View Gem
1.46ct Purple Spinel, Cushion, VS

1.46ct Purple Spinel, Cushion, VS

6.8 x 6.4 mm

$ 107.50

View Gem
8.20ct Yellow Apatite, Oval, VS-SI
Apatite Product Video (407296)

8.20ct Yellow Apatite, Oval, VS-SI

15.2 x 11.5 mm

$ 372.56

View Gem
7.18ct Pink Morganite, Oval, Transparent

7.18ct Pink Morganite, Oval, Transparent

11.9 x 10.8 mm

$ 78.67

View Gem
4.37ctw Multicolor Spectrolite, Oval, Opaque

4.37ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 16.65

View Gem
2.53ct Yellow Golden Beryl, Oval, VVS

2.53ct Yellow Golden Beryl, Oval, VVS

10 x 8 mm (calibrated)

$ 69.31

View Gem
6.12ct Yellow Rutile Quartz, Round, Transparent

6.12ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 26.83

View Gem
6.37ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (407845)

6.37ct Yellow Apatite, Emerald Cut, VS

13.3 x 9.8 mm

$ 289.98

View Gem
25.93ctw White Rainbow Moonstone, Oval, Transparent
Rainbow Moonstone Product Video (669278)

25.93ctw White Rainbow Moonstone, Oval, Transparent

21.8 x 10.4 mm

$ 464.87

View Gem
1.19ct Pink Malaya Garnet, Round, VS

1.19ct Pink Malaya Garnet, Round, VS

6 mm (calibrated)

$ 55.42

View Gem
1.13ct Purple Spinel, Cushion, VS

1.13ct Purple Spinel, Cushion, VS

6.5 x 5.5 mm

$ 67.01

View Gem
27.28ctw Multicolor Fossil Coral, Cushion, Opaque
Fossil Coral Product Video (514176)

27.28ctw Multicolor Fossil Coral, Cushion, Opaque

17 x 12.9 mm

$ 49.31

View Gem
2.03ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (461509)

2.03ctw Green Demantoid Garnet, Oval, VS

4.8 x 4.1 mm

$ 185.34

View Gem
48.61ct White Scolecite, Oval, Opaque
Scolecite Product Video (481303)

48.61ct White Scolecite, Oval, Opaque

40 x 22.9 mm

$ 57.52

View Gem
14.53ct Pink Rose Quartz, Emerald Cut, Transparent

14.53ct Pink Rose Quartz, Emerald Cut, Transparent

15 x 15 mm (calibrated)

$ 79.60

View Gem
7.58ct Brown Apatite, Cushion, VS
Apatite Product Video (387572)

7.58ct Brown Apatite, Cushion, VS

12 x 12 mm (calibrated)

$ 405.51

View Gem
13.86ct Yellow Rutile Quartz, Pear Shape, Transparent

13.86ct Yellow Rutile Quartz, Pear Shape, Transparent

21.7 x 15.2 mm

$ 48.75

View Gem
2.71ct Green Tourmaline, Emerald Cut, VVS-VS

2.71ct Green Tourmaline, Emerald Cut, VVS-VS

15.7 x 5 mm

$ 74.53

View Gem
1.71ct Pink Malaya Garnet, Marquise, VS-SI

1.71ct Pink Malaya Garnet, Marquise, VS-SI

10.8 x 5.4 mm

$ 59.61

View Gem
1 2 3
...
13
Choose Page
1 - 1883

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

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

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