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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
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Lots
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29.74ct Brown Moonstone, Oval, Opaque

29.74ct Brown Moonstone, Oval, Opaque

22 x 16.3 mm

$ 65.17

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25.47ctw Multicolor Pietersite, Pear Shape, Opaque
Pietersite Product Video (601393)

25.47ctw Multicolor Pietersite, Pear Shape, Opaque

32.9 x 14.6 mm

$ 112.45

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4.94ct Yellow Apatite, Baguette, VS
Apatite Product Video (438947)

4.94ct Yellow Apatite, Baguette, VS

12.5 x 7.4 mm

$ 254.38

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2.83ct Pink Tourmaline, Emerald Cut, SI

2.83ct Pink Tourmaline, Emerald Cut, SI

8.9 x 6.3 mm

$ 178.28

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2.89ct Yellow Apatite, Oval, VS

2.89ct Yellow Apatite, Oval, VS

9.6 x 8.3 mm

$ 79.17

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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

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1.07ct Yellow Chrysoberyl, Oval, VVS-VS
Chrysoberyl Product Video (366376)

1.07ct Yellow Chrysoberyl, Oval, VVS-VS

7.4 x 5.5 mm

$ 124.77

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6.17ct Yellow Citrine, Oval, VVS-VS

6.17ct Yellow Citrine, Oval, VVS-VS

13 x 11 mm (calibrated)

$ 39.43

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20.92ct Multicolor Quartz With Hedenbergite, Oval, Transparent
Quartz With Hedenbergite Product Video (604641)

20.92ct Multicolor Quartz With Hedenbergite, Oval, Transparent

22.1 x 16 mm

$ 85.95

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2.34ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.34ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8.3 x 6.7 mm

$ 43.44

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0.49ct Orange Sphalerite, Round, SI-I1

0.49ct Orange Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 24.40

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16.81ct Multicolor Quartz With Marcasite, Fancy, Transparent

16.81ct Multicolor Quartz With Marcasite, Fancy, Transparent

23.4 x 14 mm

$ 110.51

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127.45ct Purple Star Ruby, Oval, Opaque
Star Ruby Product Video (513650)

127.45ct Purple Star Ruby, Oval, Opaque

28.6 x 26.2 mm

$ 1,745.43

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9.88ct Multicolor Ruby-Zoisite, Baguette, Opaque

9.88ct Multicolor Ruby-Zoisite, Baguette, Opaque

18.1 x 10 mm

$ 24.01

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19.24ctw Green Aventurine, Fancy, Translucent

19.24ctw Green Aventurine, Fancy, Translucent

21.2 x 10.2 mm

$ 42.16

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11.75ct Pink Rose Quartz, Emerald Cut, Transparent

11.75ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 64.37

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3000.00ct Green Malachite, Oval, Opaque
Malachite Product Video (377422)

3000.00ct Green Malachite, Oval, Opaque

139.4 x 82.7 mm

$ 1,220.10

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17.43ct Brown Smoky Quartz, Round, VVS
Smoky Quartz Product Video (503802)

17.43ct Brown Smoky Quartz, Round, VVS

18 mm (calibrated)

$ 57.29

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28.68ct Orange Moonstone, Round, Translucent
Moonstone Product Video (660339)

28.68ct Orange Moonstone, Round, Translucent

19 mm (calibrated)

$ 47.85

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14.98ct Turquoise Grandidierite, Oval, SI-I1
Grandidierite Product Video (568868)

14.98ct Turquoise Grandidierite, Oval, SI-I1

17.5 x 14.6 mm

$ 672.90

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2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 7 mm (calibrated)

$ 42.40

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31.21ct Multicolor Peanut Wood, Cushion, Opaque

31.21ct Multicolor Peanut Wood, Cushion, Opaque

37.2 x 17 mm

$ 18.66

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27.02ct Yellow Quartz With Marcasite, Trillion, Transparent

27.02ct Yellow Quartz With Marcasite, Trillion, Transparent

26.7 x 23.1 mm

$ 148.01

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0.90ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458684)

0.90ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 162.21

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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

Ia've been searching for a source to get my gemstones for awhile now and was very happy to come across this website. Amazing variety for any income.

Posted By Tarah in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
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Overall Rating -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
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Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate
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