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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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7.99ct Bi-Color Tourmaline, Emerald Cut, SI
Tourmaline Product Video (696778)

7.99ct Bi-Color Tourmaline, Emerald Cut, SI

18.2 x 7.7 mm

$ 530.54

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13.57ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

13.57ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

23.2 x 15.4 mm

$ 35.14

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8.25ct Brown Rutile Quartz, Round, Transparent

8.25ct Brown Rutile Quartz, Round, Transparent

14 mm (calibrated)

$ 20.70

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5.67ct Brown Rutile Quartz, Round, Translucent

5.67ct Brown Rutile Quartz, Round, Translucent

11 mm (calibrated)

$ 14.23

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9.42ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

9.42ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

16.4 x 12.8 mm

$ 60.27

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14.24ct Black Tourmaline, Pear Shape, Opaque

14.24ct Black Tourmaline, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 59.10

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8.98ct Yellow Star Moonstone, Oval, Opaque

8.98ct Yellow Star Moonstone, Oval, Opaque

13 x 11 mm (calibrated)

$ 39.35

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57.58ct Multicolor Jasper, Oval, Opaque

57.58ct Multicolor Jasper, Oval, Opaque

44.5 x 28.7 mm

$ 48.57

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58.83ct Multicolor Jasper, Oval, Opaque

58.83ct Multicolor Jasper, Oval, Opaque

41.4 x 25.9 mm

$ 64.45

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1.50ct Orange Hessonite Garnet, Cushion, VS

1.50ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 53.88

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0.60ct Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (278683)

0.60ct Green Demantoid Garnet, Oval, VS

6 x 4.2 mm

$ 164.34

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0.81ct Green Sphene, Oval, VS-SI

0.81ct Green Sphene, Oval, VS-SI

6.6 x 4.9 mm

$ 48.81

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3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque
Lapis Lazuli Product Video (337538)

3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque

72.4 mm

$ 1,774.87

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5.10ct Yellow Apatite, Baguette, VS
Apatite Product Video (407938)

5.10ct Yellow Apatite, Baguette, VS

14.7 x 8.3 mm

$ 232.16

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2.31ct Multicolor Spectrolite, Round, Opaque

2.31ct Multicolor Spectrolite, Round, Opaque

10 mm (calibrated)

$ 9.07

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9.33ct Brown Moonstone, Flower Cut, Translucent

9.33ct Brown Moonstone, Flower Cut, Translucent

15.7 x 15.3 mm

$ 40.89

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26.73ct Multicolor Pietersite, Oval, Opaque

26.73ct Multicolor Pietersite, Oval, Opaque

27 x 20 mm (calibrated)

$ 68.23

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24.26ctw Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (602229)

24.26ctw Multicolor Pietersite, Oval, Opaque

25.6 x 16.1 mm

$ 89.27

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14.98ct Multicolor Boulder Opal, Cushion, Opaque

14.98ct Multicolor Boulder Opal, Cushion, Opaque

20.2 x 13.9 mm

$ 87.03

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20.07ct Multicolor Jasper, Oval, Opaque

20.07ct Multicolor Jasper, Oval, Opaque

29.2 x 18.5 mm

$ 32.98

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58.74ct Multicolor Jasper, Cushion, Opaque

58.74ct Multicolor Jasper, Cushion, Opaque

31.5 x 25 mm

$ 53.63

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41.53ct Brown Moonstone, Oval, Opaque
Moonstone Product Video (401031)

41.53ct Brown Moonstone, Oval, Opaque

21.4 x 17.8 mm

$ 68.26

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8.99ctw Pink Strawberry Quartz, Oval, Transparent

8.99ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 137.90

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6.58ct Brown Smoky Quartz, Oval, VVS

6.58ct Brown Smoky Quartz, Oval, VVS

14 x 12 mm (calibrated)

$ 26.96

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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!

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My experience was done with ease

Posted By Barb in October, 2025
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Easy process.

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Excellent options

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So far So good

Posted By VH-1 in July, 2025
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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
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Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate
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