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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
Faceted
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19.31ct Multicolor Rainbow Pyrite, Fancy, Opaque

19.31ct Multicolor Rainbow Pyrite, Fancy, Opaque

17.9 x 13.7 mm

$ 50.01

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15.88ct Multicolor Boulder Opal, Cushion, Opaque

15.88ct Multicolor Boulder Opal, Cushion, Opaque

23.1 x 12.2 mm

$ 110.71

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26.46ct Blue Chalcedony, Pear Shape, Opaque
Chalcedony Product Video (694293)

26.46ct Blue Chalcedony, Pear Shape, Opaque

33.4 x 17.6 mm

$ 65.89

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46.72ctw White Howlite, Sphere / Ball, Opaque

46.72ctw White Howlite, Sphere / Ball, Opaque

15 mm (calibrated)

$ 24.19

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45.87ct Green Serpentine, Oval, Translucent

45.87ct Green Serpentine, Oval, Translucent

31.9 x 22 mm

$ 98.22

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0.55ct Yellow Sphalerite, Fancy, SI

0.55ct Yellow Sphalerite, Fancy, SI

6.1 x 4.2 mm

$ 27.39

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52.73ct Multicolor Jasper, Square, Opaque

52.73ct Multicolor Jasper, Square, Opaque

24 x 23.3 mm

$ 57.77

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5.48ct Orange Spessartite Garnet, Oval, Translucent
Spessartite Garnet Product Video (424330)

5.48ct Orange Spessartite Garnet, Oval, Translucent

11 x 9 mm (calibrated)

$ 142.13

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0.53ct Green Demantoid Garnet, Oval, VS

0.53ct Green Demantoid Garnet, Oval, VS

6 x 4 mm (calibrated)

$ 145.17

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6.48ct Green Idocrase, Pear Shape, VS
Idocrase Product Video (502119)

6.48ct Green Idocrase, Pear Shape, VS

12.9 x 9.9 mm

$ 606.12

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1.71ct Yellow Sillimanite Cat'S Eye, Oval, Transparent

1.71ct Yellow Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5.3 mm

$ 5.62

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6.29ct Orange Imperial Topaz, Cushion, VVS
Imperial Topaz Product Video (384489)

6.29ct Orange Imperial Topaz, Cushion, VVS

13.7 x 8.3 mm

$ 2,923.59

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15.01ct Black Nuummite, Oval, Opaque

15.01ct Black Nuummite, Oval, Opaque

19.7 x 11.5 mm

$ 65.93

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3.10ct Brown Cat'S Eye Scapolite, Round, Translucent

3.10ct Brown Cat'S Eye Scapolite, Round, Translucent

9 mm (calibrated)

$ 16.98

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3.64ct Yellow Prehnite, Oval, Transparent/Translucent

3.64ct Yellow Prehnite, Oval, Transparent/Translucent

10 x 8 mm (calibrated)

$ 28.45

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2.65ct Yellow Sphene, Oval, VS-SI
Sphene Product Video (526855)

2.65ct Yellow Sphene, Oval, VS-SI

8.8 x 7.7 mm

$ 159.69

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4.57ct Yellow Cat'S Eye Opal, Oval, Opaque

4.57ct Yellow Cat'S Eye Opal, Oval, Opaque

12.2 x 9 mm

$ 25.04

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0.67ct Green Peridot, Square, VVS-VS
Peridot Product Video (527303)

0.67ct Green Peridot, Square, VVS-VS

5 x 5 mm (calibrated)

$ 9.20

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25.91ct Violet Amethyst, Round, VVS
Amethyst Product Video (692710)

25.91ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 150.54

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0.99ct Green Tsavorite Garnet, Oval, VS-SI
Tsavorite Garnet Product Video (415864)

0.99ct Green Tsavorite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 542.32

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38.39ctw Green Seraphinite, Sphere / Ball, Opaque
Seraphinite Product Video (447351)

38.39ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 57.35

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10.12ct Purple Kunzite, Oval, VS
Kunzite Product Video (409936)

10.12ct Purple Kunzite, Oval, VS

17.7 x 10.1 mm

$ 286.61

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3.50ctw Orange Hessonite Garnet, Square, VS

3.50ctw Orange Hessonite Garnet, Square, VS

6.7 x 6.6 mm

$ 76.69

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99.30ctw White Quartz, Pear Shape, Transparent
Quartz Product Video (501696)

99.30ctw White Quartz, Pear Shape, Transparent

64.7 x 20.1 mm

$ 326.38

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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

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I've made several purchases over the last 8 years and I've never been less than happy with any of them.

Posted By Jess in July, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was great! Great photos

Posted By Marcia in June, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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