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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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12.71ct Multicolor Fire Agate, Fancy, Opaque
Fire Agate Product Video (584124)

12.71ct Multicolor Fire Agate, Fancy, Opaque

23.3 x 10.6 mm

$ 83.08

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2.37ctw Multicolor Andalusite, Round, VS-SI

2.37ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 116.85

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33.78ct Multicolor Pietersite, Oval, Opaque

33.78ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 111.02

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21.24ctw Multicolor Fossil Coral, Pear Shape, Opaque

21.24ctw Multicolor Fossil Coral, Pear Shape, Opaque

20.2 x 11 mm

$ 46.08

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56.08ct Multicolor Jasper, Pear Shape, Opaque

56.08ct Multicolor Jasper, Pear Shape, Opaque

36.6 x 33.2 mm

$ 61.44

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18.77ctw White Rainbow Moonstone, Marquise, Transparent
Rainbow Moonstone Product Video (669279)

18.77ctw White Rainbow Moonstone, Marquise, Transparent

23 x 8.4 mm

$ 336.51

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36.10ct Brown Tiger'S Eye, Round, Opaque

36.10ct Brown Tiger'S Eye, Round, Opaque

20 mm (calibrated)

$ 42.19

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1.11ct Green Sphene, Cushion, VS-SI

1.11ct Green Sphene, Cushion, VS-SI

6 x 5.7 mm

$ 66.89

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31.65ctw Multicolor Labradorite, Oval, Translucent

31.65ctw Multicolor Labradorite, Oval, Translucent

25 x 18 mm (calibrated)

$ 63.05

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1.11ct Yellow Sphene, Pear Shape, VS-SI

1.11ct Yellow Sphene, Pear Shape, VS-SI

8 x 5.5 mm

$ 36.49

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11.83ct Blue Chalcedony, Pear Shape, Opaque

11.83ct Blue Chalcedony, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 29.47

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1.58ct Purple Spinel, Marquise, VS
Spinel Product Video (369307)

1.58ct Purple Spinel, Marquise, VS

10.6 x 5.8 mm

$ 93.57

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1.32ct Orange Sphalerite, Emerald Cut, I1

1.32ct Orange Sphalerite, Emerald Cut, I1

7 x 5 mm (calibrated)

$ 65.74

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10.16ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

10.16ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

22.3 x 15.9 mm

$ 35.71

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0.71ct Green Peridot, Oval, VS

0.71ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 9.07

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10.24ct Blue Larimar, Oval, Translucent
Larimar Product Video (541686)

10.24ct Blue Larimar, Oval, Translucent

18 x 13 mm (calibrated)

$ 121.43

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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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26.17ct Pink Smithsonite, Cushion, Transparent
Smithsonite Product Video (380713)

26.17ct Pink Smithsonite, Cushion, Transparent

15 x 15 mm (calibrated)

$ 772.41

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47.80ct Multicolor Rhodochrosite, Oval, Opaque
Rhodochrosite Product Video (391975)

47.80ct Multicolor Rhodochrosite, Oval, Opaque

27 x 20 mm (calibrated)

$ 104.74

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9.89ct Green Tsavorite Garnet, Pear Shape, Translucent
Tsavorite Garnet Product Video (522842)

9.89ct Green Tsavorite Garnet, Pear Shape, Translucent

17.3 x 11.2 mm

$ 216.71

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16.68ct Green Druzy Variscite, Fancy, Opaque

16.68ct Green Druzy Variscite, Fancy, Opaque

31.8 x 15.2 mm

$ 70.77

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20.43ct Yellow Apatite, Emerald Cut, VS-SI
Apatite Product Video (384010)

20.43ct Yellow Apatite, Emerald Cut, VS-SI

18 x 13 mm (calibrated)

$ 610.45

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22.65ct Green Tsavorite Garnet, Trillion, Opaque
Tsavorite Garnet Product Video (521327)

22.65ct Green Tsavorite Garnet, Trillion, Opaque

19 x 19 mm (calibrated)

$ 496.31

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15.26ct Green Serpentine, Round, Translucent

15.26ct Green Serpentine, Round, Translucent

18 mm (calibrated)

$ 27.23

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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

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

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
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

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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