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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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37.98ct Multicolor Opal, Pear Shape, Opaque
Opal Product Video (667934)

37.98ct Multicolor Opal, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 94.57

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65.85ct Multicolor Ruby-Zoisite, Baguette, Opaque
Ruby-Zoisite Product Video (484041)

65.85ct Multicolor Ruby-Zoisite, Baguette, Opaque

25.7 x 22.3 mm

$ 108.22

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63.97ct Multicolor Rhodochrosite, Oval, Opaque
Rhodochrosite Product Video (471274)

63.97ct Multicolor Rhodochrosite, Oval, Opaque

39.9 x 25.6 mm

$ 109.33

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1.93ct Yellow Sphene, Pear Shape, VS
Sphene Product Video (381726)

1.93ct Yellow Sphene, Pear Shape, VS

9.4 x 6.8 mm

$ 159.05

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5.89ct Brown Cat'S Eye Opal, Oval, Translucent

5.89ct Brown Cat'S Eye Opal, Oval, Translucent

13.7 x 10.5 mm

$ 32.27

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1.04ct Yellow Sphalerite, Oval, SI-I1

1.04ct Yellow Sphalerite, Oval, SI-I1

7 x 5 mm (calibrated)

$ 51.79

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1.08ct Purple Spinel, Pear Shape, VS

1.08ct Purple Spinel, Pear Shape, VS

8.2 x 5.5 mm

$ 100.90

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20.80ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (522410)

20.80ct Multicolor Boulder Opal, Fancy, Opaque

32.3 x 16.8 mm

$ 113.94

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8.03ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (385931)

8.03ct Yellow Apatite, Pear Shape, VS

17 x 11 mm

$ 424.06

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7.75ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (385930)

7.75ct Yellow Apatite, Pear Shape, VS

14.9 x 12.5 mm

$ 409.26

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3.11ctw Multicolor Andalusite, Round, VS

3.11ctw Multicolor Andalusite, Round, VS

3.3 mm

$ 136.73

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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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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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21.74ct Pink Kunzite, Pear Shape, VS
Kunzite Product Video (437944)

21.74ct Pink Kunzite, Pear Shape, VS

23.6 x 11.7 mm

$ 476.37

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4.13ct Brown Moonstone, Flower Cut, Translucent

4.13ct Brown Moonstone, Flower Cut, Translucent

13 x 13 mm (calibrated)

$ 18.09

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1.20ct Yellow Chrysoberyl, Oval, VVS-VS
Chrysoberyl Product Video (366388)

1.20ct Yellow Chrysoberyl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 139.93

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24.56ct Green Aventurine, Round, Opaque

24.56ct Green Aventurine, Round, Opaque

20 mm (calibrated)

$ 24.89

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15.82ctw Black Spinel, Round, Opaque

15.82ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 52.00

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64.36ctw Multicolor Labradorite, Round, Translucent
Labradorite Product Video (712049)

64.36ctw Multicolor Labradorite, Round, Translucent

25.4 mm

$ 118.59

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0.93ctw Green Tsavorite Garnet, Round, VS
Tsavorite Garnet Product Video (473648)

0.93ctw Green Tsavorite Garnet, Round, VS

3.8 mm

$ 124.38

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13.54ctw Black Spinel, Round, Opaque

13.54ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 44.50

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43.77ct Multicolor Jasper, Pear Shape, Opaque

43.77ct Multicolor Jasper, Pear Shape, Opaque

40.1 x 21.9 mm

$ 47.96

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17.53ct Red Strawberry Quartz, Oval, Translucent

17.53ct Red Strawberry Quartz, Oval, Translucent

20 x 15 mm (calibrated)

$ 112.03

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12.30ct White Dendritic Agate, Pear Shape, Opaque

12.30ct White Dendritic Agate, Pear Shape, Opaque

21.2 x 13.1 mm

$ 24.50

View Gem
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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 -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
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 needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

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