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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
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13.48ctw Black Spinel, Round, Opaque

13.48ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 44.31

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0.18ct Pink Morganite, Round, VS

0.18ct Pink Morganite, Round, VS

4 mm (calibrated)

$ 7.47

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2.70ctw White Topaz, Cushion, VVS-VS

2.70ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 14.79

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4.28ct Yellow Rutile Topaz, Oval, Transparent

4.28ct Yellow Rutile Topaz, Oval, Transparent

11.3 x 9.5 mm

$ 88.81

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3.21ctw White Topaz, Cushion, VVS-VS

3.21ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 17.59

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8.26ctw White Topaz, Square, VVS

8.26ctw White Topaz, Square, VVS

5 x 5 mm (calibrated)

$ 68.83

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0.90ct Yellow Morganite, Cushion, VS

0.90ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 54.23

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1.66ct Purple Spinel, Cushion, VS

1.66ct Purple Spinel, Cushion, VS

7.2 x 5.7 mm

$ 114.58

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3.89ctw White Topaz, Square, VS-SI

3.89ctw White Topaz, Square, VS-SI

3.5 x 3.5 mm

$ 29.83

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0.31ct Blue Aquamarine, Round, VS-SI

0.31ct Blue Aquamarine, Round, VS-SI

4.5 mm (calibrated)

$ 43.23

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0.16ctw White Diamond, Round, VVS-VS

0.16ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 286.04

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6.66ct Pink Morganite, Trillion, Transparent

6.66ct Pink Morganite, Trillion, Transparent

13 x 13 mm (calibrated)

$ 72.97

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14.75ctw Black Spinel, Cushion, Opaque

14.75ctw Black Spinel, Cushion, Opaque

12 x 10 mm (calibrated)

$ 80.81

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3.44ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (381930)

3.44ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 137.36

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1.64ct Brown Diamond, Cushion, VS-SI
Diamond Product Video (460450)

1.64ct Brown Diamond, Cushion, VS-SI

6.7 x 6 mm

$ 3,773.25

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 13.28

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1.61ct Pink Morganite, Round, VS

1.61ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 123.47

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3.20ct Yellow Golden Beryl, Pear Shape, VS-SI
Golden Beryl Product Video (575430)

3.20ct Yellow Golden Beryl, Pear Shape, VS-SI

14 x 9 mm (calibrated)

$ 77.13

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7.49ctw White Topaz, Square, VVS

7.49ctw White Topaz, Square, VVS

5 x 5 mm (calibrated)

$ 62.52

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14.24ctw Black Spinel, Oval, Opaque

14.24ctw Black Spinel, Oval, Opaque

14 x 10 mm (calibrated)

$ 54.60

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7.63ctw White Topaz, Square, VVS-VS

7.63ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 60.71

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0.69ct Yellow Beryl, Pear Shape, VVS

0.69ct Yellow Beryl, Pear Shape, VVS

8 x 5 mm (calibrated)

$ 15.12

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0.17ctw White Diamond, Round, VVS-VS

0.17ctw White Diamond, Round, VVS-VS

2.9 mm (calibrated)

$ 308.86

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1.43ct Purple Spinel, Cushion, VS

1.43ct Purple Spinel, Cushion, VS

6.5 x 6.5 mm

$ 100.01

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 -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
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

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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