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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
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2.85ctw Red Rhodolite Garnet, Square, VS

2.85ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 24.95

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5.07ctw Green Peridot, Oval, VS

5.07ctw Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 55.54

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7.37ct Multicolor Ruby-Zoisite, Trillion, Opaque

7.37ct Multicolor Ruby-Zoisite, Trillion, Opaque

14.1 x 10.7 mm

$ 22.21

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0.95ct Green Tourmaline, Baguette, VVS

0.95ct Green Tourmaline, Baguette, VVS

7.6 x 4.1 mm

$ 33.12

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0.91ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.91ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

7.7 x 4.4 mm

$ 31.96

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8.45ct Violet Amethyst, Pear Shape, VS

8.45ct Violet Amethyst, Pear Shape, VS

18 x 13 mm (calibrated)

$ 64.24

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1.37ct Pink Morganite, Pear Shape, VS

1.37ct Pink Morganite, Pear Shape, VS

9.7 x 6.3 mm

$ 105.07

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14.88ct Green Aventurine, Oval, Translucent

14.88ct Green Aventurine, Oval, Translucent

20.2 x 14.2 mm

$ 14.82

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10.78ct Yellow Rutile Quartz, Cushion, Transparent

10.78ct Yellow Rutile Quartz, Cushion, Transparent

23.9 x 11.2 mm

$ 29.53

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2.76ct Pink Kunzite, Oval, VVS

2.76ct Pink Kunzite, Oval, VVS

9.4 x 7.4 mm

$ 68.72

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1.82ct Yellow Citrine, Round, VVS

1.82ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.69

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11.93ct Orange Moonstone, Round, Translucent

11.93ct Orange Moonstone, Round, Translucent

14 mm (calibrated)

$ 23.89

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1.40ct Pink Tourmaline, Oval, VVS
Tourmaline Product Video (743362)

1.40ct Pink Tourmaline, Oval, VVS

8.2 x 6.3 mm

$ 162.68

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5.74ct Violet Amethyst, Oval, Transparent

5.74ct Violet Amethyst, Oval, Transparent

13.5 x 10.4 mm

$ 34.30

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10.41ct White Rainbow Moonstone, Square, Transparent

10.41ct White Rainbow Moonstone, Square, Transparent

12.7 x 12.4 mm

$ 155.53

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1.69ct Orange Hessonite Garnet, Oval, VS-SI

1.69ct Orange Hessonite Garnet, Oval, VS-SI

7.7 x 6.4 mm

$ 33.66

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2.34ctw Violet Amethyst, Oval, VVS-VS

2.34ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 12.82

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25.96ct Brown Tiger'S Eye, Fancy, Opaque

25.96ct Brown Tiger'S Eye, Fancy, Opaque

37.5 x 9.5 mm

$ 7.76

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1.85ct Yellow Citrine, Trillion, VVS-VS

1.85ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 14.19

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8.30ct Multicolor Coral, Oval, Translucent

8.30ct Multicolor Coral, Oval, Translucent

16.1 x 12.8 mm

$ 25.93

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2.70ct Red Almandine Garnet, Pear Shape, VVS

2.70ct Red Almandine Garnet, Pear Shape, VVS

12 x 8 mm (calibrated)

$ 100.85

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8.21ctw White Topaz, Heart, VVS-VS

8.21ctw White Topaz, Heart, VVS-VS

10 x 10 mm (calibrated)

$ 68.14

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0.60ctw Blue Kyanite, Round, VS-SI

0.60ctw Blue Kyanite, Round, VS-SI

3.8 mm

$ 10.76

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6.71ct Violet Amethyst, Pear Shape, VVS-VS

6.71ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 46.78

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

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 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

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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