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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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1.03ct Pink Tourmaline, Emerald Cut, VVS-VS

1.03ct Pink Tourmaline, Emerald Cut, VVS-VS

8.2 x 3.7 mm

$ 77.87

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18.98ct Multicolor Rainbow Pyrite, Heart, Opaque

18.98ct Multicolor Rainbow Pyrite, Heart, Opaque

24.5 x 22.4 mm

$ 49.15

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0.96ctw Yellow Citrine, Heart, VVS-VS

0.96ctw Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 7.65

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25.34ct Gray Jadeite, Oval, Opaque

25.34ct Gray Jadeite, Oval, Opaque

23.3 x 17.4 mm

$ 41.64

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3.18ct Green Prehnite, Oval, Transparent

3.18ct Green Prehnite, Oval, Transparent

11 x 7.7 mm

$ 9.75

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0.96ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.96ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 3.00

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1.82ct Orange Hessonite Garnet, Cushion, VS-SI

1.82ct Orange Hessonite Garnet, Cushion, VS-SI

9 x 7 mm (calibrated)

$ 39.88

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6.50ct Black Cat'S Eye Scapolite, Round, Translucent

6.50ct Black Cat'S Eye Scapolite, Round, Translucent

12 mm (calibrated)

$ 35.61

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8.75ct Pink Rose Quartz, Emerald Cut, Transparent

8.75ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 47.94

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4.19ct Multicolor Fire Agate, Oval, Opaque

4.19ct Multicolor Fire Agate, Oval, Opaque

13 x 9 mm (calibrated)

$ 28.63

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1.97ct Green Tourmaline, Emerald Cut, VVS-VS

1.97ct Green Tourmaline, Emerald Cut, VVS-VS

15.6 x 3.8 mm

$ 41.54

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58.64ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (753788)

58.64ct Violet Amethyst, Pear Shape, VVS

30 x 22 mm (calibrated)

$ 486.71

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18.71ct Violet Amethyst, Cushion, VVS

18.71ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 130.44

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18.76ct Violet Amethyst, Round, VVS

18.76ct Violet Amethyst, Round, VVS

18 mm (calibrated)

$ 130.79

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1.11ct Pink Tourmaline, Emerald Cut, SI

1.11ct Pink Tourmaline, Emerald Cut, SI

7.9 x 4.7 mm

$ 66.89

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8.77ct Black Tourmaline, Emerald Cut, Opaque

8.77ct Black Tourmaline, Emerald Cut, Opaque

16 x 8 mm (calibrated)

$ 43.67

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41.94ct Multicolor Jasper, Marquise, Opaque

41.94ct Multicolor Jasper, Marquise, Opaque

39.9 x 19.9 mm

$ 32.83

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2.09ct Orange Hessonite Garnet, Oval, VS-SI

2.09ct Orange Hessonite Garnet, Oval, VS-SI

8.5 x 7 mm

$ 34.35

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1.79ct Violet Amethyst, Marquise, VS

1.79ct Violet Amethyst, Marquise, VS

12.1 x 6.1 mm

$ 13.73

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1.48ct Blue Kyanite, Oval, SI

1.48ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 29.48

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0.68ct Yellow Color-Change Diaspore, Cushion, VS

0.68ct Yellow Color-Change Diaspore, Cushion, VS

5.6 x 4.8 mm

$ 23.85

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89.72ctw Bi-Color Tourmaline, Fancy, Translucent
Tourmaline Product Video (666920)

89.72ctw Bi-Color Tourmaline, Fancy, Translucent

31.7 x 21.8 mm

$ 1,340.42

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0.80ct Green Peridot, Oval, VS

0.80ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.58

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1.03ct Yellow Citrine, Emerald Cut, VVS-VS

1.03ct Yellow Citrine, Emerald Cut, VVS-VS

12.2 x 4.1 mm

$ 8.21

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

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate

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

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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