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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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2.10ct Purple Kunzite, Oval, VVS-VS

2.10ct Purple Kunzite, Oval, VVS-VS

7.2 x 6.6 mm

$ 57.78

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18.74ct Brown Moonstone, Oval, Opaque

18.74ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 41.07

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5.06ctw Yellow Citrine, Heart, VS

5.06ctw Yellow Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 33.27

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1.28ct Pink Tourmaline, Emerald Cut, SI

1.28ct Pink Tourmaline, Emerald Cut, SI

9.2 x 4.1 mm

$ 92.56

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7.58ct Violet Amethyst, Oval, Transparent

7.58ct Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 41.52

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0.72ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.72ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

5.9 x 4.3 mm

$ 26.74

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22.48ctw Multicolor Fossil Coral, Cushion, Opaque

22.48ctw Multicolor Fossil Coral, Cushion, Opaque

16 x 12 mm (calibrated)

$ 44.33

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2.48ctw White Opal, Oval, Transparent

2.48ctw White Opal, Oval, Transparent

10.4 x 7.3 mm

$ 51.97

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5.59ct Yellow Citrine, Oval, VVS-VS

5.59ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 33.56

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2.61ctw Orange Hessonite Garnet, Emerald Cut, VS

2.61ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 36.26

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3.03ctw White Topaz, Cushion, VVS-VS

3.03ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.60

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1.53ct Orange Hessonite Garnet, Oval, VS

1.53ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.6 mm

$ 30.48

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24.94ct Purple Ruby-Zoisite, Flower Cut, Opaque

24.94ct Purple Ruby-Zoisite, Flower Cut, Opaque

17.8 x 17.2 mm

$ 30.31

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4.61ctw Multicolor Labradorite, Round, Translucent

4.61ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 8.08

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4.58ct White Topaz, Oval, VS

4.58ct White Topaz, Oval, VS

11 x 9 mm (calibrated)

$ 25.09

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0.58ct Purple Spinel, Round, VS

0.58ct Purple Spinel, Round, VS

5 mm (calibrated)

$ 24.93

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1.18ct Orange Hessonite Garnet, Baguette, VVS-VS

1.18ct Orange Hessonite Garnet, Baguette, VVS-VS

6.9 x 4.7 mm

$ 25.85

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12.08ct Black Tourmaline, Oval, Opaque

12.08ct Black Tourmaline, Oval, Opaque

16.7 x 13.7 mm

$ 60.16

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31.84ct Multicolor Amethyst Geode Slice, Fancy, Transparent

31.84ct Multicolor Amethyst Geode Slice, Fancy, Transparent

25 x 24.9 mm

$ 33.93

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12.53ct Brown Smoky Quartz, Emerald Cut, VVS

12.53ct Brown Smoky Quartz, Emerald Cut, VVS

13 x 13 mm (calibrated)

$ 24.57

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0.75ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

0.75ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

12.2 x 3.8 mm

$ 23.90

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1.18ctw Yellow Citrine, Pear Shape, VVS-VS

1.18ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 6.47

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1.95ct Orange Hessonite Garnet, Cushion, SI

1.95ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 32.79

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0.13ct Green Kornerupine, Oval, VVS-VS

0.13ct Green Kornerupine, Oval, VVS-VS

3.6 x 2.6 mm

$ 7.12

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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 love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
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

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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