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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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13.44ct Green Cat'S Eye Tourmaline, Oval, Opaque

13.44ct Green Cat'S Eye Tourmaline, Oval, Opaque

14.9 x 12 mm

$ 1,673.28

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1.15ct White Topaz, Oval, Transparent

1.15ct White Topaz, Oval, Transparent

10.1 x 4.2 mm

$ 6.31

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5.10ct Brown Smoky Quartz, Emerald Cut, VS

5.10ct Brown Smoky Quartz, Emerald Cut, VS

10 x 10 mm (calibrated)

$ 13.98

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19.11ctw Brown Smoky Quartz, Flower Cut, Transparent
Smoky Quartz Product Video (600430)

19.11ctw Brown Smoky Quartz, Flower Cut, Transparent

16 x 12 mm (calibrated)

$ 70.97

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8.68ct Yellow Citrine, Emerald Cut, VVS-VS

8.68ct Yellow Citrine, Emerald Cut, VVS-VS

14 x 10 mm (calibrated)

$ 66.57

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0.94ct Purple Spinel, Cushion, VVS

0.94ct Purple Spinel, Cushion, VVS

6.1 x 5.2 mm

$ 78.02

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5.32ct Green Actinolite Cat'S Eye, Oval, Translucent

5.32ct Green Actinolite Cat'S Eye, Oval, Translucent

12.4 x 11.1 mm

$ 37.09

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6.42ctw Violet Amethyst, Oval, Transparent

6.42ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 25.40

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7.26ct Multicolor Amethyst Geode Slice, Fancy, Transparent

7.26ct Multicolor Amethyst Geode Slice, Fancy, Transparent

16.9 x 11.4 mm

$ 7.74

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4.08ct Yellow Rutile Quartz, Oval, Transparent

4.08ct Yellow Rutile Quartz, Oval, Transparent

12 x 8 mm (calibrated)

$ 11.17

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2.84ct Violet Amethyst, Pear Shape, VS

2.84ct Violet Amethyst, Pear Shape, VS

13 x 9 mm (calibrated)

$ 19.80

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8.70ct Multicolor Fire Agate, Fancy, Opaque

8.70ct Multicolor Fire Agate, Fancy, Opaque

15 x 12.3 mm

$ 65.39

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1.20ct Green Prehnite, Oval, Transparent

1.20ct Green Prehnite, Oval, Transparent

6.6 x 5.2 mm

$ 13.15

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1.10ct Green Peridot, Cushion, VS

1.10ct Green Peridot, Cushion, VS

8 x 6 mm (calibrated)

$ 18.08

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0.54ct Orange Sphalerite, Round, SI

0.54ct Orange Sphalerite, Round, SI

4.5 mm (calibrated)

$ 26.89

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4.79ct Yellow Rutile Quartz, Oval, Transparent

4.79ct Yellow Rutile Quartz, Oval, Transparent

13 x 9 mm (calibrated)

$ 13.13

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1.25ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.25ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 4.8 mm

$ 9.96

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1.00ct Yellow Beryl, Trillion, VVS

1.00ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 19.92

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8.46ct Brown Smoky Quartz, Emerald Cut, VVS-VS

8.46ct Brown Smoky Quartz, Emerald Cut, VVS-VS

12 x 12 mm (calibrated)

$ 14.33

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1.58ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

1.58ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

6.4 x 4.2 mm

$ 4.99

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21.68ct Gray Hematite, Emerald Cut, Opaque

21.68ct Gray Hematite, Emerald Cut, Opaque

20.5 x 12.2 mm

$ 19.95

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0.81ct Multicolor Opal, Pear Shape, Transparent

0.81ct Multicolor Opal, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 20.17

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21.60ctw Multicolor Fossil Coral, Oval, Opaque

21.60ctw Multicolor Fossil Coral, Oval, Opaque

18 x 12.3 mm

$ 38.58

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1.60ct Purple Spinel, Cushion, VVS-VS

1.60ct Purple Spinel, Cushion, VVS-VS

7.2 x 6.5 mm

$ 100.98

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 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 -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 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

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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