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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
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Bi-color Untreated Gemstones
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.48ct Orange Sphalerite, Round, SI

0.48ct Orange Sphalerite, Round, SI

4.5 mm (calibrated)

$ 23.90

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10.25ctw Brown Smoky Quartz, Round, VS

10.25ctw Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 33.70

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11.80ct Pink Kunzite, Cushion, VVS-VS
Kunzite Product Video (695125)

11.80ct Pink Kunzite, Cushion, VVS-VS

13.8 x 11.1 mm

$ 293.82

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3.24ctw Brown Tourmaline, Oval, VVS-VS

3.24ctw Brown Tourmaline, Oval, VVS-VS

7.3 x 5.3 mm

$ 134.89

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1.25ct Violet Spinel, Cushion, VS
Spinel Product Video (545749)

1.25ct Violet Spinel, Cushion, VS

6.6 x 5.8 mm

$ 92.68

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3.59ctw Orange Hessonite Garnet, Emerald Cut, VS

3.59ctw Orange Hessonite Garnet, Emerald Cut, VS

5 x 5 mm (calibrated)

$ 70.80

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44.41ct Red Strawberry Quartz, Fancy, Opaque

44.41ct Red Strawberry Quartz, Fancy, Opaque

39 x 12.4 mm

$ 4.42

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10.56ct Pink Rose Quartz, Emerald Cut, Transparent

10.56ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 57.85

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23.18ctw Black Spinel, Oval, Opaque

23.18ctw Black Spinel, Oval, Opaque

16 x 12 mm (calibrated)

$ 98.60

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2.96ct Multicolor Labradorite, Baguette, Translucent

2.96ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 4.07

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11.39ct Multicolor Labradorite, Pear Shape, Translucent

11.39ct Multicolor Labradorite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 25.19

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8.93ct Black Tourmaline, Emerald Cut, Opaque

8.93ct Black Tourmaline, Emerald Cut, Opaque

14.1 x 10.4 mm

$ 44.47

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3.60ct White Topaz, Round, VVS-VS

3.60ct White Topaz, Round, VVS-VS

9.5 mm (calibrated)

$ 31.67

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34.50ct Multicolor Jasper, Cushion, Opaque

34.50ct Multicolor Jasper, Cushion, Opaque

26 x 24.6 mm

$ 16.63

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3.31ct Multicolor Labradorite, Marquise, Translucent

3.31ct Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 7.32

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3.72ct Multicolor Coral, Pear Shape, Opaque

3.72ct Multicolor Coral, Pear Shape, Opaque

14.6 x 9.5 mm

$ 11.54

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6.63ctw Pink Strawberry Quartz, Round, Translucent

6.63ctw Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 101.69

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37.71ct Multicolor Moss Agate, Oval, Translucent

37.71ct Multicolor Moss Agate, Oval, Translucent

34.8 x 23.7 mm

$ 31.30

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1.48ct White Sillimanite Cat'S Eye, Oval, Transparent

1.48ct White Sillimanite Cat'S Eye, Oval, Transparent

6.3 x 5.9 mm

$ 5.68

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24.72ct Multicolor Pietersite, Oval, Opaque

24.72ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 98.49

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4.96ct Yellow Citrine, Oval, VVS-VS

4.96ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 29.78

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3.37ct Yellow Citrine, Emerald Cut, VVS-VS

3.37ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 25.85

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1.62ct Green Tourmaline, Oval, VS

1.62ct Green Tourmaline, Oval, VS

7.4 x 7 mm

$ 188.24

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5.20ct Pink Strawberry Quartz, Oval, Translucent

5.20ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 62.15

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

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 always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
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

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate
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