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Untreated Gemstones

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

Untreated Gemstones Weight
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Yellow Untreated Gemstones
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0.78ct Yellow Morganite, Cushion, VS

0.78ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 47.00

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6.83ct Violet Amethyst, Pear Shape, VVS-VS

6.83ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 52.38

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1.11ctw Yellow Citrine, Pear Shape, VVS

1.11ctw Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 8.85

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6.09ctw Violet Amethyst, Oval, Transparent

6.09ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 33.37

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0.54ct Orange Spessartite Garnet, Oval, VS-SI

0.54ct Orange Spessartite Garnet, Oval, VS-SI

5.1 x 4.2 mm

$ 16.14

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1.04ct Blue Kyanite, Round, SI

1.04ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 25.90

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5.38ct Yellow Citrine, Oval, VVS-VS

5.38ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 32.30

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12.21ct Pink Rose Quartz, Emerald Cut, Transparent

12.21ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 66.89

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27.17ct Multicolor Boulder Opal, Cushion, Opaque
Boulder Opal Product Video (523673)

27.17ct Multicolor Boulder Opal, Cushion, Opaque

33.3 x 11.9 mm

$ 148.84

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1.10ct Yellow Citrine, Emerald Cut, VS

1.10ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 8.76

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1.15ctw Green Peridot, Marquise, VS

1.15ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 9.16

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1.27ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.27ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 25.30

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1.09ct Orange Fire Opal, Oval, Transparent

1.09ct Orange Fire Opal, Oval, Transparent

9.1 x 6.6 mm

$ 38.00

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4.79ctw Multicolor Labradorite, Marquise, Translucent

4.79ctw Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 10.59

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5.77ct Brown Tiger'S Eye, Oval, Opaque

5.77ct Brown Tiger'S Eye, Oval, Opaque

11 x 9 mm (calibrated)

$ 5.74

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1.66ct Red Tourmaline, Cushion, VS

1.66ct Red Tourmaline, Cushion, VS

8.3 x 6.7 mm

$ 248.00

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6.09ct Green Druzy Variscite, Fancy, Opaque

6.09ct Green Druzy Variscite, Fancy, Opaque

21.6 x 15.5 mm

$ 6.24

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4.72ct Yellow Citrine, Oval, VVS-VS

4.72ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 28.34

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9.29ctw Multicolor Pietersite, Round, Opaque

9.29ctw Multicolor Pietersite, Round, Opaque

14 mm (calibrated)

$ 22.76

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1.67ct Pink Tourmaline, Oval, VVS-VS
Tourmaline Product Video (525623)

1.67ct Pink Tourmaline, Oval, VVS-VS

6.9 x 6.5 mm

$ 256.15

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1.12ct Yellow Sphene, Oval, Transparent

1.12ct Yellow Sphene, Oval, Transparent

6.7 x 5.9 mm

$ 5.58

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3.12ct Yellow Apatite, Pear Shape, VS-SI

3.12ct Yellow Apatite, Pear Shape, VS-SI

13 x 9 mm (calibrated)

$ 102.55

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2.53ct Multicolor Tourmaline, Fancy, Transparent

2.53ct Multicolor Tourmaline, Fancy, Transparent

10.7 x 10.5 mm

$ 63.00

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2.57ctw Red Rhodolite Garnet, Square, VS

2.57ctw Red Rhodolite Garnet, Square, VS

4.8 x 4.7 mm

$ 22.49

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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 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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
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
→ View All GemSelect Reviews on Bizrate
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