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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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Yellow Untreated Gemstones
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27.58ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (524016)

27.58ct Multicolor Quartz With Marcasite, Oval, Transparent

28.1 x 16.9 mm

$ 181.31

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25.91ct Green Aventurine, Fancy, Opaque

25.91ct Green Aventurine, Fancy, Opaque

34.2 x 10.3 mm

$ 2.59

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3.61ct Red Almandine Garnet, Pear Shape, VS

3.61ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 29.96

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33.54ct Green Tsavorite Garnet, Oval, Opaque
Tsavorite Garnet Product Video (521027)

33.54ct Green Tsavorite Garnet, Oval, Opaque

31.9 x 15.4 mm

$ 734.93

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2.24ct Green Chrysoprase, Baguette, Opaque

2.24ct Green Chrysoprase, Baguette, Opaque

8.8 x 6.4 mm

$ 27.89

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3.53ct Yellow Citrine, Pear Shape, VVS-VS

3.53ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 22.16

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36.65ct Multicolor Jasper, Pear Shape, Opaque

36.65ct Multicolor Jasper, Pear Shape, Opaque

30.5 x 18.4 mm

$ 20.81

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4.31ct Pink Rose Quartz, Emerald Cut, Transparent

4.31ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 21.46

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11.36ct Multicolor Boulder Opal, Cushion, Opaque

11.36ct Multicolor Boulder Opal, Cushion, Opaque

17.5 x 11.4 mm

$ 56.57

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70.11ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

70.11ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

38.7 x 33.3 mm

$ 69.83

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44.14ct Multicolor Jasper, Oval, Opaque

44.14ct Multicolor Jasper, Oval, Opaque

32.9 x 27.1 mm

$ 29.99

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17.75ct Violet Amethyst, Emerald Cut, VVS-VS

17.75ct Violet Amethyst, Emerald Cut, VVS-VS

18.1 x 14.1 mm

$ 123.75

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5.22ct Yellow Citrine, Oval, VVS-VS

5.22ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 31.34

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1.57ct Green Tourmaline, Round, Transparent

1.57ct Green Tourmaline, Round, Transparent

7.5 mm (calibrated)

$ 26.91

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2.10ctw Orange Citrine, Heart, VS

2.10ctw Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 17.43

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1.76ct Green Tourmaline, Emerald Cut, VS

1.76ct Green Tourmaline, Emerald Cut, VS

16.4 x 3.6 mm

$ 46.27

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0.86ct Orange Hessonite Garnet, Cushion, SI

0.86ct Orange Hessonite Garnet, Cushion, SI

5 x 5 mm (calibrated)

$ 16.97

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2.16ct Bi-Color Ametrine, Emerald Cut, VVS

2.16ct Bi-Color Ametrine, Emerald Cut, VVS

9 x 7 mm (calibrated)

$ 22.66

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1.11ctw Red Pyrope Garnet, Heart, VVS-VS

1.11ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 8.85

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2.69ct Pink Strawberry Quartz, Oval, Transparent

2.69ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.99

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0.48ctw Blue Kyanite, Round, VS-SI

0.48ctw Blue Kyanite, Round, VS-SI

3.7 mm

$ 8.61

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22.95ctw Multicolor Labradorite, Pear Shape, Translucent

22.95ctw Multicolor Labradorite, Pear Shape, Translucent

22.2 x 16 mm

$ 50.29

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1.36ct Pink Morganite, Round, VS

1.36ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 94.82

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1.08ct Purple Rhodolite Garnet, Oval, VS

1.08ct Purple Rhodolite Garnet, Oval, VS

7 x 5.4 mm

$ 40.34

View Gem
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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

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 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 -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

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