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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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3.62ctw Yellow Citrine, Round, VVS

3.62ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 25.24

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1.59ctw Green Peridot, Oval, VVS-VS

1.59ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 22.17

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10.02ct Pink Rose Quartz, Oval, Transparent

10.02ct Pink Rose Quartz, Oval, Transparent

15.9 x 13 mm

$ 54.89

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0.59ct Green Peridot, Marquise, VS

0.59ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.81

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7.50ct Yellow Citrine, Emerald Cut, VVS

7.50ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 57.52

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2.60ct Orange Hessonite Garnet, Oval, VS-SI

2.60ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7.5 mm

$ 42.73

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65.90ctw Bi-Color Tourmaline, Flower Cut, Translucent
Tourmaline Product Video (472936)

65.90ctw Bi-Color Tourmaline, Flower Cut, Translucent

35.5 x 25.2 mm

$ 722.00

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20.73ct Pink Rose Quartz, Oval, Transparent

20.73ct Pink Rose Quartz, Oval, Transparent

17 x 17 mm (calibrated)

$ 45.43

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43.88ct Multicolor Jasper, Oval, Opaque

43.88ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 30.77

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23.38ct Black Tourmaline, Emerald Cut, Opaque

23.38ct Black Tourmaline, Emerald Cut, Opaque

21.1 x 12.4 mm

$ 116.43

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2.04ct Red Almandine Garnet, Baguette, VVS

2.04ct Red Almandine Garnet, Baguette, VVS

10 x 4.9 mm

$ 16.93

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2.37ct Green Peridot, Oval, VS

2.37ct Green Peridot, Oval, VS

8.7 x 7.6 mm

$ 89.61

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2.43ctw Multicolor Labradorite, Round, Translucent

2.43ctw Multicolor Labradorite, Round, Translucent

6 mm (calibrated)

$ 2.91

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3.85ctw Red Pyrope Garnet, Heart, VVS-VS

3.85ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 29.53

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1.34ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

1.34ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

8.5 x 4.4 mm

$ 70.73

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48.13ct Multicolor Ruby-Zoisite, Oval, Opaque
Ruby-Zoisite Product Video (300661)

48.13ct Multicolor Ruby-Zoisite, Oval, Opaque

32.2 x 28.3 mm

$ 95.87

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7.43ct Multicolor Agate, Oval, Opaque

7.43ct Multicolor Agate, Oval, Opaque

13 x 11 mm (calibrated)

$ 12.58

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1.54ct Multicolor Opal, Oval, Transparent

1.54ct Multicolor Opal, Oval, Transparent

10 x 7 mm (calibrated)

$ 38.35

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1.27ct Multicolor Opal, Oval, Transparent

1.27ct Multicolor Opal, Oval, Transparent

9.4 x 7.4 mm

$ 31.62

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40.47ct Multicolor Jasper, Oval, Opaque

40.47ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 44.34

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3.04ctw Yellow Beryl, Oval, VVS

3.04ctw Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 72.67

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1.16ct Red Rhodolite Garnet, Oval, VS

1.16ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 30.81

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3.96ctw Yellow Citrine, Oval, VVS

3.96ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 21.70

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1.78ctw Multicolor Andalusite, Round, VS

1.78ctw Multicolor Andalusite, Round, VS

3.7 mm

$ 97.51

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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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 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 -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 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 -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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