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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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3.42ct White Rutile Quartz, Oval, Transparent

3.42ct White Rutile Quartz, Oval, Transparent

12 x 8 mm (calibrated)

$ 10.16

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1.53ctw Green Peridot, Oval, VVS-VS

1.53ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 21.33

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1.47ct Yellow Tourmaline, Oval, VVS
Tourmaline Product Video (747875)

1.47ct Yellow Tourmaline, Oval, VVS

6.8 x 6.3 mm

$ 219.62

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0.94ct Purple Rhodolite Garnet, Oval, VS

0.94ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 24.97

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13.46ct Turquoise Larimar, Oval, Opaque

13.46ct Turquoise Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 160.70

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0.31ctw Black Diamond, Square, Opaque
Diamond Product Video (677975)

0.31ctw Black Diamond, Square, Opaque

2.7 x 2.5 mm

$ 154.38

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16.04ct Brown Tiger'S Eye, Fancy, Opaque

16.04ct Brown Tiger'S Eye, Fancy, Opaque

20.9 x 8.8 mm

$ 1.59

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8.27ct Yellow Citrine, Emerald Cut, VVS

8.27ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 53.18

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8.36ct Pink Rose Quartz, Emerald Cut, Transparent

8.36ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 45.80

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3.80ct Brown Smoky Quartz, Round, VVS-VS

3.80ct Brown Smoky Quartz, Round, VVS-VS

11 mm (calibrated)

$ 6.24

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1.57ct Yellow Citrine, Square, VVS-VS
Citrine Product Video (514072)

1.57ct Yellow Citrine, Square, VVS-VS

7 x 7 mm (calibrated)

$ 8.61

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0.44ct Orange Spessartite Garnet, Oval, VS

0.44ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 13.15

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35.33ct White Dendritic Agate, Fancy, Opaque

35.33ct White Dendritic Agate, Fancy, Opaque

35.2 x 18.4 mm

$ 24.63

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2.15ctw Red Pyrope Garnet, Marquise, VVS-VS

2.15ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5.1 mm

$ 18.84

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0.86ct Green Peridot, Oval, VS

0.86ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.99

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7.47ctw Green Prehnite, Oval, Transparent

7.47ctw Green Prehnite, Oval, Transparent

11.4 x 8.7 mm

$ 13.64

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0.79ct Yellow Citrine, Square, VS

0.79ct Yellow Citrine, Square, VS

5.7 x 5.7 mm

$ 5.19

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4.17ctw White Topaz, Square, VVS-VS

4.17ctw White Topaz, Square, VVS-VS

4 x 4 mm (calibrated)

$ 33.58

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4.21ct Yellow Citrine, Briolette, VVS-VS

4.21ct Yellow Citrine, Briolette, VVS-VS

12 x 8 mm (calibrated)

$ 22.69

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0.49ct Green Peridot, Marquise, VVS-VS

0.49ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 7.32

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49.59ct Green Variscite, Fancy, Opaque
Variscite Product Video (650420)

49.59ct Green Variscite, Fancy, Opaque

34.3 x 27.4 mm

$ 58.28

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5.28ct Multicolor Fire Agate, Fancy, Opaque

5.28ct Multicolor Fire Agate, Fancy, Opaque

12 x 10 mm (calibrated)

$ 40.60

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18.36ct Multicolor Rainbow Pyrite, Oval, Opaque

18.36ct Multicolor Rainbow Pyrite, Oval, Opaque

23.4 x 16.5 mm

$ 47.55

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6.41ct Violet Amethyst, Pear Shape, VS

6.41ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 44.69

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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

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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