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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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3.56ct Green Prehnite, Oval, Transparent

3.56ct Green Prehnite, Oval, Transparent

10 x 8 mm (calibrated)

$ 10.92

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7.67ct Multicolor Agate, Oval, Opaque

7.67ct Multicolor Agate, Oval, Opaque

12.5 x 10.5 mm

$ 7.64

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14.50ct White Rainbow Moonstone, Oval, Translucent

14.50ct White Rainbow Moonstone, Oval, Translucent

17.1 x 12.6 mm

$ 14.44

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1.43ct Yellow Citrine, Emerald Cut, VVS

1.43ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 11.40

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11.75ctw Green Amazonite, Round, Opaque

11.75ctw Green Amazonite, Round, Opaque

9 mm (calibrated)

$ 28.70

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2.98ct White Moonstone, Round, Translucent

2.98ct White Moonstone, Round, Translucent

8 mm (calibrated)

$ 8.17

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0.87ctw Red Pyrope Garnet, Square, VS

0.87ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 6.67

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1.23ct Green Sphene, Oval, Transparent

1.23ct Green Sphene, Oval, Transparent

6.9 x 5.8 mm

$ 6.13

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2.38ctw White Rainbow Moonstone, Oval, Transparent

2.38ctw White Rainbow Moonstone, Oval, Transparent

7.1 x 6.1 mm

$ 78.24

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3.31ct Multicolor Opal, Oval, Opaque

3.31ct Multicolor Opal, Oval, Opaque

13 x 10.2 mm

$ 83.25

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7.05ct Green Actinolite Cat'S Eye, Oval, Translucent

7.05ct Green Actinolite Cat'S Eye, Oval, Translucent

14.5 x 10.8 mm

$ 49.15

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5.05ct Yellow Citrine, Cushion, VVS

5.05ct Yellow Citrine, Cushion, VVS

14.8 x 9 mm

$ 38.74

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1.10ct White Rainbow Moonstone, Oval, Transparent

1.10ct White Rainbow Moonstone, Oval, Transparent

8.3 x 6.3 mm

$ 36.16

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0.86ctw Multicolor Opal, Pear Shape, Transparent

0.86ctw Multicolor Opal, Pear Shape, Transparent

8 x 5 mm (calibrated)

$ 21.41

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2.62ct Brown Tiger'S Eye, Oval, Opaque

2.62ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 2.61

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3.43ct White Topaz, Round, VVS-VS

3.43ct White Topaz, Round, VVS-VS

9.5 mm (calibrated)

$ 26.30

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12.24ctw Black Star Diopside, Oval, Opaque

12.24ctw Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 50.80

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3.67ct Yellow Citrine, Oval, VVS-VS

3.67ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 28.15

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19.76ct Violet Amethyst, Round, VVS-VS

19.76ct Violet Amethyst, Round, VVS-VS

18 mm (calibrated)

$ 137.76

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2.15ct Orange Coral, Oval, Opaque
Coral Product Video (499193)

2.15ct Orange Coral, Oval, Opaque

12.1 x 5.1 mm

$ 353.33

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1.39ct Green Tourmaline, Oval, Transparent

1.39ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 23.82

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4.40ct Pink Strawberry Quartz, Round, Translucent

4.40ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 26.90

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5.52ctw Purple Rhodolite Garnet, Oval, VS

5.52ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 117.38

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37.59ct Multicolor Rhodochrosite, Oval, Opaque

37.59ct Multicolor Rhodochrosite, Oval, Opaque

31.7 x 16.2 mm

$ 99.25

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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 -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 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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