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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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1.51ct Multicolor Spectrolite, Round, Opaque

1.51ct Multicolor Spectrolite, Round, Opaque

8 mm (calibrated)

$ 6.91

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23.68ct Green Aventurine, Round, Opaque

23.68ct Green Aventurine, Round, Opaque

20 mm (calibrated)

$ 28.79

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8.32ctw Yellow Citrine, Oval, VVS-VS

8.32ctw Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 58.01

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2.30ct Green Chrysoprase, Pear Shape, Opaque

2.30ct Green Chrysoprase, Pear Shape, Opaque

9.8 x 7.3 mm

$ 28.64

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13.90ctw Green Jadeite, Round, Translucent

13.90ctw Green Jadeite, Round, Translucent

12 mm (calibrated)

$ 45.68

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3.98ct Violet Amethyst, Pear Shape, VVS-VS

3.98ct Violet Amethyst, Pear Shape, VVS-VS

14 x 10 mm (calibrated)

$ 26.16

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4.15ct Yellow Citrine, Briolette, VVS-VS

4.15ct Yellow Citrine, Briolette, VVS-VS

12 x 8 mm (calibrated)

$ 23.24

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0.91ct Purple Sapphire, Cushion, VS
Sapphire Product Video (448603)

0.91ct Purple Sapphire, Cushion, VS

6.3 x 4.2 mm

$ 480.55

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6.96ct Brown Smoky Quartz, Emerald Cut, VVS

6.96ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 8.62

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36.70ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

36.70ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

28.5 x 18 mm

$ 16.45

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6.03ct Yellow Citrine, Oval, VVS

6.03ct Yellow Citrine, Oval, VVS

13 x 10 mm

$ 36.54

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4.76ct Multicolor Agate, Round, Opaque

4.76ct Multicolor Agate, Round, Opaque

11 mm (calibrated)

$ 8.06

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7.71ct Violet Amethyst, Pear Shape, VVS-VS
Amethyst Product Video (459823)

7.71ct Violet Amethyst, Pear Shape, VVS-VS

17.2 x 12.8 mm

$ 59.13

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6.41ct Multicolor Agate, Oval, Opaque

6.41ct Multicolor Agate, Oval, Opaque

11.6 x 10.5 mm

$ 6.07

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3.26ctw Orange Moonstone, Oval, Translucent

3.26ctw Orange Moonstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.52

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2.12ct Orange Hessonite Garnet, Oval, VS-SI

2.12ct Orange Hessonite Garnet, Oval, VS-SI

8.4 x 6.9 mm

$ 30.20

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26.27ct Blue Aventurine, Fancy, Opaque

26.27ct Blue Aventurine, Fancy, Opaque

34.3 x 10.2 mm

$ 7.85

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2.08ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.08ctw White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.83

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1.83ct Green Sphene, Oval, Transparent

1.83ct Green Sphene, Oval, Transparent

7.3 x 6.6 mm

$ 10.03

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3.00ct White Rainbow Moonstone, Oval, Transparent

3.00ct White Rainbow Moonstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 98.64

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6.48ct Pink Rose Quartz, Emerald Cut, Transparent

6.48ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 35.50

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4.62ct Pink Morganite, Pear Shape, Transparent

4.62ct Pink Morganite, Pear Shape, Transparent

11.8 x 9 mm

$ 19.17

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2.00ct Yellow Citrine, Round, VVS-VS

2.00ct Yellow Citrine, Round, VVS-VS

8 mm (calibrated)

$ 15.94

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57.06ctw Multicolor Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (690538)

57.06ctw Multicolor Tourmaline, Flower Cut, Transparent

25.6 x 21.7 mm

$ 1,112.19

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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 can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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