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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
Untreated Gemstones Price
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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1.83ctw Yellow Citrine, Square, VVS-VS

1.83ctw Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 14.04

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3.38ctw White Rainbow Moonstone, Square, Transparent

3.38ctw White Rainbow Moonstone, Square, Transparent

3.2 x 3.1 mm

$ 62.96

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45.20ct Violet Amethyst, Cushion, VVS-VS
Amethyst Product Video (638380)

45.20ct Violet Amethyst, Cushion, VVS-VS

24 x 20.1 mm

$ 315.13

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30.58ct Green Maw-Sit-Sit, Oval, Opaque

30.58ct Green Maw-Sit-Sit, Oval, Opaque

20 x 15 mm (calibrated)

$ 100.50

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16.52ct Brown Moonstone, Oval, Translucent

16.52ct Brown Moonstone, Oval, Translucent

20 x 15 mm (calibrated)

$ 36.20

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10.87ct Purple Kunzite, Cushion, VVS-VS
Kunzite Product Video (693496)

10.87ct Purple Kunzite, Cushion, VVS-VS

12.5 x 12.3 mm

$ 299.14

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 27.49

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16.02ct Pink Rose Quartz, Oval, Translucent

16.02ct Pink Rose Quartz, Oval, Translucent

18 x 13 mm (calibrated)

$ 21.06

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2.79ctw Green Tsavorite Garnet, Square, VVS-VS
Tsavorite Garnet Product Video (346284)

2.79ctw Green Tsavorite Garnet, Square, VVS-VS

2.4 x 2.4 mm

$ 259.82

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0.95ctw Yellow Citrine, Marquise, VVS-VS

0.95ctw Yellow Citrine, Marquise, VVS-VS

7.8 x 4.1 mm

$ 5.29

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4.01ct Brown Smoky Quartz, Round, VVS-VS

4.01ct Brown Smoky Quartz, Round, VVS-VS

11 mm (calibrated)

$ 6.59

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61.37ct Multicolor Jasper, Pear Shape, Opaque

61.37ct Multicolor Jasper, Pear Shape, Opaque

39.7 x 32 mm

$ 38.33

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7.88ct Pink Rose Quartz, Emerald Cut, Transparent

7.88ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 43.17

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5.55ct Pink Morganite, Oval, Translucent

5.55ct Pink Morganite, Oval, Translucent

13.7 x 8.1 mm

$ 55.28

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23.16ct White Howlite, Oval, Opaque

23.16ct White Howlite, Oval, Opaque

27 x 20 mm (calibrated)

$ 11.54

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3.88ct Yellow Citrine, Oval, VVS-VS

3.88ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 30.92

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3.50ctw Brown Smoky Quartz, Round, VS

3.50ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.67

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23.45ctw White Rainbow Moonstone, Round, Transparent
Rainbow Moonstone Product Video (669282)

23.45ctw White Rainbow Moonstone, Round, Transparent

15 mm (calibrated)

$ 350.34

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3.74ct Multicolor Fire Agate, Fancy, Opaque
Fire Agate Product Video (683322)

3.74ct Multicolor Fire Agate, Fancy, Opaque

11.6 x 8.5 mm

$ 28.75

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3.91ct Yellow Citrine, Oval, VS

3.91ct Yellow Citrine, Oval, VS

14 x 9 mm (calibrated)

$ 29.99

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13.02ct Green Serpentine, Oval, Translucent

13.02ct Green Serpentine, Oval, Translucent

21.7 x 13.6 mm

$ 27.88

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5.37ct Multicolor Fire Agate, Fancy, Opaque

5.37ct Multicolor Fire Agate, Fancy, Opaque

13.3 x 10.5 mm

$ 45.82

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0.28ct Orange Spessartite Garnet, Oval, VS
Spessartite Garnet Product Video (699332)

0.28ct Orange Spessartite Garnet, Oval, VS

4.2 x 3.2 mm

$ 5.20

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9.24ct Multicolor Fire Agate, Fancy, Translucent

9.24ct Multicolor Fire Agate, Fancy, Translucent

18 x 13 mm (calibrated)

$ 79.46

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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

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 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

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

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate
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