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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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2.27ctw Purple Rhodolite Garnet, Round, VS

2.27ctw Purple Rhodolite Garnet, Round, VS

5 mm (calibrated)

$ 49.74

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2.21ct Blue Kyanite, Oval, SI

2.21ct Blue Kyanite, Oval, SI

9.7 x 6.4 mm

$ 44.02

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1.18ctw Green Demantoid Garnet, Oval, VVS-VS

1.18ctw Green Demantoid Garnet, Oval, VVS-VS

4.4 x 3.5 mm

$ 129.28

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8.35ct Green Prehnite, Fancy, Transparent

8.35ct Green Prehnite, Fancy, Transparent

18.2 x 11.8 mm

$ 11.61

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0.82ctw Green Peridot, Pear Shape, VS

0.82ctw Green Peridot, Pear Shape, VS

6 x 4 mm (calibrated)

$ 6.28

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3.20ct Pink Rose Quartz, Emerald Cut, Transparent

3.20ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 17.53

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5.22ct Brown Rutile Quartz, Round, Transparent

5.22ct Brown Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 10.40

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25.76ct Brown Moonstone, Oval, Opaque

25.76ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 42.33

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1.62ct Yellow Beryl, Round, VVS-VS

1.62ct Yellow Beryl, Round, VVS-VS

8 mm (calibrated)

$ 32.27

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4.57ctw Pink Malaya Garnet, Round, VS
Malaya Garnet Product Video (371613)

4.57ctw Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 180.24

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17.59ct Violet Amethyst, Pear Shape, VVS

17.59ct Violet Amethyst, Pear Shape, VVS

21.1 x 16 mm

$ 122.64

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5.81ct Yellow Cat'S Eye Opal, Oval, Opaque

5.81ct Yellow Cat'S Eye Opal, Oval, Opaque

14 x 10 mm (calibrated)

$ 17.36

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1.42ct Blue Kyanite, Oval, VS-SI

1.42ct Blue Kyanite, Oval, VS-SI

8 x 6 mm (calibrated)

$ 29.56

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1.21ctw Yellow Citrine, Heart, VVS

1.21ctw Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 8.43

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3.04ctw Yellow Golden Beryl, Oval, VS

3.04ctw Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 66.62

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10.45ct White Quartz, Emerald Cut, VVS

10.45ct White Quartz, Emerald Cut, VVS

15 x 15 mm (calibrated)

$ 34.35

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3.25ct Multicolor Fire Agate, Oval, Opaque

3.25ct Multicolor Fire Agate, Oval, Opaque

10.5 x 7.4 mm

$ 24.99

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2.11ct Green Tourmaline, Emerald Cut, VVS

2.11ct Green Tourmaline, Emerald Cut, VVS

18.3 x 3.6 mm

$ 57.80

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12.06ct Multicolor Agate, Oval, Opaque

12.06ct Multicolor Agate, Oval, Opaque

16 x 12.9 mm

$ 12.01

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1.35ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

1.35ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

11.2 x 4.6 mm

$ 47.33

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0.57ctw Blue Kyanite, Round, VS-SI

0.57ctw Blue Kyanite, Round, VS-SI

3.5 mm (calibrated)

$ 10.22

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1.10ct Orange Hessonite Garnet, Round, VVS-VS

1.10ct Orange Hessonite Garnet, Round, VVS-VS

6.5 mm (calibrated)

$ 21.91

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7.61ct Brown Smoky Quartz, Emerald Cut, VVS-VS

7.61ct Brown Smoky Quartz, Emerald Cut, VVS-VS

12 x 12 mm (calibrated)

$ 14.92

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24.14ct Pink Rose Quartz, Oval, Transparent

24.14ct Pink Rose Quartz, Oval, Transparent

22.1 x 18.1 mm

$ 39.43

View Gem
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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

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD 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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