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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
Untreated Gemstones Clarity
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For Example: 8-9
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1.51ct Pink Tourmaline, Emerald Cut, VS

1.51ct Pink Tourmaline, Emerald Cut, VS

8.7 x 4.9 mm

$ 109.19

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0.70ct White Topaz, Oval, VVS

0.70ct White Topaz, Oval, VVS

6.1 x 4.2 mm

$ 4.88

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1.52ct Pink Morganite, Round, VVS-VS

1.52ct Pink Morganite, Round, VVS-VS

8 mm (calibrated)

$ 83.27

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3.42ctw Yellow Citrine, Oval, VVS-VS

3.42ctw Yellow Citrine, Oval, VVS-VS

9.6 x 7.6 mm

$ 18.73

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2.41ctw Yellow Citrine, Round, VS

2.41ctw Yellow Citrine, Round, VS

7 mm (calibrated)

$ 16.00

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4.73ct Pink Rose Quartz, Emerald Cut, Transparent

4.73ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 23.56

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17.09ct Pink Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (438129)

17.09ct Pink Kunzite, Pear Shape, VVS-VS

23.9 x 10.9 mm

$ 340.43

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17.69ct Violet Amethyst, Cushion, VVS

17.69ct Violet Amethyst, Cushion, VVS

18 x 18 mm (calibrated)

$ 140.95

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3.24ct Green Prehnite, Round, Transparent/Translucent

3.24ct Green Prehnite, Round, Transparent/Translucent

9 mm (calibrated)

$ 14.55

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3.85ctw Red Pyrope Garnet, Marquise, VVS-VS

3.85ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6 mm

$ 33.75

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1.69ct Green Prehnite, Oval, Transparent

1.69ct Green Prehnite, Oval, Transparent

8.5 x 6.1 mm

$ 5.00

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3.33ctw Yellow Citrine, Round, VVS

3.33ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 26.54

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18.10ctw Brown Tiger'S Eye, Cushion, Opaque

18.10ctw Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 19.83

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0.79ct White Sillimanite Cat'S Eye, Oval, Transparent

0.79ct White Sillimanite Cat'S Eye, Oval, Transparent

5.3 x 5 mm

$ 3.04

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31.32ct Blue Turquoise, Oval, Opaque
Turquoise Product Video (754470)

31.32ct Blue Turquoise, Oval, Opaque

27 x 20 mm (calibrated)

$ 77.99

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7.66ct Multicolor Agate, Round, Opaque

7.66ct Multicolor Agate, Round, Opaque

12 mm (calibrated)

$ 12.96

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7.67ct Multicolor Agate, Sphere / Ball, Opaque
Agate Product Video (700152)

7.67ct Multicolor Agate, Sphere / Ball, Opaque

10 mm (calibrated)

$ 6.12

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3.17ctw Pink Strawberry Quartz, Oval, Transparent

3.17ctw Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 16.73

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1.46ctw Multicolor Opal, Round, Transparent

1.46ctw Multicolor Opal, Round, Transparent

6 mm (calibrated)

$ 34.08

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11.52ct Pink Rose Quartz, Emerald Cut, Transparent

11.52ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 63.10

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8.89ctw Black Spinel, Round, Opaque

8.89ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 34.10

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1.58ct Orange Hessonite Garnet, Cushion, VS

1.58ct Orange Hessonite Garnet, Cushion, VS

7 x 5 mm (calibrated)

$ 31.47

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0.76ct Yellow Morganite, Pear Shape, VVS-VS

0.76ct Yellow Morganite, Pear Shape, VVS-VS

8 x 5.7 mm

$ 33.31

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2.80ctw Yellow Citrine, Emerald Cut, VVS-VS

2.80ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 22.31

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 -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
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

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
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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