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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
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9.06ct Red Star Garnet, Oval, Opaque

9.06ct Red Star Garnet, Oval, Opaque

13.4 x 9.9 mm

$ 9.38

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1.19ct Red Rhodolite Garnet, Emerald Cut, VVS-VS

1.19ct Red Rhodolite Garnet, Emerald Cut, VVS-VS

5.7 x 4.8 mm

$ 53.55

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2.85ct Violet Amethyst, Trillion, VS

2.85ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.86

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1.41ct Green Tourmaline, Oval, Transparent

1.41ct Green Tourmaline, Oval, Transparent

7.1 x 5.8 mm

$ 24.17

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4.16ct Multicolor Opal, Oval, Transparent

4.16ct Multicolor Opal, Oval, Transparent

14 x 10.6 mm

$ 104.58

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1.07ct Orange Zircon, Oval, VVS

1.07ct Orange Zircon, Oval, VVS

6 x 4.9 mm

$ 15.99

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3.79ct Yellow Citrine, Oval, VS

3.79ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 29.07

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5.50ct Violet Amethyst, Cushion, VVS

5.50ct Violet Amethyst, Cushion, VVS

15 x 8.9 mm

$ 38.35

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4.92ctw White Topaz, Square, VS

4.92ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 37.73

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0.35ct Orange Spessartite Garnet, Oval, VS

0.35ct Orange Spessartite Garnet, Oval, VS

4.6 x 3.5 mm

$ 12.20

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17.46ct Green Uvarovite Garnet Drusy, Fancy, Opaque

17.46ct Green Uvarovite Garnet Drusy, Fancy, Opaque

18.2 x 18 mm

$ 56.81

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2.91ct Multicolor Labradorite, Baguette, Translucent

2.91ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 4.00

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29.75ct Brown Tiger'S Eye, Fancy, Opaque

29.75ct Brown Tiger'S Eye, Fancy, Opaque

40.9 x 9.5 mm

$ 2.97

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3.07ctw Yellow Citrine, Round, VVS

3.07ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 21.41

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11.60ct Pink Strawberry Quartz, Oval, Translucent

11.60ct Pink Strawberry Quartz, Oval, Translucent

16.9 x 12.9 mm

$ 86.30

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0.85ct Orange Hessonite Garnet, Pear Shape, VS

0.85ct Orange Hessonite Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 15.84

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1.43ct Multicolor Opal, Oval, Transparent

1.43ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 34.37

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2.89ct Violet Amethyst, Trillion, VS

2.89ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 17.27

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44.42ct Yellow Obsidian, Oval, Opaque

44.42ct Yellow Obsidian, Oval, Opaque

43.1 x 27.1 mm

$ 48.66

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27.91ct Multicolor Jasper, Oval, Opaque

27.91ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 16.82

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1.34ct Orange Hessonite Garnet, Cushion, VS-SI

1.34ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 22.02

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8.43ctw Yellow Rutile Quartz, Round, Translucent

8.43ctw Yellow Rutile Quartz, Round, Translucent

11 mm (calibrated)

$ 23.00

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1.05ct Yellow Color-Change Diaspore, Cushion, VS-SI

1.05ct Yellow Color-Change Diaspore, Cushion, VS-SI

8.9 x 5.4 mm

$ 42.84

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0.62ct Orange Sphalerite, Round, VS-SI

0.62ct Orange Sphalerite, Round, VS-SI

5 mm (calibrated)

$ 30.88

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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

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 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 -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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