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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
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Yellow Untreated Gemstones
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2.73ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (439100)

2.73ct Yellow Apatite, Emerald Cut, VS

8.6 x 8.5 mm

$ 140.58

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1.93ctw Red Pyrope Garnet, Oval, VVS-VS

1.93ctw Red Pyrope Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 16.73

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3.36ct Pink Tourmaline, Emerald Cut, SI

3.36ct Pink Tourmaline, Emerald Cut, SI

9.5 x 7.4 mm

$ 138.05

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19.11ct Brown Tiger'S Eye, Baguette, Opaque

19.11ct Brown Tiger'S Eye, Baguette, Opaque

20 x 15 mm (calibrated)

$ 19.03

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1.36ct Yellow Citrine, Cushion, Transparent

1.36ct Yellow Citrine, Cushion, Transparent

8 x 6 mm (calibrated)

$ 10.42

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5.41ct Multicolor Boulder Opal, Cushion, Opaque

5.41ct Multicolor Boulder Opal, Cushion, Opaque

14 x 10 mm (calibrated)

$ 26.94

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2.84ct Yellow Citrine, Oval, Transparent

2.84ct Yellow Citrine, Oval, Transparent

10 x 8 mm (calibrated)

$ 11.16

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8.23ctw Multicolor Pietersite, Oval, Opaque

8.23ctw Multicolor Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 36.06

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20.74ct Brown Tiger'S Eye, Oval, Opaque

20.74ct Brown Tiger'S Eye, Oval, Opaque

24.7 x 16.5 mm

$ 41.32

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1.20ct Pink Strawberry Quartz, Oval, Translucent

1.20ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 15.18

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0.52ct Violet Amethyst, Emerald Cut, VS

0.52ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 3.02

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23.01ct Multicolor Pietersite, Cushion, Opaque

23.01ct Multicolor Pietersite, Cushion, Opaque

27 x 20 mm (calibrated)

$ 53.85

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8.54ct Green Prehnite, Fancy, Transparent

8.54ct Green Prehnite, Fancy, Transparent

19.3 x 12.8 mm

$ 11.89

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0.63ct Green Tourmaline, Emerald Cut, VS

0.63ct Green Tourmaline, Emerald Cut, VS

10.1 x 3 mm

$ 17.19

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7.31ctw Yellow Citrine, Oval, VVS-VS

7.31ctw Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 50.96

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3.42ct Yellow Citrine, Oval, VVS

3.42ct Yellow Citrine, Oval, VVS

13.1 x 7.2 mm

$ 26.23

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8.38ctw Violet Amethyst, Oval, Transparent

8.38ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 45.91

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4.82ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

4.82ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 5 mm (calibrated)

$ 105.62

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2.03ct Orange Moonstone, Square, Translucent

2.03ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.07

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1.68ct Pink Tourmaline, Round, VS-SI
Tourmaline Product Video (747472)

1.68ct Pink Tourmaline, Round, VS-SI

7 mm (calibrated)

$ 250.99

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0.72ct Green Peridot, Oval, VVS-VS

0.72ct Green Peridot, Oval, VVS-VS

6.9 x 4.8 mm

$ 5.02

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4.40ct Green Prehnite, Pear Shape, Transparent/Translucent

4.40ct Green Prehnite, Pear Shape, Transparent/Translucent

12.1 x 8.4 mm

$ 9.64

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19.94ct Brown Tiger'S Eye, Fancy, Opaque

19.94ct Brown Tiger'S Eye, Fancy, Opaque

35.7 x 8.1 mm

$ 10.92

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3.38ct Pink Strawberry Quartz, Oval, Transparent

3.38ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 25.35

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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

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

It was easy to navigate

Posted By GemGod in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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