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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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6.23ct Yellow Citrine, Oval, VVS

6.23ct Yellow Citrine, Oval, VVS

13.5 x 10.4 mm

$ 47.77

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0.93ct Pink Malaya Garnet, Round, VS

0.93ct Pink Malaya Garnet, Round, VS

6 mm (calibrated)

$ 40.75

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11.20ct Multicolor Dendritic Agate, Oval, Translucent

11.20ct Multicolor Dendritic Agate, Oval, Translucent

22.4 x 16 mm

$ 5.58

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7.81ct Multicolor Agate, Oval, Opaque

7.81ct Multicolor Agate, Oval, Opaque

13.2 x 11.7 mm

$ 7.78

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2.14ct Violet Amethyst, Trillion, VVS-VS

2.14ct Violet Amethyst, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 16.42

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1.69ct Yellow Citrine, Baguette, VVS-VS

1.69ct Yellow Citrine, Baguette, VVS-VS

9.7 x 4.9 mm

$ 12.96

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4.17ct Brown Tiger'S Eye, Oval, Opaque

4.17ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 2.45

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1.73ct Yellow Sillimanite, Oval, VVS-VS
Sillimanite Product Video (411763)

1.73ct Yellow Sillimanite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 66.34

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2.08ct Orange Hessonite Garnet, Cushion, VS-SI

2.08ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 33.71

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2.72ct Brown Hessonite Garnet, Oval, VS-SI

2.72ct Brown Hessonite Garnet, Oval, VS-SI

9.3 x 7.7 mm

$ 49.65

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23.91ct Green Jadeite, Fancy, Translucent

23.91ct Green Jadeite, Fancy, Translucent

29.1 x 14.3 mm

$ 14.14

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0.18ctw White Diamond, Round, VVS-VS

0.18ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 327.04

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5.87ct Pink Kunzite, Emerald Cut, VVS-VS

5.87ct Pink Kunzite, Emerald Cut, VVS-VS

10.6 x 7.8 mm

$ 146.16

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5.85ct Violet Amethyst, Pear Shape, VVS-VS

5.85ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 44.87

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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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34.61ct Green Aventurine, Fancy, Opaque

34.61ct Green Aventurine, Fancy, Opaque

36.5 x 11 mm

$ 2.87

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0.09ct White Diamond, Marquise, VVS
Diamond Product Video (740682)

0.09ct White Diamond, Marquise, VVS

4 x 2 mm (calibrated)

$ 312.80

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2.43ct Purple Rhodolite Garnet, Oval, VVS-VS

2.43ct Purple Rhodolite Garnet, Oval, VVS-VS

9 x 7.4 mm

$ 65.15

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2.78ctw Violet Amethyst, Trillion, VS

2.78ctw Violet Amethyst, Trillion, VS

6.8 x 6.1 mm

$ 18.28

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0.55ct Green Peridot, Emerald Cut, VVS

0.55ct Green Peridot, Emerald Cut, VVS

6 x 4 mm (calibrated)

$ 8.22

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1.16ct Green Sphene, Oval, Transparent

1.16ct Green Sphene, Oval, Transparent

7.6 x 5.9 mm

$ 5.78

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0.95ct Blue Kyanite, Oval, SI

0.95ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 23.66

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0.73ctw Blue Kyanite, Round, VS-SI

0.73ctw Blue Kyanite, Round, VS-SI

4.2 mm

$ 18.18

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21.90ct Gray Hematite, Emerald Cut, Opaque

21.90ct Gray Hematite, Emerald Cut, Opaque

19.9 x 13.9 mm

$ 24.00

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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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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