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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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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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25.50ct Green Aventurine, Fancy, Opaque

25.50ct Green Aventurine, Fancy, Opaque

36.1 x 10.3 mm

$ 2.12

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24.69ct Green Aventurine, Oval, Translucent

24.69ct Green Aventurine, Oval, Translucent

28.4 x 20.2 mm

$ 24.59

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1.53ct Yellow Beryl, Round, VS

1.53ct Yellow Beryl, Round, VS

8 mm (calibrated)

$ 30.48

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9.48ct Black Tourmaline, Emerald Cut, Opaque

9.48ct Black Tourmaline, Emerald Cut, Opaque

14.5 x 9.4 mm

$ 47.21

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11.77ct White Rainbow Moonstone, Oval, Transparent

11.77ct White Rainbow Moonstone, Oval, Transparent

22.3 x 11.5 mm

$ 93.78

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1.63ct Yellow Citrine, Emerald Cut, VVS-VS

1.63ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 10.18

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36.70ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

36.70ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

15 mm (calibrated)

$ 80.42

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11.84ct Brown Smoky Quartz, Round, VVS

11.84ct Brown Smoky Quartz, Round, VVS

16 mm (calibrated)

$ 19.46

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1.20ct Brown Rutile Topaz, Marquise, Transparent

1.20ct Brown Rutile Topaz, Marquise, Transparent

12.4 x 4.5 mm

$ 24.90

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26.67ct Multicolor Jasper, Oval, Opaque

26.67ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 27.17

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0.97ct Yellow Color-Change Diaspore, Pear Shape, VVS

0.97ct Yellow Color-Change Diaspore, Pear Shape, VVS

9.3 x 4.2 mm

$ 51.20

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2.15ct Yellow Citrine, Oval, VVS-VS

2.15ct Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 17.26

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5.62ctw Multicolor Opal, Square, Transparent

5.62ctw Multicolor Opal, Square, Transparent

4.7 x 4.6 mm

$ 39.90

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26.36ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

26.36ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

20.7 x 17.2 mm

$ 26.25

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2.01ct Violet Amethyst, Square, VS

2.01ct Violet Amethyst, Square, VS

8 x 8 mm (calibrated)

$ 16.02

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1.49ct Yellow Citrine, Emerald Cut, VVS-VS

1.49ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 9.79

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9.08ct White Rainbow Moonstone, Pear Shape, Transparent

9.08ct White Rainbow Moonstone, Pear Shape, Transparent

16.3 x 13.1 mm

$ 72.35

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1.08ct Green Tourmaline, Emerald Cut, VS

1.08ct Green Tourmaline, Emerald Cut, VS

14.3 x 3.2 mm

$ 22.83

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9.37ct Multicolor Boulder Opal, Pear Shape, Opaque

9.37ct Multicolor Boulder Opal, Pear Shape, Opaque

24.7 x 11.8 mm

$ 38.89

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2.08ct Orange Hessonite Garnet, Oval, VS-SI

2.08ct Orange Hessonite Garnet, Oval, VS-SI

8.6 x 7.1 mm

$ 37.96

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0.93ct Green Tourmaline, Emerald Cut, VVS

0.93ct Green Tourmaline, Emerald Cut, VVS

17.1 x 2.8 mm

$ 25.48

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2.36ct Orange Hessonite Garnet, Emerald Cut, VS
Hessonite Garnet Product Video (553501)

2.36ct Orange Hessonite Garnet, Emerald Cut, VS

8.6 x 6.7 mm

$ 44.26

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5.52ctw Pink Strawberry Quartz, Round, Translucent

5.52ctw Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 34.17

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4.01ct Yellow Citrine, Oval, VVS

4.01ct Yellow Citrine, Oval, VVS

12 x 10 mm (calibrated)

$ 30.76

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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

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 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
→ View All GemSelect Reviews on Bizrate
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