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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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Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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11.77ct Multicolor Agate, Oval, Opaque

11.77ct Multicolor Agate, Oval, Opaque

18.2 x 15.6 mm

$ 18.63

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0.84ct Green Peridot, Oval, VS

0.84ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.86

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1.49ct Red Pyrope Garnet, Fancy, VS

1.49ct Red Pyrope Garnet, Fancy, VS

9.1 x 3.5 mm

$ 17.84

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3.88ct Violet Amethyst, Pear Shape, VVS

3.88ct Violet Amethyst, Pear Shape, VVS

13.9 x 9.6 mm

$ 28.18

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3.93ctw Orange Moonstone, Trillion, Translucent

3.93ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.83

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16.35ct White Howlite, Oval, Opaque

16.35ct White Howlite, Oval, Opaque

25 x 18 mm (calibrated)

$ 6.79

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2.10ct Pink Kunzite, Emerald Cut, VVS

2.10ct Pink Kunzite, Emerald Cut, VVS

7 x 7 mm (calibrated)

$ 57.78

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22.13ct Gray Hematite, Baguette, Opaque

22.13ct Gray Hematite, Baguette, Opaque

19.8 x 13.1 mm

$ 20.37

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1.15ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.15ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7.7 x 5.3 mm

$ 46.92

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5.42ctw Yellow Citrine, Oval, VVS-VS

5.42ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 29.69

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2.44ct Yellow Citrine, Oval, VVS-VS

2.44ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 17.02

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14.18ctw Green Malachite, Baguette, Opaque

14.18ctw Green Malachite, Baguette, Opaque

11 x 9 mm (calibrated)

$ 15.30

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25.34ct Green Opal, Cushion, Opaque

25.34ct Green Opal, Cushion, Opaque

22.6 x 18.5 mm

$ 54.27

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4.97ct Green Tourmaline, Flower Cut, Translucent
Tourmaline Product Video (475311)

4.97ct Green Tourmaline, Flower Cut, Translucent

15.7 x 9.3 mm

$ 54.45

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1.37ct Purple Rhodolite Garnet, Oval, VS

1.37ct Purple Rhodolite Garnet, Oval, VS

6.9 x 5.9 mm

$ 41.67

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16.74ct Multicolor Jasper, Pear Shape, Opaque

16.74ct Multicolor Jasper, Pear Shape, Opaque

22.5 x 17.8 mm

$ 10.45

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52.11ct Green Uvarovite Garnet Drusy, Fancy, Opaque

52.11ct Green Uvarovite Garnet Drusy, Fancy, Opaque

35.2 x 23.9 mm

$ 77.85

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3.42ct Yellow Citrine, Oval, VS

3.42ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 21.36

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14.95ct Multicolor Jasper, Fancy, Opaque

14.95ct Multicolor Jasper, Fancy, Opaque

20.5 x 18 mm

$ 11.79

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14.46ct White Howlite, Pear Shape, Opaque

14.46ct White Howlite, Pear Shape, Opaque

23.7 x 18 mm

$ 7.20

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0.86ct Green Tourmaline, Emerald Cut, VS

0.86ct Green Tourmaline, Emerald Cut, VS

8.4 x 3.9 mm

$ 42.83

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7.12ct Yellow Rutile Quartz, Round, Translucent

7.12ct Yellow Rutile Quartz, Round, Translucent

13 mm (calibrated)

$ 19.36

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0.93ct Orange Hessonite Garnet, Pear Shape, VS-SI

0.93ct Orange Hessonite Garnet, Pear Shape, VS-SI

7.7 x 5.6 mm

$ 20.38

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1.81ct Orange Sphalerite, Emerald Cut, SI

1.81ct Orange Sphalerite, Emerald Cut, SI

7.1 x 5.2 mm

$ 108.17

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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

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 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

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate
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