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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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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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9.40ct Multicolor Quartz With Marcasite, Oval, Transparent

9.40ct Multicolor Quartz With Marcasite, Oval, Transparent

16.4 x 12.6 mm

$ 61.79

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2.57ct White Rainbow Moonstone, Oval, Transparent

2.57ct White Rainbow Moonstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 84.50

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13.63ct Green Maw-Sit-Sit, Oval, Opaque

13.63ct Green Maw-Sit-Sit, Oval, Opaque

15.6 x 12.9 mm

$ 44.80

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195.94ct Multicolor Rhodochrosite, Fancy, Opaque
Rhodochrosite Product Video (471434)

195.94ct Multicolor Rhodochrosite, Fancy, Opaque

50 x 28.4 mm

$ 178.18

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0.16ctw White Diamond, Round, VVS-VS

0.16ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 260.04

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1.41ct Orange Zircon, Emerald Cut, VVS

1.41ct Orange Zircon, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 23.17

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0.92ct Yellow Sphene, Oval, Transparent

0.92ct Yellow Sphene, Oval, Transparent

5.8 x 5.3 mm

$ 4.58

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29.36ct Green Bloodstone, Pear Shape, Opaque

29.36ct Green Bloodstone, Pear Shape, Opaque

23.1 x 18 mm

$ 43.87

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18.54ct Black Tourmaline, Emerald Cut, Opaque

18.54ct Black Tourmaline, Emerald Cut, Opaque

26.6 x 9.6 mm

$ 92.33

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24.18ct Gray Hematite, Marquise, Opaque

24.18ct Gray Hematite, Marquise, Opaque

28.3 x 12.6 mm

$ 23.57

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0.85ct Brown Smoky Quartz, Baguette, VVS

0.85ct Brown Smoky Quartz, Baguette, VVS

6.5 x 5.5 mm

$ 5.93

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6.79ct Turquoise Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439516)

6.79ct Turquoise Hemimorphite Druzy, Fancy, Opaque

14.1 x 11.5 mm

$ 111.59

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2.57ct Green Tourmaline, Emerald Cut, VVS-VS

2.57ct Green Tourmaline, Emerald Cut, VVS-VS

19.2 x 4.1 mm

$ 70.40

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13.68ct Brown Tiger'S Eye, Pear Shape, Opaque

13.68ct Brown Tiger'S Eye, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 13.63

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3.70ctw Orange Hessonite Garnet, Emerald Cut, VS
Hessonite Garnet Product Video (392145)

3.70ctw Orange Hessonite Garnet, Emerald Cut, VS

6.5 x 4.8 mm

$ 81.07

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3.20ct Yellow Citrine, Oval, VVS-VS

3.20ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 25.49

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1.60ct Yellow Beryl, Round, VVS-VS

1.60ct Yellow Beryl, Round, VVS-VS

8 mm (calibrated)

$ 31.87

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11.84ct Multicolor Labradorite, Oval, Translucent

11.84ct Multicolor Labradorite, Oval, Translucent

18 x 13 mm (calibrated)

$ 25.95

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0.58ct Orange Sphalerite, Oval, SI

0.58ct Orange Sphalerite, Oval, SI

5.2 x 4.4 mm

$ 28.88

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2.05ctw Green Peridot, Round, VVS-VS

2.05ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 33.70

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1.78ct Orange Moonstone, Cushion, Translucent

1.78ct Orange Moonstone, Cushion, Translucent

7 x 7 mm (calibrated)

$ 3.57

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2.50ct Yellow Sphene, Oval, Transparent

2.50ct Yellow Sphene, Oval, Transparent

9 x 7 mm (calibrated)

$ 12.45

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2.66ct Green Tourmaline, Emerald Cut, VS

2.66ct Green Tourmaline, Emerald Cut, VS

20.1 x 4.1 mm

$ 72.86

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4.41ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (381950)

4.41ctw Multicolor Andalusite, Round, VS

4 mm (calibrated)

$ 193.71

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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

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

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 -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

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 -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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