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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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6.50ct Multicolor Quartz With Marcasite, Trillion, Transparent

6.50ct Multicolor Quartz With Marcasite, Trillion, Transparent

15 x 15 mm (calibrated)

$ 35.61

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18.83ct Blue Color-Change Fluorite, Oval, VS
Color-Change Fluorite Product Video (445414)

18.83ct Blue Color-Change Fluorite, Oval, VS

20 x 15 mm (calibrated)

$ 431.18

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11.34ct Brown Star Moonstone, Round, Translucent

11.34ct Brown Star Moonstone, Round, Translucent

13 mm (calibrated)

$ 37.65

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9.61ct Brown Smoky Quartz, Fancy, VVS

9.61ct Brown Smoky Quartz, Fancy, VVS

16.2 x 14 mm

$ 38.74

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12.38ct Green Actinolite Cat'S Eye, Oval, Translucent
Actinolite Cat's Eye Product Video (485809)

12.38ct Green Actinolite Cat'S Eye, Oval, Translucent

16.5 x 13.5 mm

$ 86.31

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30.59ctw Multicolor Coral, Cushion, Opaque

30.59ctw Multicolor Coral, Cushion, Opaque

18 x 13 mm (calibrated)

$ 57.98

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26.17ct Pink Smithsonite, Cushion, Transparent
Smithsonite Product Video (380713)

26.17ct Pink Smithsonite, Cushion, Transparent

15 x 15 mm (calibrated)

$ 772.41

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2.31ct Multicolor Spectrolite, Round, Opaque

2.31ct Multicolor Spectrolite, Round, Opaque

10 mm (calibrated)

$ 9.07

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1.01ct Multicolor Chocolate Opal, Oval, Translucent

1.01ct Multicolor Chocolate Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 33.20

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28.68ct Orange Moonstone, Round, Translucent
Moonstone Product Video (660339)

28.68ct Orange Moonstone, Round, Translucent

19 mm (calibrated)

$ 47.85

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2.98ct Red Zircon, Pear Shape, VVS-VS
Zircon Product Video (526527)

2.98ct Red Zircon, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 125.24

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45.38ct Gray Hematite, Marquise, Opaque

45.38ct Gray Hematite, Marquise, Opaque

30.4 x 13.5 mm

$ 44.26

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20.96ctw Brown Smoky Quartz, Marquise, Transparent
Smoky Quartz Product Video (619199)

20.96ctw Brown Smoky Quartz, Marquise, Transparent

19.7 x 12.5 mm

$ 87.96

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1.10ct Green Tsavorite Garnet, Oval, VS-SI
Tsavorite Garnet Product Video (715317)

1.10ct Green Tsavorite Garnet, Oval, VS-SI

7.4 x 5.5 mm

$ 438.24

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0.86ct Green Kornerupine, Oval, SI
Kornerupine Product Video (564801)

0.86ct Green Kornerupine, Oval, SI

5.5 x 4.6 mm

$ 295.31

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20.48ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (650671)

20.48ct Multicolor Pietersite, Oval, Opaque

28.2 x 19.6 mm

$ 39.95

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77.96ct Multicolor Jasper, Oval, Opaque
Jasper Product Video (693326)

77.96ct Multicolor Jasper, Oval, Opaque

45.7 x 25.6 mm

$ 45.04

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1.93ct Yellow Sphene, Pear Shape, VS
Sphene Product Video (381726)

1.93ct Yellow Sphene, Pear Shape, VS

9.4 x 6.8 mm

$ 159.05

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12.90ct Pink Strawberry Quartz, Pear Shape, Translucent

12.90ct Pink Strawberry Quartz, Pear Shape, Translucent

18.9 x 13.2 mm

$ 95.96

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47.70ct Black Obsidian, Cushion, Opaque

47.70ct Black Obsidian, Cushion, Opaque

30.6 x 24.1 mm

$ 52.26

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4.94ct Yellow Apatite, Baguette, VS
Apatite Product Video (438947)

4.94ct Yellow Apatite, Baguette, VS

12.5 x 7.4 mm

$ 254.38

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2.53ct Blue Kyanite, Round, SI

2.53ct Blue Kyanite, Round, SI

8 mm (calibrated)

$ 69.31

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1.11ct Pink Strawberry Quartz, Round, Translucent
Strawberry Quartz Product Video (533170)

1.11ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 7.23

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0.86ct Orange Sphalerite, Trillion, SI-I1

0.86ct Orange Sphalerite, Trillion, SI-I1

5.8 x 5.6 mm

$ 42.83

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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 navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate
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