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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Yellow Untreated Gemstones
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2.68ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.68ctw White Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 6.2 mm

$ 8.90

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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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23.63ct Turquoise Hiddenite, Cushion, VS-SI
Hiddenite Product Video (706348)

23.63ct Turquoise Hiddenite, Cushion, VS-SI

19.6 x 12.9 mm

$ 586.50

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64.36ctw Multicolor Labradorite, Round, Translucent
Labradorite Product Video (712049)

64.36ctw Multicolor Labradorite, Round, Translucent

25.4 mm

$ 118.59

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2.27ct Orange Sphalerite, Round, SI-I1

2.27ct Orange Sphalerite, Round, SI-I1

7.5 mm (calibrated)

$ 113.05

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28.62ct Orange Moonstone, Round, Opaque

28.62ct Orange Moonstone, Round, Opaque

19 mm (calibrated)

$ 47.51

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0.47ct Green Demantoid Garnet, Oval, VVS-VS
Demantoid Garnet Product Video (276496)

0.47ct Green Demantoid Garnet, Oval, VVS-VS

5.7 x 3.8 mm

$ 128.73

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0.74ct Brown Color-Change Garnet, Oval, VS

0.74ct Brown Color-Change Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 81.07

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23.85ct Blue Chalcedony, Cushion, Opaque

23.85ct Blue Chalcedony, Cushion, Opaque

24.4 x 18.9 mm

$ 59.39

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2.51ct Yellow Golden Beryl, Oval, VVS

2.51ct Yellow Golden Beryl, Oval, VVS

10 x 8 mm (calibrated)

$ 68.76

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2.50ct Orange Hessonite Garnet, Emerald Cut, SI
Hessonite Garnet Product Video (547772)

2.50ct Orange Hessonite Garnet, Emerald Cut, SI

7 x 7 mm (calibrated)

$ 42.05

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0.14ctw White Diamond, Round, VVS-VS

0.14ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 254.36

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29.76ct Multicolor Obsidian, Oval, Opaque

29.76ct Multicolor Obsidian, Oval, Opaque

30 x 22 mm (calibrated)

$ 25.11

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1.39ct Green Chrysoberyl, Pear Shape, VVS-VS
Chrysoberyl Product Video (366486)

1.39ct Green Chrysoberyl, Pear Shape, VVS-VS

8.6 x 5.9 mm

$ 161.99

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80.06ct Multicolor Jasper, Pear Shape, Opaque

80.06ct Multicolor Jasper, Pear Shape, Opaque

43.8 x 20.3 mm

$ 49.11

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46.56ctw Gray Hematite, Heart, Opaque
Hematite Product Video (342504)

46.56ctw Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 77.29

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7.22ct Brown Smoky Quartz, Marquise, VS

7.22ct Brown Smoky Quartz, Marquise, VS

17.1 x 12 mm

$ 29.12

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0.61ct Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (276515)

0.61ct Green Demantoid Garnet, Oval, VS

6 x 4 mm (calibrated)

$ 139.23

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22.62ctw Multicolor Pietersite, Oval, Opaque

22.62ctw Multicolor Pietersite, Oval, Opaque

21 x 15.6 mm

$ 90.79

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6.08ct Green Idocrase, Oval, VS
Idocrase Product Video (503095)

6.08ct Green Idocrase, Oval, VS

15 x 10 mm (calibrated)

$ 682.45

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13.13ct Bi-Color Tourmaline, Emerald Cut, SI
Tourmaline Product Video (402789)

13.13ct Bi-Color Tourmaline, Emerald Cut, SI

12.3 x 11.5 mm

$ 1,750.89

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14.38ct White Howlite, Pear Shape, Opaque

14.38ct White Howlite, Pear Shape, Opaque

23.2 x 16.4 mm

$ 6.73

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1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS
Chrysoberyl Product Video (366561)

1.13ct Yellow Chrysoberyl, Pear Shape, VVS-VS

8.2 x 5.6 mm

$ 131.69

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10.80ct Orange Star Moonstone, Oval, Translucent

10.80ct Orange Star Moonstone, Oval, Translucent

13 x 11 mm (calibrated)

$ 43.03

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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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. 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 -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

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