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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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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Violet Untreated Gemstones
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Yellow Untreated Gemstones
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6.48ct Green Idocrase, Pear Shape, VS
Idocrase Product Video (502119)

6.48ct Green Idocrase, Pear Shape, VS

12.9 x 9.9 mm

$ 606.12

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9.76ct Brown Smoky Quartz, Marquise, VS

9.76ct Brown Smoky Quartz, Marquise, VS

18.9 x 13 mm

$ 26.73

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0.49ct Green Demantoid Garnet, Oval, VS-SI

0.49ct Green Demantoid Garnet, Oval, VS-SI

5.1 x 4.1 mm

$ 134.21

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1.81ct Brown Diamond, Round, SI
Diamond Product Video (378645)

1.81ct Brown Diamond, Round, SI

7.5 mm (calibrated)

$ 4,687.18

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50.61ct Blue Larimar, Fancy, Opaque
Larimar Product Video (492449)

50.61ct Blue Larimar, Fancy, Opaque

30.1 x 26 mm

$ 499.06

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41.79ct Multicolor Jasper, Fancy, Translucent

41.79ct Multicolor Jasper, Fancy, Translucent

41.8 x 25 mm

$ 32.97

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9.24ct Pink Strawberry Quartz, Oval, Translucent

9.24ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 58.11

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1.71ct Pink Malaya Garnet, Marquise, VS-SI

1.71ct Pink Malaya Garnet, Marquise, VS-SI

10.8 x 5.4 mm

$ 59.61

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9.00ct Yellow Apatite, Oval, VS
Apatite Product Video (407297)

9.00ct Yellow Apatite, Oval, VS

16.4 x 11.1 mm

$ 408.91

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10.12ct Purple Kunzite, Oval, VS
Kunzite Product Video (409936)

10.12ct Purple Kunzite, Oval, VS

17.7 x 10.1 mm

$ 286.61

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8.20ct Yellow Apatite, Oval, VS-SI
Apatite Product Video (407296)

8.20ct Yellow Apatite, Oval, VS-SI

15.2 x 11.5 mm

$ 372.56

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11.13ct Yellow Rutile Quartz, Oval, Transparent

11.13ct Yellow Rutile Quartz, Oval, Transparent

21.8 x 12 mm

$ 39.14

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13.92ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (382104)

13.92ct Yellow Apatite, Emerald Cut, VS

13.2 x 15.6 mm

$ 981.10

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8.10ct Gray Quartz Cat'S Eye, Oval, Opaque

8.10ct Gray Quartz Cat'S Eye, Oval, Opaque

12.5 x 10 mm

$ 26.63

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2.70ct Pink Tourmaline, Emerald Cut, VS-SI

2.70ct Pink Tourmaline, Emerald Cut, VS-SI

9.4 x 6.1 mm

$ 170.09

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73.44ct Multicolor Agate, Oval, Opaque

73.44ct Multicolor Agate, Oval, Opaque

25.4 x 25 mm

$ 36.57

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43.76ct Multicolor Jasper, Oval, Opaque

43.76ct Multicolor Jasper, Oval, Opaque

33.2 x 24.7 mm

$ 44.59

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34.92ct Pink Rose Quartz, Cushion, Transparent
Rose Quartz Product Video (355080)

34.92ct Pink Rose Quartz, Cushion, Transparent

23.7 x 17.6 mm

$ 76.51

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9.84ct Blue Larimar, Oval, Opaque

9.84ct Blue Larimar, Oval, Opaque

16 x 12 mm (calibrated)

$ 97.03

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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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22.63ct Black Obsidian, Baguette, Opaque

22.63ct Black Obsidian, Baguette, Opaque

31.5 x 14.1 mm

$ 11.27

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18.42ct Brown Moonstone, Fancy, Translucent
Moonstone Product Video (582246)

18.42ct Brown Moonstone, Fancy, Translucent

24.7 x 16.5 mm

$ 110.19

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28.61ctw Multicolor Fossil Coral, Trillion, Opaque

28.61ctw Multicolor Fossil Coral, Trillion, Opaque

25 x 18 mm (calibrated)

$ 62.69

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23.46ct Violet Amethyst, Round, VVS
Amethyst Product Video (692709)

23.46ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 136.30

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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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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