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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

Size Explained

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
Purple Untreated Gemstones
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Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
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Lots
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0.14ct Black Diamond, Square, Opaque

0.14ct Black Diamond, Square, Opaque

2.6 x 2.4 mm

$ 69.72

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1.05ct Yellow Morganite, Cushion, VS

1.05ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 63.28

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3.88ct Turquoise Fluorite, Marquise, Transparent

3.88ct Turquoise Fluorite, Marquise, Transparent

13.6 x 7.8 mm

$ 15.95

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44.10ct Multicolor Quartz With Marcasite, Fancy, Transparent
Quartz With Marcasite Product Video (586699)

44.10ct Multicolor Quartz With Marcasite, Fancy, Transparent

35.1 x 23.7 mm

$ 241.58

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6.13ct Violet Amethyst, Marquise, VS

6.13ct Violet Amethyst, Marquise, VS

17.6 x 9.1 mm

$ 39.18

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4.13ct Brown Moonstone, Flower Cut, Translucent

4.13ct Brown Moonstone, Flower Cut, Translucent

13 x 13 mm (calibrated)

$ 18.09

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1.61ct Yellow Sillimanite, Oval, VS

1.61ct Yellow Sillimanite, Oval, VS

8 x 6 mm (calibrated)

$ 51.45

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23.21ctw Multicolor Pietersite, Fancy, Opaque

23.21ctw Multicolor Pietersite, Fancy, Opaque

31.2 x 18.6 mm

$ 87.61

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5.89ct Brown Cat'S Eye Opal, Oval, Translucent

5.89ct Brown Cat'S Eye Opal, Oval, Translucent

13.7 x 10.5 mm

$ 32.27

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24.23ctw Brown Tiger'S Eye, Baguette, Opaque

24.23ctw Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 26.54

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1.19ct Pink Malaya Garnet, Round, VS

1.19ct Pink Malaya Garnet, Round, VS

6 mm (calibrated)

$ 55.42

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6.29ct Orange Imperial Topaz, Cushion, VVS
Imperial Topaz Product Video (384489)

6.29ct Orange Imperial Topaz, Cushion, VVS

13.7 x 8.3 mm

$ 2,923.59

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76.69ct Pink Rose Quartz, Pear Shape, Transparent
Rose Quartz Product Video (521014)

76.69ct Pink Rose Quartz, Pear Shape, Transparent

34.6 x 24.6 mm

$ 168.04

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8.04ct Brown Moonstone, Flower Cut, Translucent

8.04ct Brown Moonstone, Flower Cut, Translucent

15 x 15 mm (calibrated)

$ 35.24

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3.03ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (396085)

3.03ct Yellow Apatite, Emerald Cut, VS

7.7 x 7.6 mm

$ 123.32

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65.37ct Multicolor Jasper, Cushion, Opaque

65.37ct Multicolor Jasper, Cushion, Opaque

36 x 29.1 mm

$ 55.14

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0.67ct Green Peridot, Square, VVS-VS
Peridot Product Video (527303)

0.67ct Green Peridot, Square, VVS-VS

5 x 5 mm (calibrated)

$ 9.20

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7.18ct Turquoise Grandidierite, Pear Shape, Translucent
Grandidierite Product Video (472004)

7.18ct Turquoise Grandidierite, Pear Shape, Translucent

14 x 11.4 mm

$ 1,573.28

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9.99ct Yellow Apatite, Cushion, VVS-VS
Apatite Product Video (398362)

9.99ct Yellow Apatite, Cushion, VVS-VS

17.1 x 10.5 mm

$ 473.71

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47.89ct Gray Hematite, Oval, Opaque

47.89ct Gray Hematite, Oval, Opaque

23.6 x 18.7 mm

$ 46.70

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143.91ct Multicolor Rhodochrosite, Fancy, Opaque
Rhodochrosite Product Video (471437)

143.91ct Multicolor Rhodochrosite, Fancy, Opaque

43.7 x 25.5 mm

$ 132.70

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27.29ct White Rainbow Moonstone, Baguette, Transparent
Rainbow Moonstone Product Video (668805)

27.29ct White Rainbow Moonstone, Baguette, Transparent

28.9 x 12 mm

$ 489.25

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37.39ct Multicolor Jasper, Oval, Opaque

37.39ct Multicolor Jasper, Oval, Opaque

35.4 x 25.7 mm

$ 22.53

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4.31ctw Orange Hessonite Garnet, Square, VS
Hessonite Garnet Product Video (392993)

4.31ctw Orange Hessonite Garnet, Square, VS

6.9 x 6.7 mm

$ 94.44

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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

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate
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