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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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Brown Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
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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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27.23ct Multicolor Amethyst Geode Slice, Fancy, Transparent

27.23ct Multicolor Amethyst Geode Slice, Fancy, Transparent

27 x 20 mm (calibrated)

$ 29.03

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5.04ct Orange Sphalerite, Emerald Cut, SI-I1
Sphalerite Product Video (690765)

5.04ct Orange Sphalerite, Emerald Cut, SI-I1

11 x 7.4 mm

$ 250.99

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11.09ct Multicolor Coral, Round, Translucent

11.09ct Multicolor Coral, Round, Translucent

17 mm (calibrated)

$ 24.30

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21.39ct Multicolor Boulder Opal, Cushion, Opaque
Boulder Opal Product Video (626298)

21.39ct Multicolor Boulder Opal, Cushion, Opaque

16 x 16 mm (calibrated)

$ 164.04

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33.71ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (523722)

33.71ct Multicolor Boulder Opal, Fancy, Opaque

32.6 x 22.1 mm

$ 184.67

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10.05ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (503395)

10.05ct Blue Aquamarine, Emerald Cut, VVS

17.2 x 9 mm

$ 1,981.94

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68.84ct Green Malachite, Square, Opaque
Malachite Product Video (669074)

68.84ct Green Malachite, Square, Opaque

25 x 24.3 mm

$ 68.57

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34.44ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

34.44ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

36.2 x 25 mm

$ 16.29

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1.55ct Purple Spinel, Cushion, VS

1.55ct Purple Spinel, Cushion, VS

6.6 x 6.2 mm

$ 110.39

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43.68ct Multicolor Jasper, Oval, Opaque
Jasper Product Video (349030)

43.68ct Multicolor Jasper, Oval, Opaque

34.3 x 24.2 mm

$ 39.88

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0.60ct Green Demantoid Garnet, Oval, VS

0.60ct Green Demantoid Garnet, Oval, VS

6 x 4.2 mm

$ 164.34

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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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19.41ct Blue Chalcedony, Pear Shape, Opaque

19.41ct Blue Chalcedony, Pear Shape, Opaque

32.1 x 16.6 mm

$ 48.34

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2.29ct Black Cat'S Eye Scapolite, Round, Translucent

2.29ct Black Cat'S Eye Scapolite, Round, Translucent

8 mm (calibrated)

$ 12.55

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0.16ctw White Diamond, Round, VVS-VS

0.16ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 242.24

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7.22ct Brown Smoky Quartz, Marquise, VS
Smoky Quartz Product Video (601420)

7.22ct Brown Smoky Quartz, Marquise, VS

17.1 x 12 mm

$ 29.12

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2.36ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.36ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.5 x 5.1 mm

$ 9.35

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2.85ct Yellow Golden Beryl, Round, VVS

2.85ct Yellow Golden Beryl, Round, VVS

10 mm (calibrated)

$ 62.45

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1.56ct Green Sphene, Pear Shape, VS-SI
Sphene Product Video (467956)

1.56ct Green Sphene, Pear Shape, VS-SI

7.9 x 6.6 mm

$ 76.91

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8.98ct Yellow Star Moonstone, Oval, Opaque

8.98ct Yellow Star Moonstone, Oval, Opaque

13 x 11 mm (calibrated)

$ 39.35

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17.33ct Turquoise Grandidierite, Pear Shape, SI
Grandidierite Product Video (470657)

17.33ct Turquoise Grandidierite, Pear Shape, SI

17.6 x 16.4 mm

$ 7,911.15

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7.65ct Blue Aquamarine, Emerald Cut, VS
Aquamarine Product Video (415530)

7.65ct Blue Aquamarine, Emerald Cut, VS

16 x 8.4 mm

$ 1,523.88

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20.64ct Blue Chalcedony, Marquise, Opaque

20.64ct Blue Chalcedony, Marquise, Opaque

32.4 x 15.7 mm

$ 51.39

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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 -> 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 -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

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
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