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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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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.33ctw Pink Morganite, Oval, VVS-VS

2.33ctw Pink Morganite, Oval, VVS-VS

6 x 6 mm (calibrated)

$ 127.64

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14.93ctw Brown Tiger'S Eye, Baguette, Opaque

14.93ctw Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 16.35

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11.46ct Yellow Apatite, Oval, VS
Apatite Product Video (614758)

11.46ct Yellow Apatite, Oval, VS

16 x 12 mm (calibrated)

$ 520.69

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4.17ct White Morganite, Oval, Transparent

4.17ct White Morganite, Oval, Transparent

14.3 x 10.4 mm

$ 47.92

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8.28ct Blue Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439473)

8.28ct Blue Hemimorphite Druzy, Fancy, Opaque

13 x 13 mm (calibrated)

$ 123.70

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39.03ct Multicolor Jasper, Pear Shape, Opaque

39.03ct Multicolor Jasper, Pear Shape, Opaque

33.5 x 33.2 mm

$ 64.13

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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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2.37ctw Multicolor Andalusite, Round, VS-SI

2.37ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 116.85

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1.17ct Purple Spinel, Pear Shape, VS-SI

1.17ct Purple Spinel, Pear Shape, VS-SI

7.5 x 5.9 mm

$ 134.60

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21.16ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (678766)

21.16ct Multicolor Boulder Opal, Fancy, Opaque

25.6 x 16.9 mm

$ 105.38

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29.23ctw Multicolor Fossil Coral, Fancy, Opaque
Fossil Coral Product Video (514331)

29.23ctw Multicolor Fossil Coral, Fancy, Opaque

21.7 x 14.7 mm

$ 63.41

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108.15ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (522443)

108.15ct Pink Rose Quartz, Oval, Transparent

37.9 x 26.2 mm

$ 236.98

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13.71ct Yellow Apatite, Cushion, VS
Apatite Product Video (407302)

13.71ct Yellow Apatite, Cushion, VS

14.9 x 14 mm

$ 566.28

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30.47ct Brown Moonstone, Fancy, Opaque

30.47ct Brown Moonstone, Fancy, Opaque

25 x 18 mm (calibrated)

$ 35.05

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7.57ct Pink Strawberry Quartz, Oval, Translucent

7.57ct Pink Strawberry Quartz, Oval, Translucent

12.9 x 10.1 mm

$ 45.62

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1.42ct White Sillimanite Cat'S Eye, Oval, Transparent

1.42ct White Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 6.4 mm

$ 5.66

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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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57.73ct Multicolor Jasper, Oval, Opaque
Jasper Product Video (623881)

57.73ct Multicolor Jasper, Oval, Opaque

39.3 x 27.4 mm

$ 58.82

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3.81ct Multicolor Fire Agate, Fancy, Opaque

3.81ct Multicolor Fire Agate, Fancy, Opaque

11.6 x 9.1 mm

$ 53.68

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13.54ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450374)

13.54ct Blue Aquamarine, Emerald Cut, VVS

19.3 x 9.7 mm

$ 3,708.61

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1.58ct Purple Spinel, Marquise, VS
Spinel Product Video (369307)

1.58ct Purple Spinel, Marquise, VS

10.6 x 5.8 mm

$ 93.57

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0.90ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.90ct Yellow Color-Change Diaspore, Emerald Cut, VS

8.7 x 4.1 mm

$ 39.59

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2.55ct Orange Hessonite Garnet, Emerald Cut, SI

2.55ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 35.06

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9.90ct Multicolor Rainbow Pyrite, Fancy, Opaque

9.90ct Multicolor Rainbow Pyrite, Fancy, Opaque

18.4 x 13.8 mm

$ 34.81

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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

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate
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