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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
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1.75ct Orange Sunstone, Round, Translucent

1.75ct Orange Sunstone, Round, Translucent

8.5 mm (calibrated)

$ 10.47

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1.38ct Purple Spinel, Cushion, VVS

1.38ct Purple Spinel, Cushion, VVS

7.3 x 6.2 mm

$ 137.45

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16.51ct Green Opal, Oval, Opaque

16.51ct Green Opal, Oval, Opaque

19.6 x 16.1 mm

$ 35.36

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3.41ct Green Apatite, Emerald Cut, VS

3.41ct Green Apatite, Emerald Cut, VS

9 x 9 mm (calibrated)

$ 178.95

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26.40ct Multicolor Jasper, Oval, Opaque

26.40ct Multicolor Jasper, Oval, Opaque

44.1 x 13.1 mm

$ 22.27

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3.72ct Yellow Citrine, Oval, VS-SI

3.72ct Yellow Citrine, Oval, VS-SI

12.3 x 8.5 mm

$ 20.38

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2.08ct Green Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (744415)

2.08ct Green Tourmaline, Emerald Cut, VVS-VS

7.7 x 6.6 mm

$ 241.70

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41.78ct Gray Obsidian, Oval, Opaque

41.78ct Gray Obsidian, Oval, Opaque

35.9 x 24.4 mm

$ 32.96

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8.31ctw Pink Strawberry Quartz, Oval, Transparent

8.31ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 127.45

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23.58ct Gray Hematite, Heart, Opaque
Hematite Product Video (322580)

23.58ct Gray Hematite, Heart, Opaque

20.4 x 19.1 mm

$ 51.68

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0.50ct White Rainbow Moonstone, Baguette, Transparent

0.50ct White Rainbow Moonstone, Baguette, Transparent

6 x 4 mm (calibrated)

$ 17.43

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34.23ct Multicolor Jasper, Cushion, Opaque

34.23ct Multicolor Jasper, Cushion, Opaque

29.6 x 21 mm

$ 18.76

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10.37ctw Brown Moonstone, Flower Cut, Translucent

10.37ctw Brown Moonstone, Flower Cut, Translucent

12 x 12 mm (calibrated)

$ 45.45

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2.05ct Red Almandine Garnet, Baguette, VVS

2.05ct Red Almandine Garnet, Baguette, VVS

10 x 4.9 mm

$ 17.02

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1.36ct Pink Morganite, Oval, VS

1.36ct Pink Morganite, Oval, VS

8.4 x 6.2 mm

$ 104.30

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0.78ct Orange Zircon, Oval, VVS-VS

0.78ct Orange Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 19.42

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0.45ct Yellow Color-Change Diaspore, Cushion, VVS

0.45ct Yellow Color-Change Diaspore, Cushion, VVS

5.7 x 4.2 mm

$ 23.75

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1.76ct Orange Hessonite Garnet, Round, VS-SI

1.76ct Orange Hessonite Garnet, Round, VS-SI

6.5 mm (calibrated)

$ 32.78

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26.30ct Yellow Rutile Quartz, Fancy, Transparent
Rutile Quartz Product Video (744016)

26.30ct Yellow Rutile Quartz, Fancy, Transparent

16.6 x 16 mm

$ 311.28

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0.19ct Violet Iolite, Round, VS

0.19ct Violet Iolite, Round, VS

3.8 mm

$ 7.57

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0.66ct Yellow Citrine, Heart, VVS

0.66ct Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 5.26

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2.10ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.10ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8.6 x 6.7 mm

$ 35.79

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0.06ct Black Diamond, Round, Opaque

0.06ct Black Diamond, Round, Opaque

2.4 mm (calibrated)

$ 29.03

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6.46ctw White Topaz, Oval, VVS-VS

6.46ctw White Topaz, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 42.47

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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

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
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Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
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Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate
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