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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
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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0.25ct Yellow Spessartite Garnet, Oval, VS

0.25ct Yellow Spessartite Garnet, Oval, VS

3.9 x 3.2 mm

$ 7.47

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11.70ct Green Druzy Variscite, Fancy, Opaque

11.70ct Green Druzy Variscite, Fancy, Opaque

23 x 14.8 mm

$ 16.32

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1.76ctw Multicolor Andalusite, Oval, VS

1.76ctw Multicolor Andalusite, Oval, VS

5 x 3.2 mm

$ 94.02

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1.05ctw Orange Citrine, Marquise, VS

1.05ctw Orange Citrine, Marquise, VS

8.1 x 4.1 mm

$ 5.76

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2.86ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.86ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.9 x 5.2 mm

$ 11.35

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8.15ct Multicolor Fossil Coral, Fancy, Opaque

8.15ct Multicolor Fossil Coral, Fancy, Opaque

19.1 x 12.6 mm

$ 17.68

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2.42ct Multicolor Labradorite, Pear Shape, Translucent

2.42ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.35

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16.66ct Purple Ruby-Zoisite, Flower Cut, Opaque

16.66ct Purple Ruby-Zoisite, Flower Cut, Opaque

15.2 x 14 mm

$ 20.25

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

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

6.5 x 4.8 mm

$ 47.02

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1.28ctw Yellow Citrine, Pear Shape, VVS-VS

1.28ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 8.42

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1.01ct Orange Hessonite Garnet, Pear Shape, VS-SI

1.01ct Orange Hessonite Garnet, Pear Shape, VS-SI

7.5 x 5.7 mm

$ 22.13

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1.01ct Purple Spinel, Cushion, VS
Spinel Product Video (743185)

1.01ct Purple Spinel, Cushion, VS

6 x 6 mm (calibrated)

$ 100.60

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2.89ctw Multicolor Opal, Oval, Transparent

2.89ctw Multicolor Opal, Oval, Transparent

10.6 x 7.9 mm

$ 72.67

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1.51ct Multicolor Opal, Oval, Transparent

1.51ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 58.50

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1.87ct Orange Zircon, Pear Shape, VVS

1.87ct Orange Zircon, Pear Shape, VVS

8.4 x 6.2 mm

$ 41.18

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1.02ct Orange Hessonite Garnet, Emerald Cut, VS

1.02ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 18.73

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1.82ct Green Tourmaline, Oval, VVS-VS
Tourmaline Product Video (747782)

1.82ct Green Tourmaline, Oval, VVS-VS

7.3 x 6.7 mm

$ 211.48

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40.97ct Pink Rose Quartz, Oval, Transparent/Translucent

40.97ct Pink Rose Quartz, Oval, Transparent/Translucent

25.5 x 22.1 mm

$ 53.87

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7.43ct Multicolor Agate, Oval, Opaque

7.43ct Multicolor Agate, Oval, Opaque

13 x 11 mm (calibrated)

$ 12.58

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1.83ct Orange Zircon, Oval, VS

1.83ct Orange Zircon, Oval, VS

8 x 6 mm (calibrated)

$ 50.13

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5.89ct Orange Sunstone, Oval, Translucent

5.89ct Orange Sunstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 31.21

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23.22ct Multicolor Amethyst Geode Slice, Fancy, Transparent

23.22ct Multicolor Amethyst Geode Slice, Fancy, Transparent

25.1 x 19.9 mm

$ 24.75

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4.27ct Pink Strawberry Quartz, Oval, Translucent

4.27ct Pink Strawberry Quartz, Oval, Translucent

12.2 x 8.9 mm

$ 25.64

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1.19ct Yellow Citrine, Square, VS

1.19ct Yellow Citrine, Square, VS

6.5 x 6.5 mm

$ 7.82

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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

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

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
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