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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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0.88ct Green Tourmaline, Baguette, VS

0.88ct Green Tourmaline, Baguette, VS

8.1 x 3.7 mm

$ 30.68

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0.42ct Yellow Citrine, Heart, VVS

0.42ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.34

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67.25ct Green Bloodstone, Pear Shape, Opaque

67.25ct Green Bloodstone, Pear Shape, Opaque

44.1 x 30.3 mm

$ 30.14

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50.87ct Multicolor Jasper, Baguette, Opaque

50.87ct Multicolor Jasper, Baguette, Opaque

28.1 x 21.8 mm

$ 24.52

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0.70ct Pink Morganite, Pear Shape, VVS

0.70ct Pink Morganite, Pear Shape, VVS

8.7 x 4.7 mm

$ 42.18

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0.90ct Yellow Color-Change Diaspore, Cushion, VS

0.90ct Yellow Color-Change Diaspore, Cushion, VS

5.6 x 5.5 mm

$ 33.32

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0.76ct Green Peridot, Oval, VVS-VS

0.76ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.30

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0.74ct Yellow Citrine, Heart, VVS-VS

0.74ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.16

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1.82ct Yellow Citrine, Round, VVS

1.82ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.69

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0.92ct Red Malaya Garnet, Marquise, VVS-VS

0.92ct Red Malaya Garnet, Marquise, VVS-VS

9 x 4.7 mm

$ 35.28

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8.64ctw Black Spinel, Round, Opaque

8.64ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 33.13

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1.74ct Orange Moonstone, Square, Translucent

1.74ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.49

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1.11ct Pink Morganite, Round, VS

1.11ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 43.12

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0.90ct Red Malaya Garnet, Marquise, VS-SI

0.90ct Red Malaya Garnet, Marquise, VS-SI

9.1 x 4.7 mm

$ 41.42

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23.64ct White Howlite, Pear Shape, Opaque

23.64ct White Howlite, Pear Shape, Opaque

27.4 x 19 mm

$ 11.77

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1.88ct Yellow Citrine, Round, VVS-VS

1.88ct Yellow Citrine, Round, VVS-VS

8 mm (calibrated)

$ 14.98

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1.76ct Pink Tourmaline, Cushion, Transparent

1.76ct Pink Tourmaline, Cushion, Transparent

7 x 7 mm (calibrated)

$ 22.76

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1.80ct Orange Hessonite Garnet, Oval, VS-SI

1.80ct Orange Hessonite Garnet, Oval, VS-SI

8.3 x 6.7 mm

$ 26.84

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25.35ct Pink Rose Quartz, Oval, Transparent

25.35ct Pink Rose Quartz, Oval, Transparent

21.6 x 18.8 mm

$ 45.55

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5.40ctw Purple Rhodolite Garnet, Oval, VS

5.40ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 114.83

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0.92ct Green Tourmaline, Emerald Cut, VVS

0.92ct Green Tourmaline, Emerald Cut, VVS

7.7 x 4.3 mm

$ 45.82

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30.80ctw Multicolor Fossil Coral, Cushion, Opaque

30.80ctw Multicolor Fossil Coral, Cushion, Opaque

18.8 x 13.3 mm

$ 36.45

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23.22ctw Multicolor Jasper, Pear Shape, Opaque

23.22ctw Multicolor Jasper, Pear Shape, Opaque

25.1 x 15.1 mm

$ 13.65

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2.20ct Orange Moonstone, Cushion, Translucent

2.20ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.38

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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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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