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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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2.11ctw Orange Citrine, Heart, VS

2.11ctw Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 17.51

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0.57ct Yellow Tourmaline, Round, Transparent

0.57ct Yellow Tourmaline, Round, Transparent

5 mm (calibrated)

$ 11.35

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8.50ct Multicolor Dendritic Agate, Pear Shape, Opaque

8.50ct Multicolor Dendritic Agate, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 16.93

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2.25ct Green Prehnite, Oval, Transparent

2.25ct Green Prehnite, Oval, Transparent

9 x 7.9 mm

$ 14.53

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86.05ct Multicolor Rhodonite, Round, Opaque
Rhodonite Product Video (693349)

86.05ct Multicolor Rhodonite, Round, Opaque

37.1 mm

$ 49.71

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1.18ctw Yellow Citrine, Pear Shape, VVS-VS

1.18ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 7.76

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0.46ct Green Chrome Diopside, Oval, VVS-VS

0.46ct Green Chrome Diopside, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 11.45

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1.12ct Multicolor Opal, Pear Shape, Transparent

1.12ct Multicolor Opal, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 51.53

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1.10ct Violet Amethyst, Square, VS

1.10ct Violet Amethyst, Square, VS

6 x 6 mm (calibrated)

$ 8.76

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4.99ct Yellow Citrine, Oval, VVS

4.99ct Yellow Citrine, Oval, VVS

13.3 x 10.3 mm

$ 32.80

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7.04ctw Violet Amethyst, Oval, Transparent

7.04ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 38.56

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17.23ctw Multicolor Jasper, Trillion, Opaque

17.23ctw Multicolor Jasper, Trillion, Opaque

21.4 x 18.8 mm

$ 10.13

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0.91ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.91ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.1 x 4.5 mm

$ 40.90

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2.71ct Violet Amethyst, Trillion, VS

2.71ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 14.85

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1.68ct Orange Zircon, Pear Shape, VVS

1.68ct Orange Zircon, Pear Shape, VVS

7.7 x 6.3 mm

$ 37.00

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2.84ct Multicolor Labradorite, Pear Shape, Translucent

2.84ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 6.27

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0.99ct Yellow Morganite, Oval, VS

0.99ct Yellow Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 43.38

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1.43ct Green Tourmaline, Emerald Cut, VS

1.43ct Green Tourmaline, Emerald Cut, VS

14.3 x 3.8 mm

$ 30.05

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0.74ct Multicolor Opal, Pear Shape, Transparent

0.74ct Multicolor Opal, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 18.43

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8.51ct Black Star Diopside, Round, Opaque

8.51ct Black Star Diopside, Round, Opaque

11 mm (calibrated)

$ 42.38

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5.01ct Orange Sunstone, Oval, Translucent

5.01ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 29.91

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0.71ct Multicolor Opal, Round, Transparent

0.71ct Multicolor Opal, Round, Transparent

6.5 mm (calibrated)

$ 14.38

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2.16ct Orange Sunstone, Round, Translucent

2.16ct Orange Sunstone, Round, Translucent

8.5 mm (calibrated)

$ 12.91

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1.90ctw Orange Spessartite Garnet, Round, VS

1.90ctw Orange Spessartite Garnet, Round, VS

4.5 mm (calibrated)

$ 58.66

View Gem
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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

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
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

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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