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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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12.20ctw White Topaz, Cushion, VS

12.20ctw White Topaz, Cushion, VS

12 x 10 mm (calibrated)

$ 81.01

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2.24ct Yellow Citrine, Flower Cut, Transparent

2.24ct Yellow Citrine, Flower Cut, Transparent

8 x 8 mm (calibrated)

$ 17.18

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0.25ct Green Tsavorite Garnet, Oval, VVS

0.25ct Green Tsavorite Garnet, Oval, VVS

5 x 3 mm (calibrated)

$ 12.45

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1.02ct Orange Zircon, Oval, VVS

1.02ct Orange Zircon, Oval, VVS

5.9 x 4.8 mm

$ 15.24

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6.83ct Pink Morganite, Pear Shape, Transparent

6.83ct Pink Morganite, Pear Shape, Transparent

15 x 10 mm (calibrated)

$ 74.83

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0.56ct Purple Spinel, Cushion, VS

0.56ct Purple Spinel, Cushion, VS

6 x 4 mm (calibrated)

$ 39.04

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13.04ctw Blue Chalcedony, Round, Transparent

13.04ctw Blue Chalcedony, Round, Transparent

13 mm (calibrated)

$ 14.28

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9.98ct Pink Strawberry Quartz, Oval, Translucent

9.98ct Pink Strawberry Quartz, Oval, Translucent

15.4 x 12.7 mm

$ 76.54

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17.63ct Multicolor Boulder Opal, Fancy, Opaque

17.63ct Multicolor Boulder Opal, Fancy, Opaque

23.8 x 14.9 mm

$ 87.80

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1.89ct Purple Spinel, Cushion, VVS-VS
Spinel Product Video (483741)

1.89ct Purple Spinel, Cushion, VVS-VS

7.6 x 6 mm

$ 94.12

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1.51ct Violet Amethyst, Marquise, VS

1.51ct Violet Amethyst, Marquise, VS

11.8 x 6.1 mm

$ 9.93

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2.04ct Orange Zircon, Round, VVS

2.04ct Orange Zircon, Round, VVS

7 mm (calibrated)

$ 55.88

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1.46ct Orange Hessonite Garnet, Emerald Cut, VS

1.46ct Orange Hessonite Garnet, Emerald Cut, VS

6.1 x 5 mm

$ 24.00

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5.90ct Black Star Diopside, Oval, Opaque

5.90ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 29.38

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36.40ct Multicolor Jasper, Fancy, Opaque

36.40ct Multicolor Jasper, Fancy, Opaque

39.6 x 11.2 mm

$ 7.25

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1.35ct Purple Tourmaline, Round, Transparent

1.35ct Purple Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 20.60

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7.18ct Green Prehnite, Fancy, Translucent

7.18ct Green Prehnite, Fancy, Translucent

16.3 x 9.9 mm

$ 11.80

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1.94ct Orange Hessonite Garnet, Oval, VS

1.94ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.8 mm

$ 31.88

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2.91ct Violet Amethyst, Trillion, VVS-VS

2.91ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.13

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0.81ct Pink Tourmaline, Oval, Transparent

0.81ct Pink Tourmaline, Oval, Transparent

6.5 x 4.9 mm

$ 32.27

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0.32ct Violet Iolite, Baguette, VS-SI

0.32ct Violet Iolite, Baguette, VS-SI

5 x 3 mm (calibrated)

$ 12.75

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0.45ct Multicolor Opal, Pear Shape, Transparent

0.45ct Multicolor Opal, Pear Shape, Transparent

7.7 x 4.9 mm

$ 11.21

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1.22ct White Sillimanite Cat'S Eye, Oval, Transparent

1.22ct White Sillimanite Cat'S Eye, Oval, Transparent

6.7 x 5.4 mm

$ 3.64

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20.11ct Bi-Color Ametrine, Trillion, VVS

20.11ct Bi-Color Ametrine, Trillion, VVS

18.5 x 16.8 mm

$ 147.17

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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

Very good place to buy gemstones

Posted By Elansary in March, 2026
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Overall Rating -> 9 star ratings

I think therea's no problem

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

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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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

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate
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