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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
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1.41ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.41ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5.5 mm

$ 4.63

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1.80ct Turquoise Grandidierite, Pear Shape, VS-SI
Grandidierite Product Video (471965)

1.80ct Turquoise Grandidierite, Pear Shape, VS-SI

9.3 x 7.8 mm

$ 986.04

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8.49ct Yellow Citrine, Emerald Cut, VVS

8.49ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 53.49

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0.38ct Orange Spessartite Garnet, Oval, VS

0.38ct Orange Spessartite Garnet, Oval, VS

4.5 x 3.6 mm

$ 11.35

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5.63ct Pink Morganite, Trillion, Transparent

5.63ct Pink Morganite, Trillion, Transparent

12 x 12 mm (calibrated)

$ 61.69

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1.20ct Yellow Beryl, Trillion, VVS-VS

1.20ct Yellow Beryl, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 28.68

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2.01ct Orange Hessonite Garnet, Oval, VS

2.01ct Orange Hessonite Garnet, Oval, VS

8.5 x 6.9 mm

$ 31.41

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2.73ctw White Topaz, Cushion, VVS-VS

2.73ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 14.96

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32.56ct Purple Kunzite, Pear Shape, Translucent
Kunzite Product Video (471041)

32.56ct Purple Kunzite, Pear Shape, Translucent

23.8 x 16.4 mm

$ 107.02

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0.58ct Green Peridot, Marquise, VS

0.58ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.67

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1.12ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

1.12ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

8.6 x 5.9 mm

$ 60.14

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0.74ctw Green Peridot, Pear Shape, VVS-VS

0.74ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 5.68

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6.32ct Violet Amethyst, Pear Shape, VVS-VS

6.32ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 48.46

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2.96ctw Yellow Citrine, Round, VVS

2.96ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 23.59

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1.72ct Green Sphene, Oval, Translucent

1.72ct Green Sphene, Oval, Translucent

7.4 x 6.5 mm

$ 8.57

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2.97ctw Red Pyrope Garnet, Square, VS

2.97ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.78

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1.21ct Yellow Citrine, Round, VS

1.21ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 8.03

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13.17ct Violet Amethyst, Emerald Cut, VVS

13.17ct Violet Amethyst, Emerald Cut, VVS

18 x 13 mm (calibrated)

$ 91.82

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6.21ctw Green Prehnite, Oval, Transparent/Translucent

6.21ctw Green Prehnite, Oval, Transparent/Translucent

9.9 x 8.7 mm

$ 17.00

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1.98ct Pink Morganite, Round, Transparent

1.98ct Pink Morganite, Round, Transparent

8 mm (calibrated)

$ 21.70

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12.61ct Violet Amethyst, Cushion, VVS

12.61ct Violet Amethyst, Cushion, VVS

15 x 15 mm (calibrated)

$ 87.91

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15.49ct Yellow Rutile Quartz, Pear Shape, Transparent

15.49ct Yellow Rutile Quartz, Pear Shape, Transparent

21.4 x 15.7 mm

$ 52.78

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1.50ct Green Tourmaline, Oval, VS

1.50ct Green Tourmaline, Oval, VS

7.6 x 6.1 mm

$ 174.30

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1.76ct Red Almandine Garnet, Baguette, VVS

1.76ct Red Almandine Garnet, Baguette, VVS

9.8 x 5 mm

$ 65.74

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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 -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
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Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
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Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
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Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 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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