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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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1.40ct Pink Morganite, Round, VS-SI

1.40ct Pink Morganite, Round, VS-SI

7 mm (calibrated)

$ 76.69

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1.07ct Green Peridot, Oval, VS

1.07ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 9.59

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3.15ct Yellow Citrine, Oval, VVS-VS

3.15ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 24.16

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47.47ct Brown Tiger'S Eye, Oval, Opaque

47.47ct Brown Tiger'S Eye, Oval, Opaque

32.5 x 24.3 mm

$ 36.89

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31.72ct Multicolor Opal, Oval, Opaque

31.72ct Multicolor Opal, Oval, Opaque

31.2 x 22.8 mm

$ 94.78

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15.65ct Turquoise Chrysocolla, Oval, Opaque

15.65ct Turquoise Chrysocolla, Oval, Opaque

21.4 x 15.5 mm

$ 22.21

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1.04ct Orange Zircon, Oval, VS

1.04ct Orange Zircon, Oval, VS

6 x 5 mm

$ 15.54

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16.28ct Black Tourmaline, Emerald Cut, Opaque

16.28ct Black Tourmaline, Emerald Cut, Opaque

18.8 x 11.1 mm

$ 81.07

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1.64ctw Red Pyrope Garnet, Heart, VVS-VS

1.64ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.58

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4.34ct Orange Sunstone, Oval, Translucent

4.34ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 25.83

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5.60ctw Yellow Prehnite, Round, Transparent
Prehnite Product Video (368678)

5.60ctw Yellow Prehnite, Round, Transparent

6.5 mm (calibrated)

$ 25.16

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1.36ct Green Tourmaline, Emerald Cut, VVS-VS

1.36ct Green Tourmaline, Emerald Cut, VVS-VS

17.9 x 3.1 mm

$ 32.78

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0.98ct Multicolor Opal, Oval, Translucent

0.98ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 24.24

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4.40ctw White Topaz, Cushion, VVS-VS

4.40ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 24.10

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1.00ct Violet Spinel, Oval, VS-SI

1.00ct Violet Spinel, Oval, VS-SI

6.9 x 5.7 mm

$ 103.02

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19.07ct Yellow Calcite, Pear Shape, Opaque

19.07ct Yellow Calcite, Pear Shape, Opaque

33.3 x 13.3 mm

$ 13.11

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2.72ct Orange Moonstone, Marquise, Translucent

2.72ct Orange Moonstone, Marquise, Translucent

14 x 7 mm (calibrated)

$ 5.42

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12.36ct Green Maw-Sit-Sit, Oval, Opaque

12.36ct Green Maw-Sit-Sit, Oval, Opaque

14.7 x 12.4 mm

$ 40.63

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1.14ct Green Tourmaline, Oval, VVS

1.14ct Green Tourmaline, Oval, VVS

6.5 x 5.6 mm

$ 59.95

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2.76ct Purple Rhodolite Garnet, Oval, VS
Rhodolite Garnet Product Video (735250)

2.76ct Purple Rhodolite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 109.96

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7.84ct Brown Tiger'S Eye, Oval, Opaque

7.84ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 7.81

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1.26ct Orange Hessonite Garnet, Cushion, VS-SI

1.26ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 19.71

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0.31ct Green Kornerupine, Baguette, VS

0.31ct Green Kornerupine, Baguette, VS

5 x 3.3 mm

$ 16.98

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1.05ct Multicolor Opal, Oval, Transparent

1.05ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 33.03

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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

the selection is good as are the prices

Posted By Old man in August, 2025
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Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

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Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
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I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
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Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
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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
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