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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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16.81ct Multicolor Jasper, Fancy, Opaque

16.81ct Multicolor Jasper, Fancy, Opaque

18.2 x 18.7 mm

$ 14.18

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3.68ct Pink Strawberry Quartz, Oval, Translucent

3.68ct Pink Strawberry Quartz, Oval, Translucent

13.1 x 9.5 mm

$ 22.10

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1.57ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.57ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 30.97

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18.63ct Green Maw-Sit-Sit, Oval, Opaque

18.63ct Green Maw-Sit-Sit, Oval, Opaque

20 x 14.4 mm

$ 61.24

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1.05ct Pink Morganite, Oval, VVS-VS

1.05ct Pink Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 69.02

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3.55ct Pink Strawberry Quartz, Round, Translucent

3.55ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 27.23

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1.05ct Brown Kornerupine, Pear Shape, VVS-VS

1.05ct Brown Kornerupine, Pear Shape, VVS-VS

8 x 5 mm (calibrated)

$ 57.52

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1.20ct Green Chrysoprase, Pear Shape, Translucent

1.20ct Green Chrysoprase, Pear Shape, Translucent

8 x 6 mm (calibrated)

$ 9.96

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3.56ct Pink Strawberry Quartz, Round, Translucent

3.56ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 21.76

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3.65ct Pink Strawberry Quartz, Oval, Transparent

3.65ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 27.37

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1.57ct Orange Hessonite Garnet, Oval, VS

1.57ct Orange Hessonite Garnet, Oval, VS

7.7 x 6.4 mm

$ 25.80

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2.78ct Blue Chalcedony, Oval, Transparent

2.78ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.54

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20.73ct White Rainbow Moonstone, Pear Shape, Translucent

20.73ct White Rainbow Moonstone, Pear Shape, Translucent

26 x 16.1 mm

$ 144.53

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9.06ct Black Star Diopside, Round, Opaque

9.06ct Black Star Diopside, Round, Opaque

11 mm (calibrated)

$ 45.12

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6.50ctw Multicolor Labradorite, Marquise, Translucent

6.50ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 14.38

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26.74ct Multicolor Jasper, Pear Shape, Opaque

26.74ct Multicolor Jasper, Pear Shape, Opaque

31.4 x 18.4 mm

$ 29.29

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4.38ctw Pink Malaya Garnet, Round, VS

4.38ctw Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 143.24

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1.53ct Orange Hessonite Garnet, Emerald Cut, VS

1.53ct Orange Hessonite Garnet, Emerald Cut, VS

6.3 x 6.2 mm

$ 30.17

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0.45ct Blue Kyanite, Round, SI

0.45ct Blue Kyanite, Round, SI

4.3 mm

$ 11.21

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7.50ctw Yellow Citrine, Pear Shape, VVS-VS

7.50ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 49.30

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8.44ct Brown Tiger'S Eye, Cushion, Opaque

8.44ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 8.41

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6.34ct Brown Moonstone, Oval, Translucent

6.34ct Brown Moonstone, Oval, Translucent

13 x 9 mm (calibrated)

$ 13.69

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2.29ctw Yellow Citrine, Round, VVS

2.29ctw Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 15.97

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5.06ct Multicolor Fire Agate, Oval, Opaque

5.06ct Multicolor Fire Agate, Oval, Opaque

10.9 x 10 mm

$ 38.90

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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

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
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Very easy to navigate with a great selection.

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Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
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Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

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Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
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Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
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