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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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0.59ct Orange Spessartite Garnet, Oval, VS-SI

0.59ct Orange Spessartite Garnet, Oval, VS-SI

5.2 x 4.2 mm

$ 20.57

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56.79ctw Multicolor Labradorite, Round, Translucent

56.79ctw Multicolor Labradorite, Round, Translucent

25.2 mm

$ 125.56

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3.45ctw Yellow Citrine, Round, VVS

3.45ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 27.49

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8.10ct Blue Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439652)

8.10ct Blue Hemimorphite Druzy, Fancy, Opaque

14 x 12 mm (calibrated)

$ 133.12

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2.49ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.49ctw White Sillimanite Cat'S Eye, Oval, Translucent

7 x 5 mm (calibrated)

$ 9.87

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68.39ctw Gray Hematite, Pear Shape, Opaque

68.39ctw Gray Hematite, Pear Shape, Opaque

24.9 x 20 mm

$ 66.69

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4.29ct Brown Rutile Topaz, Heart, Transparent

4.29ct Brown Rutile Topaz, Heart, Transparent

9.6 x 9.4 mm

$ 89.02

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6.34ct Violet Amethyst, Oval, Transparent

6.34ct Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 34.73

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1.47ct Multicolor Pietersite, Oval, Opaque

1.47ct Multicolor Pietersite, Oval, Opaque

11.1 x 6.3 mm

$ 3.47

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0.69ct Green Tourmaline, Round, Transparent

0.69ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 10.50

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0.76ct Green Peridot, Oval, VVS-VS

0.76ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.81

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2.57ctw Yellow Citrine, Round, VVS

2.57ctw Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 17.92

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5.45ct Black Star Diopside, Oval, Opaque

5.45ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 27.14

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0.16ctw White Diamond, Round, VVS-VS
Diamond Product Video (567400)

0.16ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 260.04

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54.96ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

54.96ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

40.5 x 22.8 mm

$ 24.63

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5.85ct White Topaz, Round, VVS-VS

5.85ct White Topaz, Round, VVS-VS

11 mm (calibrated)

$ 40.79

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3.69ctw Brown Smoky Quartz, Round, VS

3.69ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 8.08

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4.35ct Pink Strawberry Quartz, Oval, Translucent

4.35ct Pink Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 33.37

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7.55ct Multicolor Labradorite, Round, Translucent

7.55ct Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 9.02

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1.27ct Green Sphene, Oval, VS-SI

1.27ct Green Sphene, Oval, VS-SI

7.3 x 5.3 mm

$ 76.53

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1.23ct Blue Kyanite, Oval, SI

1.23ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 30.63

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1.06ct Yellow Beryl, Cushion, VVS

1.06ct Yellow Beryl, Cushion, VVS

8 x 6 mm (calibrated)

$ 25.34

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1.80ct Blue Cavansite, Fancy, Opaque

1.80ct Blue Cavansite, Fancy, Opaque

10.2 x 9 mm

$ 10.46

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1.96ctw Red Pyrope Garnet, Oval, VVS-VS

1.96ctw Red Pyrope Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 21.47

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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 -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

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

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

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.

Posted By PickyShopper in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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