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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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Orange Untreated Gemstones
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3.86ct Green Prehnite, Fancy, Transparent

3.86ct Green Prehnite, Fancy, Transparent

14 x 9 mm (calibrated)

$ 6.26

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14.60ct Gray Hematite, Marquise, Opaque

14.60ct Gray Hematite, Marquise, Opaque

25 x 11.8 mm

$ 14.23

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4.31ct Pink Morganite, Pear Shape, Transparent

4.31ct Pink Morganite, Pear Shape, Transparent

14 x 10 mm (calibrated)

$ 47.22

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2.85ctw Orange Citrine, Pear Shape, VS

2.85ctw Orange Citrine, Pear Shape, VS

10 x 7 mm (calibrated)

$ 23.66

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0.20ct White Diamond, Round, VS

0.20ct White Diamond, Round, VS

3.5 mm (calibrated)

$ 335.79

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7.05ct Multicolor Fire Agate, Fancy, Opaque

7.05ct Multicolor Fire Agate, Fancy, Opaque

17.6 x 9.2 mm

$ 60.17

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6.83ct Multicolor Agate, Oval, Opaque

6.83ct Multicolor Agate, Oval, Opaque

12.4 x 11 mm

$ 6.81

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1.77ct Green Tourmaline, Emerald Cut, VS

1.77ct Green Tourmaline, Emerald Cut, VS

15.5 x 3.8 mm

$ 37.78

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1.53ct Orange Zircon, Emerald Cut, VVS

1.53ct Orange Zircon, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 25.15

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44.30ct Blue Sodalite, Oval, Opaque

44.30ct Blue Sodalite, Oval, Opaque

31.9 x 23 mm

$ 44.12

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6.95ct Violet Amethyst, Oval, Transparent

6.95ct Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 38.08

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2.19ctw Multicolor Andalusite, Oval, VS

2.19ctw Multicolor Andalusite, Oval, VS

6 x 4 mm (calibrated)

$ 99.97

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2.08ct Orange Hessonite Garnet, Oval, VS

2.08ct Orange Hessonite Garnet, Oval, VS

9.3 x 7.6 mm

$ 36.30

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2.43ctw Multicolor Labradorite, Round, Translucent

2.43ctw Multicolor Labradorite, Round, Translucent

6 mm (calibrated)

$ 2.91

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1.64ct Green Prehnite, Oval, Transparent/Translucent

1.64ct Green Prehnite, Oval, Transparent/Translucent

7.4 x 7 mm

$ 8.17

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39.89ct Blue Turquoise, Oval, Opaque
Turquoise Product Video (709316)

39.89ct Blue Turquoise, Oval, Opaque

23.8 x 18.8 mm

$ 119.19

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0.55ct Orange Spessartite Garnet, Oval, VS-SI

0.55ct Orange Spessartite Garnet, Oval, VS-SI

5.1 x 4.2 mm

$ 19.17

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13.68ct Yellow Calcite, Pear Shape, Translucent

13.68ct Yellow Calcite, Pear Shape, Translucent

24.9 x 12.9 mm

$ 9.40

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1.45ct Purple Tourmaline, Oval, VS

1.45ct Purple Tourmaline, Oval, VS

9 x 7 mm (calibrated)

$ 72.50

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0.12ct Violet Iolite, Square, VVS

0.12ct Violet Iolite, Square, VVS

3 x 3 mm (calibrated)

$ 4.78

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1.44ct Yellow Citrine, Emerald Cut, VVS-VS

1.44ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 9.46

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2.83ct Violet Amethyst, Trillion, VVS-VS

2.83ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 22.55

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12.66ct Pink Rose Quartz, Emerald Cut, Transparent

12.66ct Pink Rose Quartz, Emerald Cut, Transparent

15 x 15 mm (calibrated)

$ 69.35

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2.94ct Yellow Golden Beryl, Oval, VVS-VS

2.94ct Yellow Golden Beryl, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 73.57

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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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 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 -> 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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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