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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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0.68ct Orange Fire Opal, Oval, Transparent

0.68ct Orange Fire Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 19.37

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0.68ct Yellow Color-Change Diaspore, Cushion, VS

0.68ct Yellow Color-Change Diaspore, Cushion, VS

5.6 x 4.8 mm

$ 23.85

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6.76ct Violet Amethyst, Briolette, VS

6.76ct Violet Amethyst, Briolette, VS

15.8 x 8.1 mm

$ 29.62

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2.44ct Green Tourmaline, Emerald Cut, VS

2.44ct Green Tourmaline, Emerald Cut, VS

18.5 x 4.3 mm

$ 80.19

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4.03ctw Red Pyrope Garnet, Marquise, VVS-VS

4.03ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 5.9 mm

$ 35.32

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1.12ct Pink Tourmaline, Oval, Transparent

1.12ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 19.21

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9.17ctw Black Spinel, Round, Opaque

9.17ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 35.17

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0.64ct Orange Sphalerite, Round, SI-I1

0.64ct Orange Sphalerite, Round, SI-I1

5 mm (calibrated)

$ 31.87

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4.99ct Turquoise Hemimorphite Druzy, Fancy, Opaque

4.99ct Turquoise Hemimorphite Druzy, Fancy, Opaque

13.8 x 8.2 mm

$ 83.40

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2.18ct Orange Hessonite Garnet, Oval, VS

2.18ct Orange Hessonite Garnet, Oval, VS

8.6 x 7.1 mm

$ 43.43

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3.80ct Yellow Citrine, Emerald Cut, VVS-VS

3.80ct Yellow Citrine, Emerald Cut, VVS-VS

12 x 8 mm (calibrated)

$ 26.49

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2.17ctw Pink Strawberry Quartz, Round, Transparent

2.17ctw Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 19.02

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5.02ct Yellow Cat'S Eye Opal, Oval, Opaque

5.02ct Yellow Cat'S Eye Opal, Oval, Opaque

12.3 x 9.2 mm

$ 15.00

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2.38ctw Pink Strawberry Quartz, Oval, Translucent

2.38ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 31.29

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1.14ct Yellow Citrine, Round, VVS

1.14ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 7.57

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5.95ct Yellow Citrine, Briolette, VVS

5.95ct Yellow Citrine, Briolette, VVS

14.9 x 8.4 mm

$ 32.07

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3.17ctw Yellow Citrine, Emerald Cut, VVS

3.17ctw Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 25.26

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24.09ct Red Star Garnet, Oval, Opaque

24.09ct Red Star Garnet, Oval, Opaque

16 x 13 mm

$ 23.75

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5.82ctw Green Amazonite, Round, Opaque

5.82ctw Green Amazonite, Round, Opaque

7 mm (calibrated)

$ 14.23

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1.08ct Orange Moonstone, Pear Shape, Transparent

1.08ct Orange Moonstone, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 2.15

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1.97ct Orange Hessonite Garnet, Oval, VS-SI

1.97ct Orange Hessonite Garnet, Oval, VS-SI

8.2 x 6.4 mm

$ 29.37

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0.62ct Orange Zircon, Oval, VVS-VS

0.62ct Orange Zircon, Oval, VVS-VS

5.2 x 4.1 mm

$ 9.26

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1.60ct Orange Hessonite Garnet, Oval, VVS-VS

1.60ct Orange Hessonite Garnet, Oval, VVS-VS

8 x 6.6 mm

$ 30.28

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14.24ctw Multicolor Pietersite, Pear Shape, Opaque

14.24ctw Multicolor Pietersite, Pear Shape, Opaque

21.2 x 11.4 mm

$ 53.75

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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

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

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 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

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

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

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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