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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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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
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2.00ct Orange Sunstone, Round, Translucent

2.00ct Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 10.87

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0.75ct Yellow Beryl, Trillion, VVS

0.75ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 14.94

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27.09ct Gray Hematite, Square, Opaque
Hematite Product Video (556098)

27.09ct Gray Hematite, Square, Opaque

18 x 18 mm (calibrated)

$ 27.30

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1.15ct Orange Hessonite Garnet, Cushion, VS

1.15ct Orange Hessonite Garnet, Cushion, VS

7 x 5 mm (calibrated)

$ 22.91

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32.35ct Yellow Obsidian, Cushion, Opaque

32.35ct Yellow Obsidian, Cushion, Opaque

29.7 x 17.1 mm

$ 35.45

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6.48ct Multicolor Agate, Round, Opaque

6.48ct Multicolor Agate, Round, Opaque

11 mm (calibrated)

$ 9.15

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19.74ct Orange Moonstone, Round, Translucent

19.74ct Orange Moonstone, Round, Translucent

16 mm (calibrated)

$ 32.77

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0.98ct Blue Kyanite, Oval, SI

0.98ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 19.52

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4.33ct Violet Amethyst, Pear Shape, VVS

4.33ct Violet Amethyst, Pear Shape, VVS

13 x 9 mm (calibrated)

$ 33.21

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0.98ct Purple Spinel, Cushion, VS

0.98ct Purple Spinel, Cushion, VS

6.2 x 5 mm

$ 69.06

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2.73ct Multicolor Labradorite, Pear Shape, Translucent

2.73ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 6.03

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0.79ct Yellow Citrine, Heart, VVS

0.79ct Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 5.51

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2.83ct Purple Rhodolite Garnet, Oval, SI

2.83ct Purple Rhodolite Garnet, Oval, SI

9.7 x 7.6 mm

$ 169.80

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39.78ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (528817)

39.78ct Pink Rose Quartz, Oval, Transparent

23.9 x 20 mm

$ 87.17

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2.98ctw Red Pyrope Garnet, Square, VVS-VS

2.98ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 22.86

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0.36ct Blue Kyanite, Round, SI

0.36ct Blue Kyanite, Round, SI

4 mm (calibrated)

$ 8.96

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8.19ct Multicolor Fire Agate, Fancy, Opaque
Fire Agate Product Video (574855)

8.19ct Multicolor Fire Agate, Fancy, Opaque

14.4 x 13 mm

$ 61.55

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2.17ctw Green Demantoid Garnet, Oval, VS-SI

2.17ctw Green Demantoid Garnet, Oval, VS-SI

5.9 x 4.2 mm

$ 237.75

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1.49ct Green Tourmaline, Oval, VS
Tourmaline Product Video (730435)

1.49ct Green Tourmaline, Oval, VS

8.5 x 6.4 mm

$ 207.77

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1.34ct Pink Tourmaline, Oval, Transparent

1.34ct Pink Tourmaline, Oval, Transparent

7.9 x 5.7 mm

$ 22.97

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3.58ctw Brown Smoky Quartz, Round, VS

3.58ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.85

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2.28ct Orange Moonstone, Square, Translucent

2.28ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.57

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2.65ct Green Sphene, Oval, Transparent

2.65ct Green Sphene, Oval, Transparent

8.2 x 7.4 mm

$ 14.53

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1.51ct Orange Hessonite Garnet, Oval, VS

1.51ct Orange Hessonite Garnet, Oval, VS

7.5 x 6.2 mm

$ 30.08

View Gem
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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 website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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 -> 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 been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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