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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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0.93ct Yellow Citrine, Square, VVS

0.93ct Yellow Citrine, Square, VVS

6 x 6 mm (calibrated)

$ 6.48

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4.28ct Pink Strawberry Quartz, Oval, Translucent

4.28ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 32.83

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12.39ctw Brown Smoky Quartz, Pear Shape, VVS

12.39ctw Brown Smoky Quartz, Pear Shape, VVS

15.2 x 11.1 mm

$ 40.73

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88.94ct Green Amazonite, Square, Opaque

88.94ct Green Amazonite, Square, Opaque

27.2 x 27.1 mm

$ 51.68

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62.57ct Multicolor Jasper, Cushion, Opaque

62.57ct Multicolor Jasper, Cushion, Opaque

33.9 x 21.8 mm

$ 39.08

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0.77ct Blue Kyanite, Oval, SI-I1

0.77ct Blue Kyanite, Oval, SI-I1

6.4 x 4.3 mm

$ 16.87

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8.02ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (614328)

8.02ct Turquoise Grandidierite, Oval, Translucent

14.7 x 10.9 mm

$ 230.92

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1.62ct Green Tsavorite Garnet, Oval, VS
Tsavorite Garnet Product Video (750126)

1.62ct Green Tsavorite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 900.88

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1.83ct Green Prehnite, Oval, Transparent

1.83ct Green Prehnite, Oval, Transparent

8 x 6.9 mm

$ 11.81

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0.95ct Yellow Sphalerite, Round, SI-I1

0.95ct Yellow Sphalerite, Round, SI-I1

5.7 mm

$ 47.31

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32.47ct Multicolor Jasper, Oval, Opaque

32.47ct Multicolor Jasper, Oval, Opaque

31.9 x 23.4 mm

$ 26.68

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2.28ct Red Rubellite Tourmaline, Oval, Translucent

2.28ct Red Rubellite Tourmaline, Oval, Translucent

9 x 7 mm (calibrated)

$ 74.94

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11.67ct Green Jadeite, Oval, Translucent

11.67ct Green Jadeite, Oval, Translucent

18 x 13 mm (calibrated)

$ 19.17

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4.56ctw Green Peridot, Oval, VS

4.56ctw Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 49.96

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1.12ct Violet Spinel, Cushion, VS

1.12ct Violet Spinel, Cushion, VS

6.3 x 5.2 mm

$ 77.49

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21.17ct Pink Rose Quartz, Oval, Transparent

21.17ct Pink Rose Quartz, Oval, Transparent

18 x 13 mm (calibrated)

$ 27.83

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2.99ct Violet Amethyst, Trillion, VS

2.99ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.41

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5.42ct Pink Rose Quartz, Round, Transparent

5.42ct Pink Rose Quartz, Round, Transparent

11 mm (calibrated)

$ 29.69

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22.78ct Gray Hematite, Baguette, Opaque

22.78ct Gray Hematite, Baguette, Opaque

17.3 x 14.5 mm

$ 22.21

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7.56ctw Brown Moonstone, Flower Cut, Translucent

7.56ctw Brown Moonstone, Flower Cut, Translucent

12 x 12 mm (calibrated)

$ 33.13

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4.40ctw Red Pyrope Garnet, Marquise, VVS

4.40ctw Red Pyrope Garnet, Marquise, VVS

12 x 6.1 mm

$ 38.56

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1.77ct Green Tourmaline, Emerald Cut, VVS

1.77ct Green Tourmaline, Emerald Cut, VVS

14.3 x 3.8 mm

$ 48.49

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0.84ct Yellow Morganite, Pear Shape, VS

0.84ct Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 36.81

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4.68ct Green Prehnite, Fancy, Translucent

4.68ct Green Prehnite, Fancy, Translucent

12.6 x 9.5 mm

$ 7.69

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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

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab 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

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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