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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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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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4.33ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.79

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2.49ctw Green Sphene, Round, Transparent

6 mm (calibrated)

$ 12.40

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2.59ct Yellow Sphene, Oval, Translucent

9.3 x 7.7 mm

$ 12.90

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2.89ct Yellow Sphene, Oval, Transparent

8.7 x 7.6 mm

$ 14.39

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0.49ct Yellow Citrine, Cushion, VS

5 x 5 mm (calibrated)

$ 3.66

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2.00ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 35.86

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1.99ct Yellow Citrine, Flower Cut, Transparent

8 x 8 mm (calibrated)

$ 15.26

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0.07ct Green Alexandrite, Oval, VS-SI

3.5 x 2.5 mm

$ 48.80

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2.18ct Pink Kunzite, Cushion, VVS

6.8 x 6.5 mm

$ 59.99

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7.02ct Turquoise Larimar, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 83.83

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1.65ct Blue Cavansite, Fancy, Opaque

10.3 x 7.6 mm

$ 9.59

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2.55ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 19.56

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2.05ct Purple Rhodolite Garnet, Oval, VS

8.4 x 6.6 mm

$ 84.47

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2.86ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.93

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1.03ct Orange Zircon, Oval, VVS-VS

6 x 5 mm

$ 25.65

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11.46ct Brown Smoky Quartz, Round, VS

15 mm (calibrated)

$ 18.83

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52.74ct Multicolor Rhodochrosite, Oval, Translucent

34 x 23.5 mm

$ 69.34

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0.52ct Yellow Beryl, Oval, VS

6.8 x 4.7 mm

$ 9.93

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28.99ct Green Jadeite, Oval, Translucent

27.1 x 22 mm

$ 47.64

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1.15ct White Sillimanite Cat'S Eye, Oval, Transparent

7.4 x 4.7 mm

$ 3.59

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1.59ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 31.67

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28.05ctw Multicolor Cinnabar, Cushion, Opaque

20 x 20 mm (calibrated)

$ 32.83

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17.42ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

20 x 18.4 mm

$ 114.51

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44.34ct Red Strawberry Quartz, Fancy, Opaque

37.3 x 12.4 mm

$ 4.42

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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

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate
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