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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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1.84ctw Orange Hessonite Garnet, Square, VS
Hessonite Garnet Product Video (381262)

1.84ctw Orange Hessonite Garnet, Square, VS

3.8 x 3.7 mm

$ 39.14

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2.25ct Yellow Citrine, Oval, VVS

2.25ct Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 17.26

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4.88ctw Red Pyrope Garnet, Marquise, VS

4.88ctw Red Pyrope Garnet, Marquise, VS

10.1 x 5.1 mm

$ 42.77

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129.84ct Pink Star Rose Quartz, Oval, Translucent
Star Rose Quartz Product Video (741080)

129.84ct Pink Star Rose Quartz, Oval, Translucent

30.1 x 26.5 mm

$ 215.53

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3.76ct Yellow Citrine, Cushion, VVS-VS

3.76ct Yellow Citrine, Cushion, VVS-VS

13.9 x 7.9 mm

$ 28.83

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3.10ct Yellow Rutile Topaz, Pear Shape, Transparent

3.10ct Yellow Rutile Topaz, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 64.33

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20.16ctw Multicolor Fossil Coral, Pear Shape, Opaque

20.16ctw Multicolor Fossil Coral, Pear Shape, Opaque

19.1 x 12.6 mm

$ 39.76

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1.98ct Orange Moonstone, Trillion, Translucent

1.98ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 3.94

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23.52ct Bi-Color Ametrine, Oval, VS

23.52ct Bi-Color Ametrine, Oval, VS

23.4 x 15.8 mm

$ 180.38

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3.66ct Yellow Citrine, Oval, VVS-VS

3.66ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 28.07

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35.68ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

35.68ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

15 mm (calibrated)

$ 65.16

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6.60ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

6.60ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 17.09

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1.55ct Yellow Beryl, Round, VVS

1.55ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 30.88

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24.74ctw Multicolor Fossil Coral, Oval, Opaque

24.74ctw Multicolor Fossil Coral, Oval, Opaque

21.5 x 12.5 mm

$ 53.68

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1.80ctw Orange Hessonite Garnet, Square, VS

1.80ctw Orange Hessonite Garnet, Square, VS

3.8 x 3.7 mm

$ 38.30

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0.91ct Green Sphene, Oval, Transparent

0.91ct Green Sphene, Oval, Transparent

6.2 x 5.1 mm

$ 4.53

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0.30ct Orange Sphalerite, Round, SI

0.30ct Orange Sphalerite, Round, SI

4 mm (calibrated)

$ 14.94

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1.86ct White Moonstone, Oval, Transparent

1.86ct White Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 14.82

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3.02ctw Yellow Golden Beryl, Oval, VVS-VS

3.02ctw Yellow Golden Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 66.18

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33.09ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

33.09ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

41 x 20.5 mm

$ 15.16

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6.19ct Green Druzy Variscite, Fancy, Opaque

6.19ct Green Druzy Variscite, Fancy, Opaque

20.1 x 12.9 mm

$ 6.36

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2.63ct Violet Amethyst, Round, VVS

2.63ct Violet Amethyst, Round, VVS

9 mm (calibrated)

$ 20.17

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46.73ct White Rainbow Moonstone, Oval, Translucent

46.73ct White Rainbow Moonstone, Oval, Translucent

33.9 x 21 mm

$ 46.55

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18.15ctw Multicolor Jasper, Oval, Opaque

18.15ctw Multicolor Jasper, Oval, Opaque

20.7 x 12.5 mm

$ 10.94

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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

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
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

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

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