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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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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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23.76ct Multicolor Quartz With Marcasite, Fancy, Transparent
Quartz With Marcasite Product Video (521569)

23.76ct Multicolor Quartz With Marcasite, Fancy, Transparent

20.5 x 16.2 mm

$ 156.19

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13.31ct Pink Kunzite, Cushion, VVS-VS
Kunzite Product Video (710239)

13.31ct Pink Kunzite, Cushion, VVS-VS

13.5 x 11.1 mm

$ 351.31

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4.55ct Yellow Citrine, Oval, VVS

4.55ct Yellow Citrine, Oval, VVS

14.1 x 9.4 mm

$ 27.57

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0.80ct Yellow Sphalerite, Oval, SI-I1

0.80ct Yellow Sphalerite, Oval, SI-I1

5.9 x 4.9 mm

$ 39.84

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2.13ct Orange Hessonite Garnet, Cushion, VS-SI

2.13ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 34.51

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2.82ct Violet Amethyst, Trillion, VVS-VS

2.82ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.66

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5.78ct Orange Spessartite Garnet, Oval, Transparent

5.78ct Orange Spessartite Garnet, Oval, Transparent

9.9 x 9 mm

$ 143.92

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33.95ct Multicolor Jasper, Fancy, Translucent

33.95ct Multicolor Jasper, Fancy, Translucent

40.2 x 21.8 mm

$ 24.34

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13.43ctw Green Aventurine, Pear Shape, Translucent

13.43ctw Green Aventurine, Pear Shape, Translucent

19 x 12.2 mm

$ 26.75

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2.15ct Red Almandine Garnet, Oval, VVS-VS

2.15ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 80.30

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1.56ct Orange Hessonite Garnet, Oval, VS

1.56ct Orange Hessonite Garnet, Oval, VS

7.9 x 6.5 mm

$ 27.75

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15.28ct Pink Strawberry Quartz, Oval, Translucent

15.28ct Pink Strawberry Quartz, Oval, Translucent

19.2 x 13.9 mm

$ 117.19

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12.63ct Yellow Rutile Quartz, Pear Shape, Transparent

12.63ct Yellow Rutile Quartz, Pear Shape, Transparent

21.6 x 10.9 mm

$ 48.44

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4.34ct Violet Amethyst, Pear Shape, VVS

4.34ct Violet Amethyst, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 31.52

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3.02ct Yellow Sillimanite, Oval, VS

3.02ct Yellow Sillimanite, Oval, VS

10 x 8 mm (calibrated)

$ 125.33

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0.42ct Orange Sphalerite, Round, SI

0.42ct Orange Sphalerite, Round, SI

4.3 mm

$ 20.92

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0.75ct Yellow Zircon, Oval, VVS

0.75ct Yellow Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 18.68

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3.92ctw White Rainbow Moonstone, Oval, Transparent

3.92ctw White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 66.72

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1.54ct Orange Hessonite Garnet, Cushion, VS-SI

1.54ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 24.09

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0.56ctw Brown Diamond, Round, VS-SI
Diamond Product Video (700078)

0.56ctw Brown Diamond, Round, VS-SI

4.3 mm

$ 745.22

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9.50ct Brown Tiger'S Eye, Oval, Opaque

9.50ct Brown Tiger'S Eye, Oval, Opaque

18.4 x 13.5 mm

$ 5.59

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1.38ct Brown Color-Change Garnet, Oval, VVS-VS

1.38ct Brown Color-Change Garnet, Oval, VVS-VS

7.2 x 5.9 mm

$ 110.25

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41.20ct White Rainbow Moonstone, Fancy, Opaque

41.20ct White Rainbow Moonstone, Fancy, Opaque

38.8 x 12.6 mm

$ 3.42

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4.90ctw Yellow Citrine, Oval, VVS

4.90ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 26.84

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!

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I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
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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
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All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

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