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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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0.76ct Yellow Citrine, Pear Shape, VVS

0.76ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.78

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1.65ct Orange Moonstone, Square, Translucent

1.65ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.30

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1.35ct Violet Spinel, Cushion, VS

1.35ct Violet Spinel, Cushion, VS

6.3 x 6.2 mm

$ 101.76

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4.60ct Multicolor Fire Agate, Fancy, Opaque

4.60ct Multicolor Fire Agate, Fancy, Opaque

13.6 x 8.4 mm

$ 35.37

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1.86ct Green Sphene, Oval, Transparent

1.86ct Green Sphene, Oval, Transparent

7.6 x 6.8 mm

$ 9.26

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3.70ct Pink Strawberry Quartz, Round, Translucent

3.70ct Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 20.27

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1.27ct Pink Strawberry Quartz, Oval, Transparent

1.27ct Pink Strawberry Quartz, Oval, Transparent

8.1 x 6.3 mm

$ 6.34

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1.37ctw White Rainbow Moonstone, Pear Shape, Transparent

1.37ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 25.51

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5.28ct Yellow Citrine, Round, VS

5.28ct Yellow Citrine, Round, VS

12 mm (calibrated)

$ 46.27

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2.51ctw Red Pyrope Garnet, Square, VS

2.51ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 19.26

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1.02ct Orange Hessonite Garnet, Baguette, VS

1.02ct Orange Hessonite Garnet, Baguette, VS

6.1 x 4.3 mm

$ 19.26

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24.75ct Brown Moonstone, Oval, Opaque

24.75ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 49.30

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1.26ct Blue Kyanite, Oval, VS-SI

1.26ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 27.61

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1.48ct Orange Zircon, Oval, VVS

1.48ct Orange Zircon, Oval, VVS

8 x 6 mm (calibrated)

$ 40.54

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4.60ctw Green Peridot, Round, VVS-VS

4.60ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 63.00

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8.10ct Brown Tiger'S Eye, Oval, Opaque

8.10ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 8.07

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12.39ct Blue Aquamarine, Oval, Translucent

12.39ct Blue Aquamarine, Oval, Translucent

18 x 13 mm (calibrated)

$ 257.09

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0.90ct Yellow Color-Change Diaspore, Cushion, VS

0.90ct Yellow Color-Change Diaspore, Cushion, VS

11.1 x 4.1 mm

$ 26.29

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2.02ctw Multicolor Andalusite, Round, VS

2.02ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 107.92

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2.49ctw Red Pyrope Garnet, Square, VVS-VS

2.49ctw Red Pyrope Garnet, Square, VVS-VS

6 x 6 mm (calibrated)

$ 19.09

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31.80ctw Multicolor Fossil Coral, Oval, Opaque

31.80ctw Multicolor Fossil Coral, Oval, Opaque

25.2 x 13.9 mm

$ 68.98

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28.42ct Gray Hematite, Pear Shape, Opaque

28.42ct Gray Hematite, Pear Shape, Opaque

24.1 x 17.1 mm

$ 27.71

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1.53ct Green Tourmaline, Cushion, VS

1.53ct Green Tourmaline, Cushion, VS

7.8 x 6.5 mm

$ 177.79

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2.58ctw Pink Strawberry Quartz, Round, Translucent

2.58ctw Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 25.86

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 -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate
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