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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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6.00ct Multicolor Agate, Oval, Opaque

6.00ct Multicolor Agate, Oval, Opaque

11.7 x 11.1 mm

$ 5.98

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13.37ct Multicolor Opal, Oval, Transparent
Opal Product Video (752459)

13.37ct Multicolor Opal, Oval, Transparent

21.6 x 12.7 mm

$ 332.91

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65.58ct Violet Amethyst, Oval, VVS
Amethyst Product Video (724445)

65.58ct Violet Amethyst, Oval, VVS

30 x 22 mm (calibrated)

$ 491.19

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1.05ctw Orange Citrine, Marquise, VS

1.05ctw Orange Citrine, Marquise, VS

8.1 x 4.1 mm

$ 5.76

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17.77ct Violet Amethyst, Oval, VVS

17.77ct Violet Amethyst, Oval, VVS

20.4 x 16.7 mm

$ 123.89

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1.76ct Red Pyrope Garnet, Marquise, VVS-VS

1.76ct Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6.1 mm

$ 19.28

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10.90ct Purple Kunzite, Cushion, VS-SI
Kunzite Product Video (409928)

10.90ct Purple Kunzite, Cushion, VS-SI

15.4 x 11.1 mm

$ 308.71

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34.74ct Green Bloodstone, Oval, Opaque

34.74ct Green Bloodstone, Oval, Opaque

26.1 x 15.2 mm

$ 34.60

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4.83ctw White Topaz, Cushion, VVS-VS

4.83ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 26.46

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10.20ct Multicolor Quartz With Marcasite, Oval, Transparent

10.20ct Multicolor Quartz With Marcasite, Oval, Transparent

18 x 13 mm (calibrated)

$ 67.05

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23.44ctw Multicolor Jasper, Fancy, Opaque

23.44ctw Multicolor Jasper, Fancy, Opaque

25.5 x 15.8 mm

$ 13.78

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1.69ct Orange Moonstone, Square, Transparent

1.69ct Orange Moonstone, Square, Transparent

6 x 6 mm (calibrated)

$ 3.39

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1.24ct Purple Spinel, Cushion, VS

1.24ct Purple Spinel, Cushion, VS

7.1 x 6.5 mm

$ 123.50

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1.16ct Yellow Citrine, Trillion, VS

1.16ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 6.36

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33.89ctw Multicolor Fossil Coral, Oval, Opaque

33.89ctw Multicolor Fossil Coral, Oval, Opaque

21.5 x 14.2 mm

$ 55.69

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3.13ct Violet Amethyst, Trillion, VS

3.13ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 24.00

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2.19ctw Pink Strawberry Quartz, Round, Transparent

2.19ctw Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 19.19

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32.41ct White Dendritic Agate, Oval, Opaque

32.41ct White Dendritic Agate, Oval, Opaque

35.1 x 18.3 mm

$ 22.60

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2.65ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (387510)

2.65ctw Green Demantoid Garnet, Oval, VS

4.1 x 3.2 mm

$ 195.33

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39.31ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

39.31ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

34.1 x 23.7 mm

$ 39.15

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3.18ctw Red Pyrope Garnet, Trillion, VS

3.18ctw Red Pyrope Garnet, Trillion, VS

4 x 4 mm (calibrated)

$ 24.39

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3.07ct Blue Kyanite, Cushion, SI

3.07ct Blue Kyanite, Cushion, SI

11.2 x 7.2 mm

$ 76.44

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0.73ct Green Peridot, Oval, VS

0.73ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.09

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1.06ct Violet Amethyst, Square, VS

1.06ct Violet Amethyst, Square, VS

6 x 6 mm (calibrated)

$ 8.45

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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

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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