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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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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Violet Untreated Gemstones
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Yellow Untreated Gemstones
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16.93ct Violet Amethyst, Flower Cut, Translucent
Amethyst Product Video (595050)

16.93ct Violet Amethyst, Flower Cut, Translucent

17.3 x 16.5 mm

$ 55.64

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1.72ct Red Strawberry Quartz, Oval, Transparent

1.72ct Red Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 11.06

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2.00ct Orange Hessonite Garnet, Cushion, VS-SI

2.00ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 37.51

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16.04ct Multicolor Ruby-Zoisite, Pear Shape, Opaque

16.04ct Multicolor Ruby-Zoisite, Pear Shape, Opaque

19.8 x 14.4 mm

$ 43.93

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3.24ct Yellow Citrine, Pear Shape, VVS-VS

3.24ct Yellow Citrine, Pear Shape, VVS-VS

11 x 9 mm (calibrated)

$ 24.85

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2.13ct Orange Hessonite Garnet, Oval, VS-SI

2.13ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 36.84

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2.06ctw Yellow Golden Beryl, Oval, VS

2.06ctw Yellow Golden Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 56.42

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0.35ct Violet Iolite, Pear Shape, VS

0.35ct Violet Iolite, Pear Shape, VS

6 x 4 mm (calibrated)

$ 13.94

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7.20ctw Yellow Citrine, Oval, VVS-VS

7.20ctw Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 50.20

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3.06ct Yellow Citrine, Cushion, VVS-VS

3.06ct Yellow Citrine, Cushion, VVS-VS

11 x 7 mm

$ 23.46

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8.69ct Pink Strawberry Quartz, Oval, Translucent

8.69ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 66.64

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0.78ct Yellow Color-Change Diaspore, Marquise, VS

0.78ct Yellow Color-Change Diaspore, Marquise, VS

9.6 x 4.2 mm

$ 27.95

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25.71ct White Scolecite, Oval, Opaque

25.71ct White Scolecite, Oval, Opaque

27.1 x 21.8 mm

$ 30.69

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1.19ctw Red Pyrope Garnet, Heart, VS

1.19ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 29.63

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22.48ctw Multicolor Fossil Coral, Cushion, Opaque

22.48ctw Multicolor Fossil Coral, Cushion, Opaque

16 x 12 mm (calibrated)

$ 44.33

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0.73ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

0.73ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

6.6 x 4.5 mm

$ 27.12

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21.94ct Green Druzy Variscite, Oval, Opaque

21.94ct Green Druzy Variscite, Oval, Opaque

32.7 x 19 mm

$ 22.51

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2.04ct Pink Tourmaline, Emerald Cut, VS

2.04ct Pink Tourmaline, Emerald Cut, VS

7.5 x 7.5 mm

$ 237.05

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1.70ct Green Tourmaline, Emerald Cut, VVS

1.70ct Green Tourmaline, Emerald Cut, VVS

20.8 x 3.2 mm

$ 46.56

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1.40ct Yellow Citrine, Emerald Cut, VS

1.40ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 11.16

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2.50ct Yellow Citrine, Trillion, VVS-VS

2.50ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 19.17

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0.92ct Green Peridot, Oval, VS

0.92ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.42

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4.02ctw Yellow Sillimanite, Oval, VVS

4.02ctw Yellow Sillimanite, Oval, VVS

9.6 x 7.6 mm

$ 90.37

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7.77ct Brown Smoky Quartz, Round, VVS-VS

7.77ct Brown Smoky Quartz, Round, VVS-VS

14 mm (calibrated)

$ 19.36

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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

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

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

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

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 -> 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
→ View All GemSelect Reviews on Bizrate
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