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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
Untreated Gemstones Clarity
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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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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.44ct Green Peridot, Cushion, VS

1.44ct Green Peridot, Cushion, VS

8 x 6 mm (calibrated)

$ 23.66

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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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0.55ct Red Pyrope Garnet, Heart, VS

0.55ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 13.70

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7.40ctw Yellow Citrine, Oval, VVS-VS
Citrine Product Video (698589)

7.40ctw Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 51.59

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2.60ct Brown Rutile Quartz, Oval, Transparent

2.60ct Brown Rutile Quartz, Oval, Transparent

9.4 x 7.3 mm

$ 6.32

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1.45ct Green Tourmaline, Oval, Transparent

1.45ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 26.48

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3.67ct Green Malachite, Oval, Opaque

3.67ct Green Malachite, Oval, Opaque

14 x 10 mm (calibrated)

$ 3.65

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2.37ctw Red Pyrope Garnet, Marquise, VVS-VS

2.37ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 20.77

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2.17ct Orange Moonstone, Square, Translucent

2.17ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.34

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1.71ctw Red Pyrope Garnet, Marquise, VVS-VS

1.71ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5 mm

$ 14.99

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0.08ct Black Diamond, Square, Opaque
Diamond Product Video (677852)

0.08ct Black Diamond, Square, Opaque

2 x 2 mm (calibrated)

$ 31.54

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11.64ct Green Prehnite, Fancy, Translucent

11.64ct Green Prehnite, Fancy, Translucent

18.6 x 12.2 mm

$ 19.13

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7.49ctw White Topaz, Square, VVS

7.49ctw White Topaz, Square, VVS

5 x 5 mm (calibrated)

$ 62.52

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0.43ct Orange Spessartite Garnet, Oval, VS

0.43ct Orange Spessartite Garnet, Oval, VS

4.7 x 3.9 mm

$ 12.85

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26.42ct Gray Hematite, Square, Opaque

26.42ct Gray Hematite, Square, Opaque

17 x 17 mm (calibrated)

$ 25.75

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2.41ctw White Rainbow Moonstone, Oval, Transparent

2.41ctw White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 79.23

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1.99ct Pink Tourmaline, Emerald Cut, VS

1.99ct Pink Tourmaline, Emerald Cut, VS

13.2 x 4.3 mm

$ 152.62

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5.13ct Orange Sunstone, Round, Translucent

5.13ct Orange Sunstone, Round, Translucent

11 mm (calibrated)

$ 56.21

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0.54ctw Blue Kyanite, Round, VS-SI

0.54ctw Blue Kyanite, Round, VS-SI

3.8 mm

$ 9.68

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1.24ct Green Tourmaline, Emerald Cut, VS

1.24ct Green Tourmaline, Emerald Cut, VS

18.4 x 3 mm

$ 32.61

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27.24ct White Rainbow Moonstone, Oval, Transparent
Rainbow Moonstone Product Video (673566)

27.24ct White Rainbow Moonstone, Oval, Transparent

23.7 x 17.7 mm

$ 406.97

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2.35ctw Red Pyrope Garnet, Marquise, VVS-VS

2.35ctw Red Pyrope Garnet, Marquise, VVS-VS

9.8 x 5 mm

$ 20.60

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5.64ct Multicolor Fire Agate, Fancy, Opaque

5.64ct Multicolor Fire Agate, Fancy, Opaque

12 x 10 mm (calibrated)

$ 43.37

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5.17ctw Green Peridot, Round, VVS-VS
Peridot Product Video (489370)

5.17ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 77.24

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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

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
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

So far So good

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

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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