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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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1.18ct Pink Tourmaline, Round, Transparent

1.18ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 47.01

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4.25ct Yellow Citrine, Pear Shape, VVS

4.25ct Yellow Citrine, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 29.63

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0.91ct Violet Amethyst, Marquise, VVS

0.91ct Violet Amethyst, Marquise, VVS

10 x 5 mm (calibrated)

$ 6.04

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2.18ctw Orange Sunstone, Oval, Translucent

2.18ctw Orange Sunstone, Oval, Translucent

8.2 x 6.3 mm

$ 15.20

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2.95ct Pink Morganite, Trillion, Transparent

2.95ct Pink Morganite, Trillion, Transparent

10 x 10 mm (calibrated)

$ 32.32

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3.55ct Red Almandine Garnet, Pear Shape, VS

3.55ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 132.59

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1.98ct Pink Strawberry Quartz, Round, Translucent

1.98ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 15.19

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3.65ct Pink Strawberry Quartz, Oval, Translucent

3.65ct Pink Strawberry Quartz, Oval, Translucent

11.7 x 9.4 mm

$ 43.62

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2.18ct Orange Hessonite Garnet, Oval, VS-SI

2.18ct Orange Hessonite Garnet, Oval, VS-SI

8.6 x 7.1 mm

$ 39.14

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25.17ct Multicolor Jasper, Pear Shape, Opaque

25.17ct Multicolor Jasper, Pear Shape, Opaque

28 x 23 mm

$ 27.58

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0.83ct Pink Morganite, Pear Shape, VVS-VS

0.83ct Pink Morganite, Pear Shape, VVS-VS

8.6 x 5 mm

$ 72.75

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5.10ctw Pink Strawberry Quartz, Oval, Transparent

5.10ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 37.90

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2.76ct Yellow Citrine, Oval, VVS-VS

2.76ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 21.17

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1.94ct Yellow Beryl, Round, VVS

1.94ct Yellow Beryl, Round, VVS

9 mm (calibrated)

$ 38.64

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1.53ct Green Tourmaline, Oval, Transparent

1.53ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 25.36

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37.83ct Black Obsidian, Pear Shape, Opaque

37.83ct Black Obsidian, Pear Shape, Opaque

33.1 x 23.5 mm

$ 41.44

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1.51ctw Yellow Citrine, Heart, VVS-VS

1.51ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 10.52

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79.22ct Multicolor Jasper, Oval, Opaque

79.22ct Multicolor Jasper, Oval, Opaque

45.3 x 25.8 mm

$ 45.77

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4.11ctw Red Pyrope Garnet, Square, VS

4.11ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 31.52

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1.74ct Green Tourmaline, Cushion, VS

1.74ct Green Tourmaline, Cushion, VS

7.6 x 6.3 mm

$ 202.19

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4.81ct Brown Pietersite, Marquise, Opaque

4.81ct Brown Pietersite, Marquise, Opaque

19.4 x 7.3 mm

$ 11.79

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0.46ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

0.46ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

4.4 x 4.2 mm

$ 13.74

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33.09ct Gray Obsidian, Oval, Opaque

33.09ct Gray Obsidian, Oval, Opaque

38.6 x 19.2 mm

$ 26.10

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14.82ct Multicolor Cinnabar, Cushion, Opaque

14.82ct Multicolor Cinnabar, Cushion, Opaque

21.1 x 15.7 mm

$ 17.35

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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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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