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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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3.88ct Yellow Citrine, Emerald Cut, VVS-VS

3.88ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 29.76

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3.35ctw Orange Hessonite Garnet, Oval, VS-SI
Hessonite Garnet Product Video (541531)

3.35ctw Orange Hessonite Garnet, Oval, VS-SI

8 x 6.6 mm

$ 55.87

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8.55ct Pink Rose Quartz, Emerald Cut, Transparent

8.55ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 46.85

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5.72ct Pink Strawberry Quartz, Oval, Translucent

5.72ct Pink Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 34.35

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0.65ctw Yellow Demantoid Garnet, Oval, VVS-VS
Demantoid Garnet Product Video (284165)

0.65ctw Yellow Demantoid Garnet, Oval, VVS-VS

4.7 x 3.5 mm

$ 178.04

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5.84ct Yellow Citrine, Briolette, VVS-VS

5.84ct Yellow Citrine, Briolette, VVS-VS

15.1 x 8.2 mm

$ 32.69

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13.67ctw Violet Amethyst, Oval, Transparent

13.67ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 74.89

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4.23ct Green Fluorite, Oval, Transparent

4.23ct Green Fluorite, Oval, Transparent

11 x 8.6 mm

$ 18.53

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13.80ct Green Hiddenite, Pear Shape, VS-SI
Hiddenite Product Video (706352)

13.80ct Green Hiddenite, Pear Shape, VS-SI

16.9 x 12 mm

$ 342.52

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0.91ct Yellow Beryl, Trillion, VVS

0.91ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 18.13

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0.89ct Green Peridot, Oval, VS

0.89ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.21

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0.83ct Green Peridot, Oval, VVS-VS

0.83ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.79

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6.20ctw Green Prehnite, Pear Shape, Transparent/Translucent

6.20ctw Green Prehnite, Pear Shape, Transparent/Translucent

12 x 6.8 mm

$ 19.02

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22.52ct White Rainbow Moonstone, Fancy, Transparent

22.52ct White Rainbow Moonstone, Fancy, Transparent

27.3 x 15.6 mm

$ 179.44

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0.83ct Blue Kyanite, Round, SI

0.83ct Blue Kyanite, Round, SI

5.3 mm

$ 20.67

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30.10ct Yellow Obsidian, Cushion, Opaque

30.10ct Yellow Obsidian, Cushion, Opaque

26.8 x 20.8 mm

$ 32.98

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1.69ct Green Tourmaline, Emerald Cut, VVS-VS

1.69ct Green Tourmaline, Emerald Cut, VVS-VS

20.7 x 3.4 mm

$ 37.12

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1.22ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

1.22ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

13 x 4.4 mm

$ 64.40

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1.79ct Pink Strawberry Quartz, Round, Translucent

1.79ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.73

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1.59ct Orange Hessonite Garnet, Round, VS

1.59ct Orange Hessonite Garnet, Round, VS

7 mm (calibrated)

$ 29.61

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1.56ctw Red Pyrope Garnet, Heart, VVS-VS

1.56ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 11.96

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0.50ct Yellow Citrine, Cushion, VS

0.50ct Yellow Citrine, Cushion, VS

4.8 x 4.8 mm

$ 3.49

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27.08ct Multicolor Rhodochrosite, Fancy, Translucent

27.08ct Multicolor Rhodochrosite, Fancy, Translucent

29.7 x 14.9 mm

$ 32.34

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1.21ct Yellow Citrine, Square, VVS-VS

1.21ct Yellow Citrine, Square, VVS-VS

5.8 x 5.7 mm

$ 8.43

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

Web site is very simple to navigate Selection is terrific

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

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

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