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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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Bi-color Untreated Gemstones
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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3.68ct Yellow Rutile Quartz, Oval, Transparent

3.68ct Yellow Rutile Quartz, Oval, Transparent

12 x 8 mm (calibrated)

$ 10.08

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24.02ct Multicolor Jasper, Trillion, Opaque

24.02ct Multicolor Jasper, Trillion, Opaque

25 x 24.4 mm

$ 13.64

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1.04ctw Red Pyrope Garnet, Square, VVS-VS

1.04ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 7.98

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6.51ct Violet Amethyst, Pear Shape, VS

6.51ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 45.38

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0.91ct Green Tourmaline, Emerald Cut, VVS-VS

0.91ct Green Tourmaline, Emerald Cut, VVS-VS

14.1 x 3.1 mm

$ 22.66

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62.88ct Multicolor Jasper, Oval, Opaque

62.88ct Multicolor Jasper, Oval, Opaque

45.3 x 30.7 mm

$ 36.32

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1.88ct Pink Strawberry Quartz, Oval, Translucent

1.88ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 9.40

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0.90ctw Green Peridot, Pear Shape, VVS-VS

0.90ctw Green Peridot, Pear Shape, VVS-VS

6 x 4.2 mm

$ 7.89

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1.22ct Pink Morganite, Oval, VVS-VS

1.22ct Pink Morganite, Oval, VVS-VS

8.4 x 6.3 mm

$ 53.47

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4.42ct Red Rhodolite Garnet, Heart, VS

4.42ct Red Rhodolite Garnet, Heart, VS

11 x 9 mm (calibrated)

$ 183.43

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2.91ct Violet Amethyst, Trillion, VS

2.91ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.32

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1.09ct Green Peridot, Emerald Cut, VS

1.09ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 17.37

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2.87ctw Yellow Citrine, Emerald Cut, VVS-VS

2.87ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 22.87

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1.49ct Yellow Beryl, Oval, VVS

1.49ct Yellow Beryl, Oval, VVS

9.1 x 6.7 mm

$ 29.68

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0.38ct Yellow Color-Change Diaspore, Oval, VS

0.38ct Yellow Color-Change Diaspore, Oval, VS

4.9 x 3.7 mm

$ 20.06

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6.65ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

6.65ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

16.9 x 7.5 mm

$ 49.10

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87.70ct Violet Charoite, Cushion, Opaque
Charoite Product Video (344684)

87.70ct Violet Charoite, Cushion, Opaque

31 x 27.3 mm

$ 144.13

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29.67ct Violet Amethyst, Oval, IF

29.67ct Violet Amethyst, Oval, IF

21.3 x 15.3 mm

$ 227.54

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21.88ct Brown Star Sunstone, Oval, Opaque

21.88ct Brown Star Sunstone, Oval, Opaque

16.6 x 14.7 mm

$ 181.60

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0.90ct Yellow Citrine, Square, VVS-VS

0.90ct Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 6.27

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0.82ct Multicolor Opal, Oval, Transparent

0.82ct Multicolor Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 18.67

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1.53ct Yellow Beryl, Round, VVS

1.53ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 30.48

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2.32ct Orange Hessonite Garnet, Cushion, VS-SI

2.32ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 39.53

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8.20ct Violet Kunzite, Trillion, VS
Kunzite Product Video (410588)

8.20ct Violet Kunzite, Trillion, VS

15.9 x 11.4 mm

$ 231.34

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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 -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate
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