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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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0.21ct Pink Morganite, Round, VVS-VS

0.21ct Pink Morganite, Round, VVS-VS

4 mm (calibrated)

$ 8.72

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1.70ct Orange Hessonite Garnet, Oval, VS-SI

1.70ct Orange Hessonite Garnet, Oval, VS-SI

8.1 x 6.7 mm

$ 27.94

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2.51ct White Cat'S Eye Moonstone, Round, Translucent

2.51ct White Cat'S Eye Moonstone, Round, Translucent

8 mm (calibrated)

$ 11.00

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6.80ctw Pink Strawberry Quartz, Oval, Transparent

6.80ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 51.00

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0.34ct Brown Chocolate Opal, Oval, Transparent

0.34ct Brown Chocolate Opal, Oval, Transparent

6.6 x 4.8 mm

$ 10.16

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1.89ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

1.89ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 5.96

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2.10ctw Pink Strawberry Quartz, Round, Transparent

2.10ctw Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 32.21

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1.67ct Violet Amethyst, Pear Shape, VS

1.67ct Violet Amethyst, Pear Shape, VS

10 x 7 mm (calibrated)

$ 10.97

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9.47ct Yellow Rutile Quartz, Round, Transparent

9.47ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 32.88

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0.24ct Yellow Color-Change Sapphire, Baguette, VVS-VS

0.24ct Yellow Color-Change Sapphire, Baguette, VVS-VS

4.2 x 2.8 mm

$ 19.92

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1.09ct Orange Hessonite Garnet, Baguette, VS

1.09ct Orange Hessonite Garnet, Baguette, VS

6.6 x 4.5 mm

$ 20.58

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25.29ctw Multicolor Pietersite, Oval, Opaque

25.29ctw Multicolor Pietersite, Oval, Opaque

20 x 15 mm (calibrated)

$ 83.12

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5.70ct Green Prehnite, Fancy, Translucent

5.70ct Green Prehnite, Fancy, Translucent

17 x 10.2 mm

$ 9.37

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6.16ct Green Druzy Variscite, Fancy, Opaque

6.16ct Green Druzy Variscite, Fancy, Opaque

24.1 x 9.1 mm

$ 6.32

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15.83ctw Brown Tiger'S Eye, Baguette, Opaque

15.83ctw Brown Tiger'S Eye, Baguette, Opaque

14.3 x 10.5 mm

$ 15.77

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41.13ct Multicolor Jasper, Trillion, Opaque

41.13ct Multicolor Jasper, Trillion, Opaque

38.5 x 29 mm

$ 17.20

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0.69ct Green Peridot, Marquise, VVS-VS

0.69ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 11.00

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1.82ctw Orange Hessonite Garnet, Square, VS

1.82ctw Orange Hessonite Garnet, Square, VS

3.5 x 3.5 mm

$ 38.71

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1.35ct Green Tourmaline, Emerald Cut, VVS-VS

1.35ct Green Tourmaline, Emerald Cut, VVS-VS

18.3 x 3.4 mm

$ 28.55

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4.94ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (460078)

4.94ct Violet Amethyst, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 37.89

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1.57ct Yellow Citrine, Emerald Cut, VVS

1.57ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.51

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1.89ctw Orange Sunstone, Oval, Translucent

1.89ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 13.18

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2.16ctw Green Tsavorite Garnet, Oval, VS

2.16ctw Green Tsavorite Garnet, Oval, VS

5 x 3 mm (calibrated)

$ 118.32

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1.08ct Purple Spinel, Cushion, VVS

1.08ct Purple Spinel, Cushion, VVS

6.7 x 5.6 mm

$ 59.16

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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

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy 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 -> 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

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 -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

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