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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
Single
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1.04ct Orange Sunstone, Oval, Translucent

1.04ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 7.25

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2.92ctw Orange Hessonite Garnet, Emerald Cut, VS

2.92ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 44.62

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3.07ct Purple Kunzite, Pear Shape, VS

3.07ct Purple Kunzite, Pear Shape, VS

9.9 x 7.5 mm

$ 84.48

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18.58ct Multicolor Jasper, Pear Shape, Opaque

18.58ct Multicolor Jasper, Pear Shape, Opaque

31.3 x 14.4 mm

$ 30.54

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2.45ct Black Star Diopside, Oval, Opaque

2.45ct Black Star Diopside, Oval, Opaque

8 x 6 mm (calibrated)

$ 12.20

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2.47ct Blue Chalcedony, Oval, Transparent

2.47ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 4.92

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5.13ct Multicolor Pietersite, Pear Shape, Opaque

5.13ct Multicolor Pietersite, Pear Shape, Opaque

18 x 9.8 mm

$ 19.90

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2.34ct Yellow Citrine, Flower Cut, Transparent

2.34ct Yellow Citrine, Flower Cut, Transparent

8.5 x 8.3 mm

$ 17.94

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2.89ctw Red Rhodolite Garnet, Square, VS

2.89ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 25.30

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3.45ct Yellow Citrine, Emerald Cut, Transparent

3.45ct Yellow Citrine, Emerald Cut, Transparent

12 x 10 mm (calibrated)

$ 26.46

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21.21ctw Multicolor Labradorite, Pear Shape, Translucent

21.21ctw Multicolor Labradorite, Pear Shape, Translucent

22.1 x 16.1 mm

$ 42.25

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1.10ct Pink Tourmaline, Emerald Cut, VS-SI

1.10ct Pink Tourmaline, Emerald Cut, VS-SI

6.3 x 5.4 mm

$ 79.54

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0.06ct White Diamond, Marquise, VVS
Diamond Product Video (740691)

0.06ct White Diamond, Marquise, VVS

4 x 2 mm (calibrated)

$ 208.54

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10.91ct Multicolor Fire Agate, Fancy, Opaque

10.91ct Multicolor Fire Agate, Fancy, Opaque

19.9 x 10.6 mm

$ 65.74

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0.44ct Yellow Citrine, Heart, VVS

0.44ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.50

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11.84ctw White Topaz, Oval, VVS-VS

11.84ctw White Topaz, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 78.62

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1.08ct Pink Strawberry Quartz, Oval, Translucent

1.08ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 13.65

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11.18ctw Green Amazonite, Cushion, Opaque

11.18ctw Green Amazonite, Cushion, Opaque

10 x 10 mm (calibrated)

$ 27.19

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1.46ct Green Tourmaline, Cushion, VVS-VS

1.46ct Green Tourmaline, Cushion, VVS-VS

7.4 x 5.4 mm

$ 169.65

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8.60ct Multicolor Boulder Opal, Pear Shape, Opaque
Boulder Opal Product Video (321835)

8.60ct Multicolor Boulder Opal, Pear Shape, Opaque

18.9 x 12.5 mm

$ 65.95

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12.42ct Green Apatite, Emerald Cut, SI
Apatite Product Video (396051)

12.42ct Green Apatite, Emerald Cut, SI

13 x 13 mm (calibrated)

$ 272.15

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7.60ct Red Almandine Garnet, Emerald Cut, VVS-VS
Almandine Garnet Product Video (732551)

7.60ct Red Almandine Garnet, Emerald Cut, VVS-VS

14.5 x 8.3 mm

$ 227.09

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20.54ct White Howlite, Fancy, Opaque

20.54ct White Howlite, Fancy, Opaque

24.2 x 19.1 mm

$ 9.82

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11.50ct White Dendritic Agate, Pear Shape, Opaque

11.50ct White Dendritic Agate, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 9.16

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 -> 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

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

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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