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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
Single
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3.46ctw Violet Amethyst, Oval, Transparent

3.46ctw Violet Amethyst, Oval, Transparent

12.1 x 6 mm

$ 24.12

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20.25ct Multicolor Opal, Pear Shape, Opaque
Opal Product Video (752466)

20.25ct Multicolor Opal, Pear Shape, Opaque

25.9 x 14 mm

$ 504.23

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0.65ct Pink Morganite, Pear Shape, VS

0.65ct Pink Morganite, Pear Shape, VS

7.4 x 5.2 mm

$ 29.13

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17.84ct Multicolor Jasper, Fancy, Opaque

17.84ct Multicolor Jasper, Fancy, Opaque

34.6 x 14.7 mm

$ 23.46

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19.58ct Purple Ruby-Zoisite, Flower Cut, Opaque

19.58ct Purple Ruby-Zoisite, Flower Cut, Opaque

14.8 x 14.1 mm

$ 23.80

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30.49ct White Howlite, Oval, Opaque

30.49ct White Howlite, Oval, Opaque

31.6 x 22.6 mm

$ 15.19

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12.29ctw Green Aventurine, Trillion, Translucent

12.29ctw Green Aventurine, Trillion, Translucent

17.8 x 11.7 mm

$ 28.40

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30.55ctw Multicolor Fossil Coral, Cushion, Opaque

30.55ctw Multicolor Fossil Coral, Cushion, Opaque

16 x 16 mm (calibrated)

$ 39.50

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5.53ct Brown Smoky Quartz, Emerald Cut, VVS-VS

5.53ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13.1 x 10.1 mm

$ 24.24

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8.06ctw Pink Strawberry Quartz, Oval, Transparent

8.06ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 123.62

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2.04ct Multicolor Tourmaline, Emerald Cut, VVS
Tourmaline Product Video (744060)

2.04ct Multicolor Tourmaline, Emerald Cut, VVS

8.4 x 5.9 mm

$ 457.16

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3.86ctw Orange Moonstone, Trillion, Translucent

3.86ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.69

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2.40ct Green Prehnite, Oval, Transparent

2.40ct Green Prehnite, Oval, Transparent

7.8 x 7.2 mm

$ 12.91

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1.29ct Green Tourmaline, Round, Transparent

1.29ct Green Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 22.11

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1.91ct Orange Hessonite Garnet, Cushion, VS-SI

1.91ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 28.47

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4.35ctw Yellow Citrine, Oval, VVS-VS

4.35ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 23.84

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1.84ct Orange Moonstone, Cushion, Translucent

1.84ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 3.67

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11.03ct Brown Smoky Quartz, Emerald Cut, VVS

11.03ct Brown Smoky Quartz, Emerald Cut, VVS

14 x 14 mm (calibrated)

$ 21.62

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11.70ct Turquoise Chrysocolla, Oval, Opaque

11.70ct Turquoise Chrysocolla, Oval, Opaque

19.7 x 13 mm

$ 16.03

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0.84ct Yellow Citrine, Marquise, VS

0.84ct Yellow Citrine, Marquise, VS

9.1 x 5 mm

$ 6.69

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0.85ct Green Peridot, Oval, VVS-VS

0.85ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 11.85

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1.52ct Multicolor Opal, Oval, Transparent

1.52ct Multicolor Opal, Oval, Transparent

11.1 x 8.2 mm

$ 37.85

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21.82ct Violet Amethyst, Emerald Cut, VVS

21.82ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 152.13

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14.56ctw Green Amazonite, Marquise, Opaque

14.56ctw Green Amazonite, Marquise, Opaque

18.3 x 9.2 mm

$ 11.60

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 -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 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

Web site is very simple to navigate Selection is terrific

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

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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