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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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5.14ct Multicolor Rainbow Pyrite, Square, Opaque

5.14ct Multicolor Rainbow Pyrite, Square, Opaque

11.2 x 9.8 mm

$ 13.30

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0.83ct Orange Fire Opal, Oval, Translucent

0.83ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 18.95

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5.11ctw Yellow Citrine, Oval, VVS-VS

5.11ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 39.19

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5.27ctw Purple Rhodolite Garnet, Oval, VS

5.27ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 112.07

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2.49ct Brown Smoky Quartz, Marquise, VVS

2.49ct Brown Smoky Quartz, Marquise, VVS

12.9 x 8 mm

$ 9.50

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1.43ct Green Tourmaline, Oval, VS
Tourmaline Product Video (729880)

1.43ct Green Tourmaline, Oval, VS

8 x 6.7 mm

$ 166.17

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25.15ct Multicolor Rhodonite, Pear Shape, Opaque

25.15ct Multicolor Rhodonite, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 12.11

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6.32ct Violet Amethyst, Oval, Transparent

6.32ct Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 20.83

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26.87ct Multicolor Pietersite, Round, Opaque
Pietersite Product Video (650670)

26.87ct Multicolor Pietersite, Round, Opaque

28.4 mm

$ 62.89

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31.73ct Green Jadeite, Fancy, Translucent

31.73ct Green Jadeite, Fancy, Translucent

39.8 x 15.9 mm

$ 41.40

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28.66ct Brown Smoky Quartz, Oval, Transparent
Smoky Quartz Product Video (501534)

28.66ct Brown Smoky Quartz, Oval, Transparent

31.5 x 19.2 mm

$ 74.73

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0.93ct Orange Sunstone, Oval, Translucent

0.93ct Orange Sunstone, Oval, Translucent

7.8 x 6.3 mm

$ 6.48

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0.53ct Yellow Sphalerite, Round, SI

0.53ct Yellow Sphalerite, Round, SI

4.5 mm (calibrated)

$ 26.39

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0.19ctw Blue Iolite, Square, VS

0.19ctw Blue Iolite, Square, VS

2.6 x 2.6 mm

$ 7.57

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2.38ctw Orange Zircon, Round, VVS-VS
Zircon Product Video (460279)

2.38ctw Orange Zircon, Round, VVS-VS

4.5 mm (calibrated)

$ 46.21

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2.57ctw Red Pyrope Garnet, Square, VS

2.57ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 19.71

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25.54ctw Brown Rutile Quartz, Sphere / Ball, Transparent

25.54ctw Brown Rutile Quartz, Sphere / Ball, Transparent

11 mm (calibrated)

$ 27.98

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1.57ct Pink Tourmaline, Emerald Cut, VS-SI

1.57ct Pink Tourmaline, Emerald Cut, VS-SI

12.3 x 4.2 mm

$ 98.90

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0.96ct Pink Strawberry Quartz, Oval, Transparent

0.96ct Pink Strawberry Quartz, Oval, Transparent

8 x 6 mm (calibrated)

$ 12.14

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1.27ct Pink Strawberry Quartz, Oval, Translucent

1.27ct Pink Strawberry Quartz, Oval, Translucent

7 x 5 mm (calibrated)

$ 6.34

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4.97ctw Yellow Citrine, Oval, VVS-VS

4.97ctw Yellow Citrine, Oval, VVS-VS

14.1 x 7.1 mm

$ 38.11

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47.70ct Multicolor Jasper, Fancy, Opaque

47.70ct Multicolor Jasper, Fancy, Opaque

32.8 x 22.5 mm

$ 52.26

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11.22ctw Violet Amethyst, Cushion, VS

11.22ctw Violet Amethyst, Cushion, VS

15.3 x 9.2 mm

$ 55.88

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1.60ct Red Strawberry Quartz, Oval, Transparent

1.60ct Red Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 12.35

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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

Easy to use website

Posted By Mel in February, 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

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

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