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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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49.84ct Green Aragonite, Baguette, Opaque

49.84ct Green Aragonite, Baguette, Opaque

26.4 x 22.8 mm

$ 58.32

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1.06ct Yellow Citrine, Emerald Cut, VVS-VS

1.06ct Yellow Citrine, Emerald Cut, VVS-VS

11.8 x 3.9 mm

$ 8.45

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25.13ct Gray Hematite, Square, Opaque

25.13ct Gray Hematite, Square, Opaque

15 x 15 mm (calibrated)

$ 24.51

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1.04ct Red Rhodolite Garnet, Oval, VVS-VS

1.04ct Red Rhodolite Garnet, Oval, VVS-VS

6.5 x 5 mm

$ 27.62

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0.70ct Yellow Zircon, Oval, VVS-VS

0.70ct Yellow Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 17.43

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3.51ctw Pink Strawberry Quartz, Round, Transparent

3.51ctw Pink Strawberry Quartz, Round, Transparent

8 mm (calibrated)

$ 53.83

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7.50ct Yellow Rutile Quartz, Round, Transparent

7.50ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 32.87

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13.33ct Green Malachite, Baguette, Opaque

13.33ct Green Malachite, Baguette, Opaque

12.5 x 10.8 mm

$ 15.92

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0.91ct Orange Citrine, Heart, VS

0.91ct Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 7.55

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4.47ctw Green Prehnite, Pear Shape, Transparent

4.47ctw Green Prehnite, Pear Shape, Transparent

10.3 x 6.7 mm

$ 24.49

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16.71ct Multicolor Pietersite, Oval, Opaque

16.71ct Multicolor Pietersite, Oval, Opaque

22.6 x 16.5 mm

$ 40.94

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1.65ct Orange Hessonite Garnet, Oval, VVS-VS

1.65ct Orange Hessonite Garnet, Oval, VVS-VS

7.6 x 6.4 mm

$ 32.87

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8.51ct Brown Star Moonstone, Oval, Translucent

8.51ct Brown Star Moonstone, Oval, Translucent

12.7 x 10.2 mm

$ 27.97

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6.79ct Pink Rose Quartz, Emerald Cut, Transparent

6.79ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 37.20

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1.25ct Orange Fire Opal, Oval, Transparent
Fire Opal Product Video (673874)

1.25ct Orange Fire Opal, Oval, Transparent

9.4 x 6.8 mm

$ 43.58

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7.34ctw Pink Strawberry Quartz, Round, Translucent
Strawberry Quartz Product Video (608484)

7.34ctw Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 112.59

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4.72ct Brown Smoky Quartz, Round, VS

4.72ct Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 14.10

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0.23ct Black Diamond, Round, Opaque

0.23ct Black Diamond, Round, Opaque

3.5 mm (calibrated)

$ 109.41

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43.74ct Multicolor Coral, Oval, Opaque

43.74ct Multicolor Coral, Oval, Opaque

33.6 x 23.9 mm

$ 47.92

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0.72ct Green Peridot, Oval, VS

0.72ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.02

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1.53ct Green Tourmaline, Oval, Transparent

1.53ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 19.51

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2.21ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.21ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 36.46

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1.50ct Orange Hessonite Garnet, Round, SI

1.50ct Orange Hessonite Garnet, Round, SI

6.5 mm (calibrated)

$ 27.94

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28.24ct Brown Tiger'S Eye, Fancy, Opaque

28.24ct Brown Tiger'S Eye, Fancy, Opaque

36.9 x 10 mm

$ 8.43

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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

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

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

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

Posted By KT in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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