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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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Yellow Untreated Gemstones
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27.98ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

27.98ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

18.9 x 16.5 mm

$ 27.87

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10.44ct Brown Tiger'S Eye, Oval, Opaque

10.44ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 10.40

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9.17ctw Violet Amethyst, Oval, Transparent

9.17ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 50.24

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0.29ct Violet Iolite, Emerald Cut, VS

0.29ct Violet Iolite, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 11.55

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2.55ctw Violet Amethyst, Oval, VVS-VS

2.55ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.98

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26.57ct White Rainbow Moonstone, Oval, Translucent

26.57ct White Rainbow Moonstone, Oval, Translucent

23.8 x 17.8 mm

$ 26.46

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66.10ct Violet Amethyst, Pear Shape, VVS-VS
Amethyst Product Video (724432)

66.10ct Violet Amethyst, Pear Shape, VVS-VS

33 x 24.3 mm

$ 495.08

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1.31ct Yellow Color-Change Diaspore, Cushion, VS

1.31ct Yellow Color-Change Diaspore, Cushion, VS

7 x 5.4 mm

$ 68.56

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1.60ct White Topaz, Marquise, VVS-VS

1.60ct White Topaz, Marquise, VVS-VS

11.8 x 5 mm

$ 11.16

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47.04ct Orange Druzy Citrine, Square, Opaque

47.04ct Orange Druzy Citrine, Square, Opaque

21.9 x 21.7 mm

$ 48.80

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2.15ct Yellow Citrine, Trillion, VVS-VS

2.15ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 11.64

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13.73ct Multicolor Quartz With Hedenbergite, Oval, Transparent

13.73ct Multicolor Quartz With Hedenbergite, Oval, Transparent

18.9 x 12.9 mm

$ 56.42

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0.81ct Green Peridot, Oval, VS

0.81ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.64

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6.26ct White Rose Quartz, Flower Cut, Transparent

6.26ct White Rose Quartz, Flower Cut, Transparent

13 x 13 mm (calibrated)

$ 12.47

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8.00ct Green Malachite, Oval, Opaque

8.00ct Green Malachite, Oval, Opaque

13.4 x 10.2 mm

$ 6.13

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0.89ct Yellow Beryl, Oval, VVS

0.89ct Yellow Beryl, Oval, VVS

7 x 5 mm (calibrated)

$ 17.73

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3.70ct Pink Rose Quartz, Emerald Cut, Transparent

3.70ct Pink Rose Quartz, Emerald Cut, Transparent

9.6 x 9.5 mm

$ 20.27

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1.03ct Pink Tourmaline, Round, Transparent

1.03ct Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 17.07

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0.72ct Green Peridot, Oval, VVS-VS

0.72ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.02

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16.66ct Purple Ruby-Zoisite, Flower Cut, Opaque

16.66ct Purple Ruby-Zoisite, Flower Cut, Opaque

16 x 16 mm (calibrated)

$ 20.25

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10.84ctw Yellow Citrine, Oval, VVS-VS

10.84ctw Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 65.08

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4.58ctw Purple Rhodolite Garnet, Trillion, VS

4.58ctw Purple Rhodolite Garnet, Trillion, VS

5.2 x 5.1 mm

$ 40.14

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3.46ct Yellow Rutile Topaz, Pear Shape, Transparent
Rutile Topaz Product Video (753650)

3.46ct Yellow Rutile Topaz, Pear Shape, Transparent

12.8 x 7.6 mm

$ 71.80

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15.86ctw Multicolor Jasper, Pear Shape, Opaque

15.86ctw Multicolor Jasper, Pear Shape, Opaque

20.9 x 12 mm

$ 9.32

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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

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 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 -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 2025
Source: Bizrate
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