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Home › Gemstones › Natural Untreated Gemstones

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
Single
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4.03ct Multicolor Fire Agate, Trillion, Translucent

4.03ct Multicolor Fire Agate, Trillion, Translucent

12.5 x 10.9 mm

$ 35.06

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10.74ct Multicolor Agate, Fancy, Opaque

10.74ct Multicolor Agate, Fancy, Opaque

11.6 x 11.6 mm

$ 10.16

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7.27ct Yellow Apatite, Oval, VS
Apatite Product Video (407293)

7.27ct Yellow Apatite, Oval, VS

14.9 x 11.3 mm

$ 238.95

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4.71ct Yellow Citrine, Oval, VS-SI

4.71ct Yellow Citrine, Oval, VS-SI

12 x 10 mm (calibrated)

$ 36.12

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6.93ct White Rainbow Moonstone, Pear Shape, Translucent

6.93ct White Rainbow Moonstone, Pear Shape, Translucent

15.7 x 10.4 mm

$ 48.31

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0.30ct Violet Amethyst, Emerald Cut, VS

0.30ct Violet Amethyst, Emerald Cut, VS

5.1 x 3.1 mm

$ 1.74

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2.65ctw Green Peridot, Round, VVS-VS

2.65ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 43.56

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1.40ct Orange Moonstone, Round, Translucent

1.40ct Orange Moonstone, Round, Translucent

7 mm (calibrated)

$ 2.80

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7.71ct Pink Rose Quartz, Emerald Cut, Transparent

7.71ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 42.24

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34.12ctw Multicolor Pietersite, Round, Opaque

34.12ctw Multicolor Pietersite, Round, Opaque

18 mm (calibrated)

$ 80.38

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4.63ct Yellow Citrine, Oval, VVS

4.63ct Yellow Citrine, Oval, VVS

13.8 x 10.3 mm

$ 35.51

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1.14ct Green Peridot, Cushion, VS

1.14ct Green Peridot, Cushion, VS

8 x 6 mm (calibrated)

$ 18.73

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1.13ct Orange Moonstone, Cushion, Translucent

1.13ct Orange Moonstone, Cushion, Translucent

6 x 6 mm (calibrated)

$ 2.26

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0.93ct Multicolor Opal, Oval, Transparent

0.93ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 29.25

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1.40ct Green Tourmaline, Emerald Cut, VS

1.40ct Green Tourmaline, Emerald Cut, VS

19.7 x 3 mm

$ 33.75

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1.50ctw Red Rhodolite Garnet, Square, VS

1.50ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.13

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1.28ct Purple Spinel, Cushion, VVS

1.28ct Purple Spinel, Cushion, VVS

6.9 x 6.6 mm

$ 127.49

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9.61ct Multicolor Labradorite, Pear Shape, Translucent

9.61ct Multicolor Labradorite, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 21.25

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0.93ct Purple Spinel, Cushion, VS

0.93ct Purple Spinel, Cushion, VS

5.7 x 5.1 mm

$ 46.75

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2.60ctw Green Kornerupine, Oval, VVS-VS

2.60ctw Green Kornerupine, Oval, VVS-VS

6.5 x 5 mm

$ 113.94

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3.96ctw White Topaz, Square, VS

3.96ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 30.37

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39.46ct Black Obsidian, Oval, Opaque

39.46ct Black Obsidian, Oval, Opaque

37.4 x 23.7 mm

$ 34.59

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2.11ctw Blue Kyanite, Oval, SI

2.11ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 43.92

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5.89ctw Orange Sunstone, Round, Translucent

5.89ctw Orange Sunstone, Round, Translucent

10 mm (calibrated)

$ 34.32

View Gem
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Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

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So far So good

Posted By VH-1 in July, 2025
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Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
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Overall Rating -> 9 star ratings

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

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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.

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Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

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Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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