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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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7.70ctw Violet Amethyst, Oval, Transparent

7.70ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 42.18

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9.84ct Multicolor Labradorite, Marquise, Translucent

9.84ct Multicolor Labradorite, Marquise, Translucent

22.2 x 10.7 mm

$ 11.96

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4.80ct Pink Morganite, Oval, Transparent

4.80ct Pink Morganite, Oval, Transparent

17.4 x 8.7 mm

$ 55.17

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2.74ct Multicolor Opal, Pear Shape, Translucent

2.74ct Multicolor Opal, Pear Shape, Translucent

12 x 9.1 mm

$ 57.31

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2.03ct Green Tourmaline, Fancy, VVS
Tourmaline Product Video (715335)

2.03ct Green Tourmaline, Fancy, VVS

9 x 5.1 mm

$ 202.19

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4.10ctw Red Almandine Garnet, Round, Transparent

4.10ctw Red Almandine Garnet, Round, Transparent

3 mm (calibrated)

$ 23.61

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0.58ct White Topaz, Square, VVS-VS
Topaz Product Video (636248)

0.58ct White Topaz, Square, VVS-VS

4.6 x 4.6 mm

$ 3.36

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5.36ct Brown Rutile Quartz, Round, Transparent

5.36ct Brown Rutile Quartz, Round, Transparent

12 mm (calibrated)

$ 13.45

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1.29ct Orange Hessonite Garnet, Baguette, VS

1.29ct Orange Hessonite Garnet, Baguette, VS

6.3 x 4.9 mm

$ 24.36

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5.67ct Violet Amethyst, Round, Transparent

5.67ct Violet Amethyst, Round, Transparent

11 mm (calibrated)

$ 39.53

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7.90ct Green Prehnite, Fancy, Transparent

7.90ct Green Prehnite, Fancy, Transparent

17.7 x 11.9 mm

$ 12.81

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10.47ct Multicolor Agate, Sphere / Ball, Opaque
Agate Product Video (700587)

10.47ct Multicolor Agate, Sphere / Ball, Opaque

11 mm (calibrated)

$ 6.96

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3.36ct Violet Amethyst, Oval, Transparent

3.36ct Violet Amethyst, Oval, Transparent

10.6 x 8.7 mm

$ 20.08

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2.97ct Pink Strawberry Quartz, Round, Translucent

2.97ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 18.16

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254.67ct Pink Star Rose Quartz, Oval, Transparent
Star Rose Quartz Product Video (505885)

254.67ct Pink Star Rose Quartz, Oval, Transparent

38.4 x 32.2 mm

$ 317.06

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1.26ct Multicolor Opal, Oval, Translucent
Opal Product Video (503728)

1.26ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 30.37

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21.61ct Violet Amethyst, Emerald Cut, VVS

21.61ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 150.66

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0.55ctw Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

0.55ctw Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

4.6 x 2.9 mm

$ 16.43

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13.37ct Turquoise Hiddenite, Emerald Cut, VVS-VS
Hiddenite Product Video (706355)

13.37ct Turquoise Hiddenite, Emerald Cut, VVS-VS

20.2 x 10.8 mm

$ 276.54

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7.53ctw Green Prehnite, Oval, Transparent
Prehnite Product Video (376785)

7.53ctw Green Prehnite, Oval, Transparent

7.8 x 7.1 mm

$ 57.75

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1.84ct Pink Morganite, Round, VS

1.84ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 141.12

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20.45ctw Multicolor Fossil Coral, Fancy, Opaque

20.45ctw Multicolor Fossil Coral, Fancy, Opaque

23.6 x 11 mm

$ 36.51

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1.06ct Orange Hessonite Garnet, Pear Shape, VS-SI

1.06ct Orange Hessonite Garnet, Pear Shape, VS-SI

8.1 x 5.7 mm

$ 23.22

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1.27ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.27ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8 x 5 mm (calibrated)

$ 65.40

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!

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 -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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