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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
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0.87ct Green Sphene, Oval, Transparent

0.87ct Green Sphene, Oval, Transparent

6.2 x 4.8 mm

$ 4.33

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5.79ct Black Tourmaline, Oval, Opaque

5.79ct Black Tourmaline, Oval, Opaque

13.3 x 10.5 mm

$ 28.83

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0.65ct Orange Sphalerite, Round, SI

0.65ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 32.37

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0.45ct Yellow Citrine, Oval, VVS-VS

0.45ct Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 3.14

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0.65ct Violet Amethyst, Marquise, VVS

0.65ct Violet Amethyst, Marquise, VVS

8.2 x 4.2 mm

$ 4.32

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1.08ct Blue Kyanite, Oval, VS

1.08ct Blue Kyanite, Oval, VS

7 x 5 mm (calibrated)

$ 26.89

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1.63ct Yellow Citrine, Round, VVS

1.63ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.99

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5.70ctw Violet Amethyst, Trillion, VS
Amethyst Product Video (674451)

5.70ctw Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 39.74

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51.46ct Multicolor Opal, Oval, Opaque
Opal Product Video (667935)

51.46ct Multicolor Opal, Oval, Opaque

38.3 x 25.5 mm

$ 153.77

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2.42ctw White Rainbow Moonstone, Square, Transparent

2.42ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 38.31

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1.04ctw Red Pyrope Garnet, Square, VVS-VS

1.04ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 7.98

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17.17ct White Rainbow Moonstone, Oval, Translucent

17.17ct White Rainbow Moonstone, Oval, Translucent

24.2 x 12.2 mm

$ 17.10

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0.87ct Orange Hessonite Garnet, Cushion, VS

0.87ct Orange Hessonite Garnet, Cushion, VS

5.3 x 5.2 mm

$ 12.94

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15.17ct Multicolor Labradorite, Oval, Translucent

15.17ct Multicolor Labradorite, Oval, Translucent

22.3 x 16.1 mm

$ 13.60

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1.66ct Yellow Citrine, Flower Cut, Transparent

1.66ct Yellow Citrine, Flower Cut, Transparent

7.7 x 7.1 mm

$ 12.73

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15.42ctw Pink Morganite, Oval, Transparent
Morganite Product Video (595004)

15.42ctw Pink Morganite, Oval, Transparent

14 x 12 mm (calibrated)

$ 168.94

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1.45ct Green Tourmaline, Emerald Cut, VS

1.45ct Green Tourmaline, Emerald Cut, VS

20.8 x 3.2 mm

$ 38.13

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0.89ct Yellow Beryl, Oval, VS

0.89ct Yellow Beryl, Oval, VS

7.9 x 5.7 mm

$ 16.99

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1.05ct Blue Cavansite, Fancy, Opaque

1.05ct Blue Cavansite, Fancy, Opaque

8.1 x 7.6 mm

$ 6.10

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9.97ct Multicolor Pietersite, Pear Shape, Opaque

9.97ct Multicolor Pietersite, Pear Shape, Opaque

21.4 x 18.1 mm

$ 33.10

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3.39ct Yellow Citrine, Square, VS

3.39ct Yellow Citrine, Square, VS

9 x 9 mm (calibrated)

$ 26.00

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11.54ctw White Topaz, Cushion, VVS-VS

11.54ctw White Topaz, Cushion, VVS-VS

12 x 10 mm (calibrated)

$ 76.63

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34.58ct Yellow Rutile Quartz, Emerald Cut, Transparent
Rutile Quartz Product Video (575377)

34.58ct Yellow Rutile Quartz, Emerald Cut, Transparent

25 x 18 mm (calibrated)

$ 101.15

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14.55ct Green Opal, Oval, Opaque

14.55ct Green Opal, Oval, Opaque

20 x 15 mm (calibrated)

$ 33.76

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 -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
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

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

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