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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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0.07ct Black Diamond, Round, Opaque

0.07ct Black Diamond, Round, Opaque

2.5 mm (calibrated)

$ 33.87

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12.21ct Black Tourmaline, Heart, Opaque

12.21ct Black Tourmaline, Heart, Opaque

15.7 x 14.6 mm

$ 50.67

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0.23ctw White Diamond, Round, VVS-VS
Diamond Product Video (567452)

0.23ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 373.80

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1.51ct Yellow Citrine, Oval, VVS

1.51ct Yellow Citrine, Oval, VVS

9 x 7 mm (calibrated)

$ 10.52

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10.81ctw Multicolor Labradorite, Pear Shape, Translucent

10.81ctw Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 23.69

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2.19ct Orange Moonstone, Trillion, Translucent

2.19ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 4.37

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14.17ct Multicolor Jasper, Fancy, Opaque

14.17ct Multicolor Jasper, Fancy, Opaque

17.6 x 14.4 mm

$ 15.53

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6.20ct Green Opal, Oval, Opaque

6.20ct Green Opal, Oval, Opaque

14.7 x 11.6 mm

$ 13.28

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7.63ct Orange Zircon, Emerald Cut, VVS-VS
Zircon Product Video (757562)

7.63ct Orange Zircon, Emerald Cut, VVS-VS

12 x 7.4 mm

$ 763.00

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2.51ct Multicolor Labradorite, Marquise, Translucent

2.51ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.54

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6.28ct Brown Tiger'S Eye, Cushion, Opaque

6.28ct Brown Tiger'S Eye, Cushion, Opaque

10 x 10 mm (calibrated)

$ 6.26

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2.23ct Green Sphene, Oval, Transparent

2.23ct Green Sphene, Oval, Transparent

8.1 x 7 mm

$ 12.22

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1.75ct Pink Morganite, Pear Shape, VS

1.75ct Pink Morganite, Pear Shape, VS

11.6 x 6.8 mm

$ 134.21

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8.34ct Pink Strawberry Quartz, Oval, Translucent
Strawberry Quartz Product Video (527539)

8.34ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 50.07

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2.25ct Violet Amethyst, Trillion, VS

2.25ct Violet Amethyst, Trillion, VS

9 x 9 mm (calibrated)

$ 17.26

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5.07ct Yellow Citrine, Briolette, VVS-VS

5.07ct Yellow Citrine, Briolette, VVS-VS

13.3 x 8.2 mm

$ 29.17

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10.21ct Violet Amethyst, Oval, Transparent

10.21ct Violet Amethyst, Oval, Transparent

15 x 15 mm (calibrated)

$ 50.85

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3.58ct Green Chrysoprase, Oval, Opaque

3.58ct Green Chrysoprase, Oval, Opaque

10.4 x 8.9 mm

$ 29.71

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1.52ct Purple Spinel, Cushion, VVS-VS

1.52ct Purple Spinel, Cushion, VVS-VS

6.9 x 5.8 mm

$ 108.25

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1.51ctw Green Demantoid Garnet, Oval, VS

1.51ctw Green Demantoid Garnet, Oval, VS

4.8 x 4 mm

$ 165.44

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1.40ctw Red Rhodolite Garnet, Square, VS

1.40ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.26

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1.23ct Green Tourmaline, Emerald Cut, VVS-VS

1.23ct Green Tourmaline, Emerald Cut, VVS-VS

15.4 x 3.2 mm

$ 25.74

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6.08ct Violet Amethyst, Pear Shape, Transparent

6.08ct Violet Amethyst, Pear Shape, Transparent

13 x 11 mm (calibrated)

$ 36.34

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10.40ct Yellow Citrine, Cushion, VS

10.40ct Yellow Citrine, Cushion, VS

15.4 x 11.8 mm

$ 69.06

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

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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