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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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0.60ct Yellow Color-Change Diaspore, Cushion, VS

0.60ct Yellow Color-Change Diaspore, Cushion, VS

5.2 x 4.8 mm

$ 31.67

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1.00ct Purple Spinel, Cushion, VS

1.00ct Purple Spinel, Cushion, VS

6.6 x 5.5 mm

$ 119.52

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1.04ctw Red Pyrope Garnet, Square, VVS-VS

1.04ctw Red Pyrope Garnet, Square, VVS-VS

4.2 x 4.1 mm

$ 7.98

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4.99ctw Orange Sunstone, Oval, Translucent

4.99ctw Orange Sunstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 38.26

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0.72ct Multicolor Opal, Oval, Transparent

0.72ct Multicolor Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 33.92

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14.47ctw Black Spinel, Round, Opaque

14.47ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 47.56

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0.87ctw Red Pyrope Garnet, Square, VS

0.87ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 6.67

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0.35ct Blue Kyanite, Round, VS

0.35ct Blue Kyanite, Round, VS

3.8 mm

$ 6.27

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2.06ct Red Almandine Garnet, Oval, VVS-VS

2.06ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 59.84

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18.63ct Black Tourmaline, Oval, Opaque

18.63ct Black Tourmaline, Oval, Opaque

15 x 15 mm (calibrated)

$ 66.24

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1.71ctw Red Pyrope Garnet, Marquise, VVS-VS

1.71ctw Red Pyrope Garnet, Marquise, VVS-VS

9.8 x 4.9 mm

$ 14.99

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1.38ct Blue Kyanite, Oval, SI

1.38ct Blue Kyanite, Oval, SI

7.1 x 5.2 mm

$ 34.36

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2.05ct Red Almandine Garnet, Baguette, VVS-VS

2.05ct Red Almandine Garnet, Baguette, VVS-VS

10.1 x 5 mm

$ 76.57

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1.06ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.06ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8.6 x 5.1 mm

$ 43.24

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5.82ct Multicolor Fire Agate, Fancy, Translucent

5.82ct Multicolor Fire Agate, Fancy, Translucent

15.5 x 10.4 mm

$ 41.72

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0.14ct Yellow Diamond, Round, VVS-VS
Diamond Product Video (564574)

0.14ct Yellow Diamond, Round, VVS-VS

3.2 mm

$ 232.35

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0.78ct Pink Malaya Garnet, Round, VS

0.78ct Pink Malaya Garnet, Round, VS

5.3 mm

$ 34.18

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23.68ct Violet Amethyst, Emerald Cut, VVS

23.68ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 165.10

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0.48ct Pink Morganite, Pear Shape, VVS

0.48ct Pink Morganite, Pear Shape, VVS

7.4 x 4.4 mm

$ 28.93

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7.73ctw White Topaz, Square, VVS

7.73ctw White Topaz, Square, VVS

5 x 5 mm (calibrated)

$ 64.53

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1.38ct White Cat'S Eye Moonstone, Oval, Transparent

1.38ct White Cat'S Eye Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 7.56

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6.02ct Green Prehnite, Fancy, Translucent

6.02ct Green Prehnite, Fancy, Translucent

13.4 x 9.6 mm

$ 9.89

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1.05ctw Orange Citrine, Marquise, VS

1.05ctw Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 6.27

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1.70ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

1.70ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

12.3 x 5.8 mm

$ 74.78

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 -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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