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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
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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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1.19ctw Red Pyrope Garnet, Heart, VS

1.19ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 29.63

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4.23ctw Multicolor Andalusite, Round, VS-SI
Andalusite Product Video (310832)

4.23ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 208.55

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0.57ct Orange Spessartite Garnet, Oval, VS

0.57ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 17.03

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12.54ct Violet Amethyst, Cushion, VVS

12.54ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 99.92

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24.45ct Gray Hematite, Marquise, Opaque

24.45ct Gray Hematite, Marquise, Opaque

27.3 x 13 mm

$ 24.64

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0.44ct Yellow Citrine, Heart, VVS-VS

0.44ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.50

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1.45ct Yellow Citrine, Flower Cut, Transparent

1.45ct Yellow Citrine, Flower Cut, Transparent

8 x 8 mm (calibrated)

$ 11.12

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0.23ct Pink Morganite, Round, VVS-VS

0.23ct Pink Morganite, Round, VVS-VS

4.5 mm (calibrated)

$ 8.59

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2.20ctw Multicolor Andalusite, Round, VS

2.20ctw Multicolor Andalusite, Round, VS

4 mm (calibrated)

$ 108.46

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5.97ctw Brown Tiger'S Eye, Oval, Opaque

5.97ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.92

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3.80ctw Red Pyrope Garnet, Square, VS

3.80ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 29.14

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19.56ctw Multicolor Labradorite, Pear Shape, Translucent

19.56ctw Multicolor Labradorite, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 42.86

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15.04ct Multicolor Agate, Sphere / Ball, Opaque
Agate Product Video (701056)

15.04ct Multicolor Agate, Sphere / Ball, Opaque

12 mm (calibrated)

$ 11.99

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3.23ct Violet Amethyst, Trillion, VVS-VS

3.23ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 22.52

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2.71ct Red Almandine Garnet, Pear Shape, VS

2.71ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 22.49

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18.60ct Green Uvarovite Garnet Drusy, Fancy, Opaque

18.60ct Green Uvarovite Garnet Drusy, Fancy, Opaque

27.7 x 14.2 mm

$ 27.79

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1.08ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.08ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

6.9 x 5.3 mm

$ 16.05

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10.44ct Green Prehnite, Fancy, Translucent

10.44ct Green Prehnite, Fancy, Translucent

16 x 12 mm (calibrated)

$ 17.16

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2.54ct Orange Moonstone, Cushion, Translucent

2.54ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 5.06

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14.29ct Multicolor Jasper, Oval, Opaque

14.29ct Multicolor Jasper, Oval, Opaque

24.3 x 14.5 mm

$ 18.79

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1.15ct Brown Color-Change Garnet, Oval, VS

1.15ct Brown Color-Change Garnet, Oval, VS

6.8 x 5.6 mm

$ 91.87

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2.35ctw Red Pyrope Garnet, Marquise, VVS-VS

2.35ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 20.60

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19.65ct Green Amazonite, Cushion, Opaque

19.65ct Green Amazonite, Cushion, Opaque

6 mm (calibrated)

$ 19.96

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4.89ct Brown Mother Of Pearl, Fancy, Opaque

4.89ct Brown Mother Of Pearl, Fancy, Opaque

20.5 x 13 mm

$ 8.88

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

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was great

Posted By Nik in June, 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 -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie 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
→ View All GemSelect Reviews on Bizrate
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