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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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20.55ct Multicolor Boulder Opal, Pear Shape, Opaque

20.55ct Multicolor Boulder Opal, Pear Shape, Opaque

31.9 x 16.1 mm

$ 112.58

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27.61ct Brown Moonstone, Oval, Opaque

27.61ct Brown Moonstone, Oval, Opaque

22.3 x 16.1 mm

$ 60.50

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35.99ct Multicolor Boulder Opal, Fancy, Opaque
Boulder Opal Product Video (575226)

35.99ct Multicolor Boulder Opal, Fancy, Opaque

45 x 23.8 mm

$ 107.53

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13.83ct Pink Kunzite, Oval, VS
Kunzite Product Video (438043)

13.83ct Pink Kunzite, Oval, VS

14.7 x 11.5 mm

$ 303.04

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41.49ct Brown Tiger'S Eye, Cushion, Opaque

41.49ct Brown Tiger'S Eye, Cushion, Opaque

27.3 x 23.9 mm

$ 41.33

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7.85ct Yellow Rutile Quartz, Oval, Transparent

7.85ct Yellow Rutile Quartz, Oval, Transparent

15 x 10.8 mm

$ 21.50

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12.84ct Green Tsavorite Garnet, Pear Shape, Translucent
Tsavorite Garnet Product Video (521325)

12.84ct Green Tsavorite Garnet, Pear Shape, Translucent

22.1 x 11.3 mm

$ 281.35

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1.67ct Green Tourmaline, Fancy, VVS
Tourmaline Product Video (715332)

1.67ct Green Tourmaline, Fancy, VVS

7.8 x 5.7 mm

$ 199.60

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1.37ct Yellow Sillimanite, Oval, VS

1.37ct Yellow Sillimanite, Oval, VS

8 x 6 mm (calibrated)

$ 52.54

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4.14ct Pink Strawberry Quartz, Round, Translucent

4.14ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 24.86

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15.07ct Brown Moonstone, Fancy, Translucent

15.07ct Brown Moonstone, Fancy, Translucent

16 x 12.8 mm

$ 17.33

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12.63ct Green Druzy Variscite, Fancy, Opaque

12.63ct Green Druzy Variscite, Fancy, Opaque

25.5 x 14.5 mm

$ 19.24

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7.13ct Pink Strawberry Quartz, Round, Translucent

7.13ct Pink Strawberry Quartz, Round, Translucent

12 mm (calibrated)

$ 49.71

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19.53ct Multicolor Rainbow Pyrite, Oval, Opaque

19.53ct Multicolor Rainbow Pyrite, Oval, Opaque

23.8 x 17.9 mm

$ 50.58

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7.50ct Multicolor Fire Agate, Fancy, Translucent
Fire Agate Product Video (623668)

7.50ct Multicolor Fire Agate, Fancy, Translucent

13.8 x 11.1 mm

$ 105.68

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45.87ct Green Serpentine, Oval, Translucent

45.87ct Green Serpentine, Oval, Translucent

31.9 x 22 mm

$ 98.22

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29.82ctw Multicolor Fossil Coral, Oval, Opaque

29.82ctw Multicolor Fossil Coral, Oval, Opaque

20.3 x 13 mm

$ 38.55

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19.00ct Green Maw-Sit-Sit, Round, Opaque

19.00ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 44.34

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20.59ct Violet Amethyst, Cushion, VVS
Amethyst Product Video (694477)

20.59ct Violet Amethyst, Cushion, VVS

18 x 18 mm (calibrated)

$ 119.63

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87.88ctw Gray Hematite, Cushion, Opaque

87.88ctw Gray Hematite, Cushion, Opaque

23.4 x 19.5 mm

$ 85.69

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9.78ct Brown Smoky Quartz, Round, VVS-VS

9.78ct Brown Smoky Quartz, Round, VVS-VS

14 mm (calibrated)

$ 32.14

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2.50ct Green Peridot, Cushion, VS
Peridot Product Video (332275)

2.50ct Green Peridot, Cushion, VS

9.7 x 7.5 mm

$ 82.17

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42.59ct Multicolor Jasper, Fancy, Opaque

42.59ct Multicolor Jasper, Fancy, Opaque

39.2 x 19.9 mm

$ 46.66

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11.84ctw Brown Moonstone, Flower Cut, Translucent

11.84ctw Brown Moonstone, Flower Cut, Translucent

13 x 13 mm (calibrated)

$ 51.89

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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

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
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Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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Overall Rating -> 10 star ratings

I was able to find what i needed once I worked out what I was looking for.

Posted By Dr Kenneth in August, 2026
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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
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