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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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1.27ct Yellow Color-Change Diaspore, Emerald Cut, SI

1.27ct Yellow Color-Change Diaspore, Emerald Cut, SI

12.1 x 3.9 mm

$ 68.28

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6.99ct Brown Rutile Quartz, Round, Translucent

6.99ct Brown Rutile Quartz, Round, Translucent

12 mm (calibrated)

$ 14.62

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2.36ctw Pink Morganite, Oval, VS

2.36ctw Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 129.28

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2.02ctw Blue Kyanite, Oval, SI

2.02ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 35.04

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24.46ct Black Obsidian, Fancy, Opaque

24.46ct Black Obsidian, Fancy, Opaque

30 x 22 mm (calibrated)

$ 12.18

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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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16.97ct Turquoise Amazonite, Pear Shape, Opaque

16.97ct Turquoise Amazonite, Pear Shape, Opaque

18.6 x 17.6 mm

$ 18.59

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1.50ct Purple Spinel, Cushion, VS

1.50ct Purple Spinel, Cushion, VS

7.1 x 6 mm

$ 138.88

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382.95ct Pink Star Rose Quartz, Oval, Transparent/Translucent
Star Rose Quartz Product Video (354763)

382.95ct Pink Star Rose Quartz, Oval, Transparent/Translucent

44.4 x 42.5 mm

$ 635.70

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9.38ct Turquoise Larimar, Pear Shape, Opaque

9.38ct Turquoise Larimar, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 93.34

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83.94ctw Gray Hematite, Round, Opaque

83.94ctw Gray Hematite, Round, Opaque

23 mm

$ 81.85

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5.60ct Green Amazonite, Marquise, Opaque

5.60ct Green Amazonite, Marquise, Opaque

20 x 10 mm (calibrated)

$ 11.20

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15.94ct Brown Smoky Quartz, Round, VVS
Smoky Quartz Product Video (602194)

15.94ct Brown Smoky Quartz, Round, VVS

18 mm (calibrated)

$ 64.28

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35.81ct Pink Rose Quartz, Pear Shape, Transparent
Rose Quartz Product Video (528670)

35.81ct Pink Rose Quartz, Pear Shape, Transparent

27 x 20 mm (calibrated)

$ 78.47

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41.62ct Multicolor Jasper, Pear Shape, Opaque

41.62ct Multicolor Jasper, Pear Shape, Opaque

38.2 x 33.5 mm

$ 45.60

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1.11ct Orange Hessonite Garnet, Round, SI-I1
Hessonite Garnet Product Video (546440)

1.11ct Orange Hessonite Garnet, Round, SI-I1

6 mm (calibrated)

$ 15.58

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1.10ct Green Tsavorite Garnet, Oval, VS-SI
Tsavorite Garnet Product Video (715317)

1.10ct Green Tsavorite Garnet, Oval, VS-SI

7.4 x 5.5 mm

$ 438.24

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13.25ct Brown Smoky Quartz, Emerald Cut, VVS

13.25ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 36.30

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34.16ct Multicolor Boulder Opal, Oval, Opaque
Boulder Opal Product Video (410119)

34.16ct Multicolor Boulder Opal, Oval, Opaque

23.4 x 19.6 mm

$ 262.36

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5.89ct Brown Cat'S Eye Opal, Oval, Translucent

5.89ct Brown Cat'S Eye Opal, Oval, Translucent

13.7 x 10.5 mm

$ 32.27

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27.43ctw Purple Rubellite Tourmaline, Pear Shape, Translucent
Rubellite Tourmaline Product Video (562192)

27.43ctw Purple Rubellite Tourmaline, Pear Shape, Translucent

18 x 14.1 mm

$ 760.65

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7.96ct Orange Star Moonstone, Oval, Translucent

7.96ct Orange Star Moonstone, Oval, Translucent

16.6 x 8.4 mm

$ 29.07

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18.42ct Brown Moonstone, Fancy, Translucent
Moonstone Product Video (582246)

18.42ct Brown Moonstone, Fancy, Translucent

24.7 x 16.5 mm

$ 110.19

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2.78ct Orange Coral, Oval, Opaque
Coral Product Video (499196)

2.78ct Orange Coral, Oval, Opaque

12 x 5.6 mm

$ 456.87

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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

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

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 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 -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
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

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
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