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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
Pairs
Lots
Faceted
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34.44ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

34.44ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

36.2 x 25 mm

$ 16.29

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1.17ct Violet Spinel, Cushion, VVS
Spinel Product Video (513401)

1.17ct Violet Spinel, Cushion, VVS

5.6 x 5.6 mm

$ 194.22

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10.67ct Multicolor Ruby In Fuchsite, Marquise, Translucent

10.67ct Multicolor Ruby In Fuchsite, Marquise, Translucent

28.1 x 13.1 mm

$ 79.85

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83.26ct Multicolor Moss Agate, Oval, Opaque
Moss Agate Product Video (695452)

83.26ct Multicolor Moss Agate, Oval, Opaque

60.1 x 30.4 mm

$ 66.34

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69.17ctw White Howlite, Sphere / Ball, Opaque
Howlite Product Video (422984)

69.17ctw White Howlite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 60.62

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24.49ct Blue Chalcedony, Cushion, Opaque

24.49ct Blue Chalcedony, Cushion, Opaque

21 x 20.6 mm

$ 60.99

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54.13ct Pink Rose Quartz, Oval, Transparent/Translucent

54.13ct Pink Rose Quartz, Oval, Transparent/Translucent

25.8 x 22 mm

$ 77.10

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0.88ct Brown Kornerupine, Emerald Cut, VVS-VS

0.88ct Brown Kornerupine, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 74.97

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10.05ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (503395)

10.05ct Blue Aquamarine, Emerald Cut, VVS

17.2 x 9 mm

$ 1,981.94

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23.78ct Green Maw-Sit-Sit, Round, Opaque

23.78ct Green Maw-Sit-Sit, Round, Opaque

16 mm (calibrated)

$ 78.15

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0.31ct Green Kornerupine, Oval, VS-SI

0.31ct Green Kornerupine, Oval, VS-SI

4.7 x 3.7 mm

$ 26.55

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83.49ct Multicolor Agate, Square, Opaque

83.49ct Multicolor Agate, Square, Opaque

27.9 x 27.7 mm

$ 29.10

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143.91ct Multicolor Rhodochrosite, Fancy, Opaque
Rhodochrosite Product Video (471437)

143.91ct Multicolor Rhodochrosite, Fancy, Opaque

43.7 x 25.5 mm

$ 132.70

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0.56ct Yellow Demantoid Garnet, Oval, VVS-VS

0.56ct Yellow Demantoid Garnet, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 153.38

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6.41ct Orange Star Moonstone, Oval, Translucent

6.41ct Orange Star Moonstone, Oval, Translucent

12.3 x 11.5 mm

$ 28.09

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7.33ct Turquoise Grandidierite, Emerald Cut, SI-I1
Grandidierite Product Video (547738)

7.33ct Turquoise Grandidierite, Emerald Cut, SI-I1

16 x 9 mm

$ 240.92

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28.68ct Orange Moonstone, Round, Translucent
Moonstone Product Video (660339)

28.68ct Orange Moonstone, Round, Translucent

19 mm (calibrated)

$ 47.85

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2.38ct Multicolor Spectrolite, Oval, Opaque

2.38ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 23.80

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38.36ct Multicolor Jasper, Marquise, Opaque

38.36ct Multicolor Jasper, Marquise, Opaque

50.6 x 17.5 mm

$ 38.20

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36.66ct Multicolor Jasper, Fancy, Translucent

36.66ct Multicolor Jasper, Fancy, Translucent

45.9 x 26.3 mm

$ 28.93

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109.25ct Multicolor Jasper, Round, Opaque
Jasper Product Video (600282)

109.25ct Multicolor Jasper, Round, Opaque

46.4 mm

$ 68.23

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29.59ct Multicolor Quartz With Marcasite, Baguette, Transparent

29.59ct Multicolor Quartz With Marcasite, Baguette, Transparent

28.1 x 14.9 mm

$ 162.10

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10.80ct Orange Star Moonstone, Oval, Translucent

10.80ct Orange Star Moonstone, Oval, Translucent

13 x 11 mm (calibrated)

$ 43.03

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12.25ct Green Tourmaline, Oval, VVS-VS
Tourmaline Product Video (416463)

12.25ct Green Tourmaline, Oval, VVS-VS

15.7 x 12.8 mm

$ 2,033.50

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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

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar 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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate
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