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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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26.04ct Green Amazonite, Oval, Opaque
Amazonite Product Video (484654)

26.04ct Green Amazonite, Oval, Opaque

26.4 x 13.6 mm

$ 17.29

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68.84ct Green Malachite, Square, Opaque
Malachite Product Video (669074)

68.84ct Green Malachite, Square, Opaque

25 x 24.3 mm

$ 68.57

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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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48.61ct White Scolecite, Oval, Opaque
Scolecite Product Video (481303)

48.61ct White Scolecite, Oval, Opaque

40 x 22.9 mm

$ 57.52

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1.31ct Yellow Chrysoberyl, Pear Shape, VVS-VS
Chrysoberyl Product Video (366492)

1.31ct Yellow Chrysoberyl, Pear Shape, VVS-VS

9 x 6 mm (calibrated)

$ 152.65

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11.64ct Pink Kunzite, Oval, VS
Kunzite Product Video (441221)

11.64ct Pink Kunzite, Oval, VS

14.1 x 10.8 mm

$ 255.06

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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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4.31ctw Orange Hessonite Garnet, Square, VS
Hessonite Garnet Product Video (392993)

4.31ctw Orange Hessonite Garnet, Square, VS

6.9 x 6.7 mm

$ 94.44

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1.37ct Orange Sphalerite, Round, SI

1.37ct Orange Sphalerite, Round, SI

6.5 mm (calibrated)

$ 68.23

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15.27ct Green Prehnite, Oval, Translucent

15.27ct Green Prehnite, Oval, Translucent

18 x 13 mm (calibrated)

$ 35.14

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29.21ct Blue Chalcedony, Cushion, Opaque

29.21ct Blue Chalcedony, Cushion, Opaque

33.6 x 18.4 mm

$ 60.61

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6.64ct Green Tsavorite Garnet, Pear Shape, Translucent

6.64ct Green Tsavorite Garnet, Pear Shape, Translucent

18.3 x 8.8 mm

$ 145.50

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9.91ctw White Quartz Cat'S Eye, Round, Transparent

9.91ctw White Quartz Cat'S Eye, Round, Transparent

10 mm (calibrated)

$ 35.29

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71.86ct Yellow Obsidian, Oval, Opaque
Obsidian Product Video (447906)

71.86ct Yellow Obsidian, Oval, Opaque

43.1 x 31 mm

$ 71.57

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5.84ct Bi-Color Tourmaline, Emerald Cut, SI
Tourmaline Product Video (696780)

5.84ct Bi-Color Tourmaline, Emerald Cut, SI

17 x 17 mm (calibrated)

$ 467.20

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26.39ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (350679)

26.39ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 115.65

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35.68ct Black Snowflake Obsidian, Fancy, Opaque

35.68ct Black Snowflake Obsidian, Fancy, Opaque

26.4 x 24.5 mm

$ 20.97

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2.19ct Orange Hessonite Garnet, Oval, VS-SI

2.19ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 65.00

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1.21ct Purple Sapphire, Pear Shape, VS
Sapphire Product Video (448580)

1.21ct Purple Sapphire, Pear Shape, VS

7.4 x 5.4 mm

$ 532.48

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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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19.99ct Multicolor Rainbow Pyrite, Baguette, Opaque

19.99ct Multicolor Rainbow Pyrite, Baguette, Opaque

20 x 15 mm (calibrated)

$ 43.14

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114.72ct Multicolor Psilomelane Dendrite, Oval, Opaque
Psilomelane Dendrite Product Video (691589)

114.72ct Multicolor Psilomelane Dendrite, Oval, Opaque

57.9 x 34.5 mm

$ 92.55

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8.98ct Yellow Star Moonstone, Oval, Opaque

8.98ct Yellow Star Moonstone, Oval, Opaque

13 x 11 mm (calibrated)

$ 39.35

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21.58ct Violet Amethyst, Cushion, VVS-VS
Amethyst Product Video (680004)

21.58ct Violet Amethyst, Cushion, VVS-VS

16 x 16 mm (calibrated)

$ 171.95

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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 loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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