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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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Lots
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43.66ct White Dendritic Agate, Pear Shape, Opaque

43.66ct White Dendritic Agate, Pear Shape, Opaque

43.3 x 22.2 mm

$ 21.75

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4.46ctw Orange Hessonite Garnet, Cushion, VS
Hessonite Garnet Product Video (664613)

4.46ctw Orange Hessonite Garnet, Cushion, VS

8 x 6 mm (calibrated)

$ 66.63

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5.55ct Orange Imperial Topaz, Pear Shape, VVS
Imperial Topaz Product Video (346661)

5.55ct Orange Imperial Topaz, Pear Shape, VVS

16.5 x 7.1 mm

$ 3,095.57

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1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.2 x 5.3 mm

$ 55.13

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56.12ctw Gray Hematite, Baguette, Opaque

56.12ctw Gray Hematite, Baguette, Opaque

20 x 15 mm (calibrated)

$ 54.73

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39.74ct Brown Moonstone, Oval, Opaque

39.74ct Brown Moonstone, Oval, Opaque

25 x 18 mm (calibrated)

$ 65.30

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2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

9 x 6 mm (calibrated)

$ 36.62

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0.90ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458684)

0.90ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 162.21

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33.90ct Turquoise Chrysocolla, Oval, Opaque

33.90ct Turquoise Chrysocolla, Oval, Opaque

33.1 x 19.2 mm

$ 57.73

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2.70ct Pink Tourmaline, Emerald Cut, VS-SI

2.70ct Pink Tourmaline, Emerald Cut, VS-SI

9.4 x 6.1 mm

$ 170.09

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24.44ct White Rainbow Moonstone, Marquise, Transparent

24.44ct White Rainbow Moonstone, Marquise, Transparent

29 x 13.7 mm

$ 194.73

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13.71ct Yellow Apatite, Cushion, VS
Apatite Product Video (407302)

13.71ct Yellow Apatite, Cushion, VS

14.9 x 14 mm

$ 566.28

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2.53ct Blue Kyanite, Round, SI

2.53ct Blue Kyanite, Round, SI

8 mm (calibrated)

$ 69.31

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0.84ct Yellow Color-Change Diaspore, Baguette, VVS-VS

0.84ct Yellow Color-Change Diaspore, Baguette, VVS-VS

13.9 x 2.8 mm

$ 44.34

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1.63ct Orange Sphalerite, Oval, SI-I1

1.63ct Orange Sphalerite, Oval, SI-I1

7.3 x 5.3 mm

$ 81.17

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70.42ct Multicolor Jasper, Fancy, Opaque

70.42ct Multicolor Jasper, Fancy, Opaque

46.6 x 31.8 mm

$ 59.40

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56.33ct Multicolor Rhodochrosite, Pear Shape, Translucent
Rhodochrosite Product Video (548707)

56.33ct Multicolor Rhodochrosite, Pear Shape, Translucent

37.5 x 23.3 mm

$ 74.06

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34.92ct Pink Rose Quartz, Cushion, Transparent
Rose Quartz Product Video (355080)

34.92ct Pink Rose Quartz, Cushion, Transparent

23.7 x 17.6 mm

$ 76.51

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46.91ct Multicolor Rhodochrosite, Oval, Opaque

46.91ct Multicolor Rhodochrosite, Oval, Opaque

35.1 x 19.2 mm

$ 112.60

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19.31ct Multicolor Rainbow Pyrite, Fancy, Opaque

19.31ct Multicolor Rainbow Pyrite, Fancy, Opaque

17.9 x 13.7 mm

$ 50.01

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9.50ct Orange Spessartite Garnet, Oval, Transparent
Spessartite Garnet Product Video (386669)

9.50ct Orange Spessartite Garnet, Oval, Transparent

12.5 x 10.1 mm

$ 300.78

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27.15ct Orange Moonstone, Round, Translucent

27.15ct Orange Moonstone, Round, Translucent

19 mm (calibrated)

$ 45.29

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12.71ct Multicolor Fire Agate, Fancy, Opaque
Fire Agate Product Video (584124)

12.71ct Multicolor Fire Agate, Fancy, Opaque

23.3 x 10.6 mm

$ 83.08

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30.50ct Multicolor Boulder Opal, Pear Shape, Translucent
Boulder Opal Product Video (523672)

30.50ct Multicolor Boulder Opal, Pear Shape, Translucent

30 x 22 mm (calibrated)

$ 167.08

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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

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

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

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 -> 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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