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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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4.56ctw Multicolor Spectrolite, Oval, Opaque

4.56ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 17.37

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11.21ct White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (669213)

11.21ct White Rainbow Moonstone, Pear Shape, Transparent

19.2 x 11.7 mm

$ 200.98

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56.50ct Violet Charoite, Oval, Opaque
Charoite Product Video (567268)

56.50ct Violet Charoite, Oval, Opaque

45.2 x 27 mm

$ 105.86

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18.78ct Pink Coral, Fancy, Opaque
Coral Product Video (256349)

18.78ct Pink Coral, Fancy, Opaque

18.1 x 16.9 mm

$ 329.21

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11.87ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (407383)

11.87ct Yellow Apatite, Pear Shape, VS

18.8 x 12.8 mm

$ 325.13

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8.58ct Brown Smoky Quartz, Emerald Cut, VVS-VS

8.58ct Brown Smoky Quartz, Emerald Cut, VVS-VS

14 x 14 mm (calibrated)

$ 34.59

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0.55ct Yellow Sphalerite, Fancy, SI

0.55ct Yellow Sphalerite, Fancy, SI

6.1 x 4.2 mm

$ 27.39

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1.42ct White Sillimanite Cat'S Eye, Oval, Transparent

1.42ct White Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 6.4 mm

$ 5.66

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9.76ct Brown Smoky Quartz, Marquise, VS

9.76ct Brown Smoky Quartz, Marquise, VS

18.9 x 13 mm

$ 26.73

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47.89ct Gray Hematite, Oval, Opaque

47.89ct Gray Hematite, Oval, Opaque

23.6 x 18.7 mm

$ 46.70

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1.46ct Purple Spinel, Cushion, VS

1.46ct Purple Spinel, Cushion, VS

6.3 x 6 mm

$ 111.97

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25.47ctw Multicolor Pietersite, Pear Shape, Opaque
Pietersite Product Video (601393)

25.47ctw Multicolor Pietersite, Pear Shape, Opaque

32.9 x 14.6 mm

$ 112.45

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24.94ct Multicolor Rhodochrosite, Pear Shape, Opaque

24.94ct Multicolor Rhodochrosite, Pear Shape, Opaque

34.5 x 13.3 mm

$ 68.32

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5.59ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (407921)

5.59ct Yellow Apatite, Pear Shape, VS

14 x 10 mm (calibrated)

$ 254.47

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26.17ct Pink Smithsonite, Cushion, Transparent
Smithsonite Product Video (380713)

26.17ct Pink Smithsonite, Cushion, Transparent

15 x 15 mm (calibrated)

$ 772.41

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0.99ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.99ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 4.9 mm

$ 3.25

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63.42ct Multicolor Rhodonite, Fancy, Opaque
Rhodonite Product Video (690743)

63.42ct Multicolor Rhodonite, Fancy, Opaque

25.7 x 22.9 mm

$ 58.12

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31.32ct Black Tourmaline, Emerald Cut, Opaque

31.32ct Black Tourmaline, Emerald Cut, Opaque

25 x 15 mm

$ 129.98

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6.01ct Blue Aquamarine, Emerald Cut, VS
Aquamarine Product Video (412445)

6.01ct Blue Aquamarine, Emerald Cut, VS

12.6 x 8.2 mm

$ 954.76

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2.03ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (461509)

2.03ctw Green Demantoid Garnet, Oval, VS

4.8 x 4.1 mm

$ 185.34

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6.16ct Green Apatite, Emerald Cut, VS-SI
Apatite Product Video (396131)

6.16ct Green Apatite, Emerald Cut, VS-SI

10 x 10 mm (calibrated)

$ 250.71

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0.90ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.90ct Yellow Color-Change Diaspore, Emerald Cut, VS

8.7 x 4.1 mm

$ 39.59

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2.55ct Orange Hessonite Garnet, Emerald Cut, SI

2.55ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 35.06

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0.65ct Yellow Citrine, Pear Shape, VS
Citrine Product Video (546443)

0.65ct Yellow Citrine, Pear Shape, VS

7 x 5 mm (calibrated)

$ 2.97

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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

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.

Posted By Ktreva52 in June, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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