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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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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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6.45ct Brown Smoky Quartz, Flower Cut, Transparent

6.45ct Brown Smoky Quartz, Flower Cut, Transparent

14.2 x 10.2 mm

$ 23.96

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8.60ct Green Actinolite Cat'S Eye, Oval, Translucent

8.60ct Green Actinolite Cat'S Eye, Oval, Translucent

16.2 x 13.4 mm

$ 59.96

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8.46ct Yellow Rutile Quartz, Round, Transparent/Translucent
Rutile Quartz Product Video (346764)

8.46ct Yellow Rutile Quartz, Round, Transparent/Translucent

13 mm (calibrated)

$ 38.62

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0.87ct Green Sphene, Emerald Cut, VS

0.87ct Green Sphene, Emerald Cut, VS

8 x 4.2 mm

$ 37.26

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1.19ct Purple Sapphire, Pear Shape, VS-SI
Sapphire Product Video (447865)

1.19ct Purple Sapphire, Pear Shape, VS-SI

7.8 x 5.8 mm

$ 475.42

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9.99ct Yellow Apatite, Cushion, VVS-VS
Apatite Product Video (398362)

9.99ct Yellow Apatite, Cushion, VVS-VS

17.1 x 10.5 mm

$ 473.71

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7.56ct White Quartz Cat'S Eye, Round, Transparent

7.56ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 33.13

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5.96ct Green Prehnite, Fancy, Transparent

5.96ct Green Prehnite, Fancy, Transparent

14.9 x 11.2 mm

$ 25.88

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23.73ct Black Nuummite, Oval, Opaque

23.73ct Black Nuummite, Oval, Opaque

23.8 x 15.8 mm

$ 81.15

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1.67ct Brown Diamond, Round, SI
Diamond Product Video (378646)

1.67ct Brown Diamond, Round, SI

7.5 mm (calibrated)

$ 3,603.86

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2.94ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.94ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.7 x 5 mm

$ 11.65

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43.39ct Pink Rose Quartz, Pear Shape, Transparent
Rose Quartz Product Video (528821)

43.39ct Pink Rose Quartz, Pear Shape, Transparent

30 x 20.2 mm

$ 79.23

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1.50ct Orange Sphalerite, Round, SI-I1
Sphalerite Product Video (691695)

1.50ct Orange Sphalerite, Round, SI-I1

6.5 mm (calibrated)

$ 62.25

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39.86ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

39.86ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

21 x 19.4 mm

$ 23.02

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12.65ct Brown Smoky Quartz, Round, VS

12.65ct Brown Smoky Quartz, Round, VS

16 mm (calibrated)

$ 20.80

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44.60ct Violet Amethyst, Oval, VVS
Amethyst Product Video (679797)

44.60ct Violet Amethyst, Oval, VVS

24.8 x 19.7 mm

$ 296.14

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37.39ct Multicolor Rainbow Pyrite, Heart, Opaque

37.39ct Multicolor Rainbow Pyrite, Heart, Opaque

32.2 x 24.9 mm

$ 96.82

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11.45ctw Green Amazonite, Cushion, Opaque

11.45ctw Green Amazonite, Cushion, Opaque

10 x 10 mm (calibrated)

$ 23.21

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28.16ct Multicolor Pietersite, Pear Shape, Opaque
Pietersite Product Video (351543)

28.16ct Multicolor Pietersite, Pear Shape, Opaque

29 x 19.5 mm

$ 102.84

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0.56ctw White Diamond, Heart, VVS
Diamond Product Video (685657)

0.56ctw White Diamond, Heart, VVS

3 x 2.6 mm

$ 1,901.30

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29.76ct Multicolor Obsidian, Oval, Opaque

29.76ct Multicolor Obsidian, Oval, Opaque

30 x 22 mm (calibrated)

$ 25.11

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5.59ct Brown Rutile Quartz, Round, Transparent

5.59ct Brown Rutile Quartz, Round, Transparent

12 mm (calibrated)

$ 14.03

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37.40ct White Dendritic Agate, Fancy, Opaque

37.40ct White Dendritic Agate, Fancy, Opaque

31.7 x 22.1 mm

$ 26.08

View Gem
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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

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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
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