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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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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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21.74ct Pink Kunzite, Pear Shape, VS
Kunzite Product Video (437944)

21.74ct Pink Kunzite, Pear Shape, VS

23.6 x 11.7 mm

$ 476.37

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9.33ct Brown Moonstone, Flower Cut, Translucent

9.33ct Brown Moonstone, Flower Cut, Translucent

15.7 x 15.3 mm

$ 40.89

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108.15ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (522443)

108.15ct Pink Rose Quartz, Oval, Transparent

37.9 x 26.2 mm

$ 236.98

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44.10ct Multicolor Quartz With Marcasite, Fancy, Transparent
Quartz With Marcasite Product Video (586699)

44.10ct Multicolor Quartz With Marcasite, Fancy, Transparent

35.1 x 23.7 mm

$ 241.58

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14.53ct Pink Rose Quartz, Emerald Cut, Transparent

14.53ct Pink Rose Quartz, Emerald Cut, Transparent

15 x 15 mm (calibrated)

$ 79.60

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45.06ct Black Nuummite, Oval, Opaque

45.06ct Black Nuummite, Oval, Opaque

30 x 19.4 mm

$ 188.58

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17.12ct Red Strawberry Quartz, Oval, Translucent

17.12ct Red Strawberry Quartz, Oval, Translucent

18.2 x 14.2 mm

$ 131.29

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9.38ct Turquoise Larimar, Pear Shape, Opaque

9.38ct Turquoise Larimar, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 93.34

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5.13ct Brown Smoky Quartz, Round, VS

5.13ct Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 20.68

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3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque
Lapis Lazuli Product Video (337538)

3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque

72.4 mm

$ 1,774.87

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15.01ct Black Nuummite, Oval, Opaque

15.01ct Black Nuummite, Oval, Opaque

19.7 x 11.5 mm

$ 65.93

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8.20ct Pink Rose Quartz, Emerald Cut, Transparent

8.20ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 44.92

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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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22.83ct Gray Hematite, Heart, Opaque

22.83ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 50.03

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3.38ct Turquoise Fluorite, Pear Shape, Transparent

3.38ct Turquoise Fluorite, Pear Shape, Transparent

10 x 8.9 mm

$ 13.46

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65.85ct Multicolor Ruby-Zoisite, Baguette, Opaque
Ruby-Zoisite Product Video (484041)

65.85ct Multicolor Ruby-Zoisite, Baguette, Opaque

25.7 x 22.3 mm

$ 108.22

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11.78ctw Multicolor Tourmaline, Fancy, Transparent
Tourmaline Product Video (690541)

11.78ctw Multicolor Tourmaline, Fancy, Transparent

20.1 x 9.5 mm

$ 229.61

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17.32ct Brown Smoky Quartz, Fancy, Transparent
Smoky Quartz Product Video (501492)

17.32ct Brown Smoky Quartz, Fancy, Transparent

33.2 x 18.6 mm

$ 28.47

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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

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80.06ct Multicolor Jasper, Pear Shape, Opaque

80.06ct Multicolor Jasper, Pear Shape, Opaque

43.8 x 20.3 mm

$ 49.11

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23.51ct Green Prehnite, Fancy, Translucent

23.51ct Green Prehnite, Fancy, Translucent

22.4 x 14.1 mm

$ 40.70

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4.61ctw Multicolor Spectrolite, Oval, Opaque

4.61ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 21.07

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13.03ct Blue Chalcedony, Pear Shape, Opaque

13.03ct Blue Chalcedony, Pear Shape, Opaque

26 x 13.7 mm

$ 27.04

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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 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 -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
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 -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate
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