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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

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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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8.03ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (385931)

8.03ct Yellow Apatite, Pear Shape, VS

17 x 11 mm

$ 424.06

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1.53ct Purple Spinel, Cushion, VS

1.53ct Purple Spinel, Cushion, VS

6.7 x 5.3 mm

$ 117.34

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33.92ct Green Maw-Sit-Sit, Oval, Opaque

33.92ct Green Maw-Sit-Sit, Oval, Opaque

23 x 15.9 mm

$ 101.35

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0.49ct Orange Sphalerite, Round, SI-I1

0.49ct Orange Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 24.40

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7.78ct Turquoise Grandidierite, Cushion, VS-SI
Grandidierite Product Video (472024)

7.78ct Turquoise Grandidierite, Cushion, VS-SI

15.2 x 10.7 mm

$ 1,704.75

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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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4.14ct Pink Strawberry Quartz, Round, Translucent

4.14ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 24.86

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4.97ct Green Sphene, Pear Shape, VS-SI
Sphene Product Video (380599)

4.97ct Green Sphene, Pear Shape, VS-SI

11.3 x 9.7 mm

$ 534.76

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83.34ct Multicolor Psilomelane Dendrite, Pear Shape, Opaque
Psilomelane Dendrite Product Video (691651)

83.34ct Multicolor Psilomelane Dendrite, Pear Shape, Opaque

54.9 x 31 mm

$ 49.80

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10.12ct Blue Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (690462)

10.12ct Blue Tourmaline, Flower Cut, Transparent

20.5 x 16.1 mm

$ 197.26

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22.73ct Multicolor Pietersite, Oval, Opaque

22.73ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 99.61

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23.18ct White Rainbow Moonstone, Square, Transparent
Rainbow Moonstone Product Video (668712)

23.18ct White Rainbow Moonstone, Square, Transparent

16 x 16 mm (calibrated)

$ 415.57

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41.49ct Brown Tiger'S Eye, Cushion, Opaque

41.49ct Brown Tiger'S Eye, Cushion, Opaque

27.3 x 23.9 mm

$ 41.33

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58.60ct Black Nuummite, Fancy, Opaque

58.60ct Black Nuummite, Fancy, Opaque

38.6 x 32 mm

$ 211.22

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0.33ct Brown Diamond, Round, SI
Diamond Product Video (564636)

0.33ct Brown Diamond, Round, SI

4.5 mm (calibrated)

$ 456.40

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1.52ct Pink Morganite, Round, VS
Morganite Product Video (587280)

1.52ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 97.14

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38.17ct Gray Hematite, Round, Opaque

38.17ct Gray Hematite, Round, Opaque

21.6 mm

$ 41.82

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1.85ct Yellow Diamond, Round, SI
Diamond Product Video (378643)

1.85ct Yellow Diamond, Round, SI

7.5 mm (calibrated)

$ 4,790.76

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15.88ct Pink Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (427407)

15.88ct Pink Kunzite, Pear Shape, VVS-VS

18.5 x 12.3 mm

$ 313.16

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3.29ctw Yellow Golden Beryl, Oval, VVS-VS

3.29ctw Yellow Golden Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 72.09

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55.03ct Pink Rose Quartz, Trillion, Transparent

55.03ct Pink Rose Quartz, Trillion, Transparent

29.2 x 24.5 mm

$ 98.89

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13.59ct Brown Smoky Quartz, Emerald Cut, VVS
Smoky Quartz Product Video (599537)

13.59ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 37.23

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4.55ct Multicolor Fire Agate, Fancy, Opaque

4.55ct Multicolor Fire Agate, Fancy, Opaque

10.7 x 10.2 mm

$ 64.10

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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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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

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

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
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 -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
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
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