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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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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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89.56ct Yellow Quartz, Oval, VVS
Quartz Product Video (470296)

89.56ct Yellow Quartz, Oval, VVS

36 x 22.7 mm

$ 122.66

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0.99ct Green Tsavorite Garnet, Oval, VS-SI
Tsavorite Garnet Product Video (415864)

0.99ct Green Tsavorite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 542.32

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6.37ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (407845)

6.37ct Yellow Apatite, Emerald Cut, VS

13.3 x 9.8 mm

$ 289.98

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21.24ctw Multicolor Fossil Coral, Pear Shape, Opaque

21.24ctw Multicolor Fossil Coral, Pear Shape, Opaque

20.2 x 11 mm

$ 46.08

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3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque
Lapis Lazuli Product Video (338322)

3000.00ct Blue Lapis Lazuli, Sphere / Ball, Opaque

71 mm

$ 1,774.87

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92.02ct Multicolor Jasper, Oval, Opaque

92.02ct Multicolor Jasper, Oval, Opaque

58.6 x 33.4 mm

$ 45.37

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65.37ct Multicolor Jasper, Cushion, Opaque

65.37ct Multicolor Jasper, Cushion, Opaque

36 x 29.1 mm

$ 55.14

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13.53ct White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (668809)

13.53ct White Rainbow Moonstone, Pear Shape, Transparent

18.1 x 16.7 mm

$ 242.57

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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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25.96ct Multicolor Pietersite, Oval, Opaque

25.96ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 113.76

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0.75ct Green Tsavorite Garnet, Oval, SI
Tsavorite Garnet Product Video (415866)

0.75ct Green Tsavorite Garnet, Oval, SI

6.1 x 4.7 mm

$ 410.85

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3.85ctw Orange Hessonite Garnet, Square, VS-SI

3.85ctw Orange Hessonite Garnet, Square, VS-SI

6.7 x 6.6 mm

$ 70.30

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52.78ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (344385)

52.78ct Pink Rose Quartz, Oval, Transparent

25 x 21.6 mm

$ 78.07

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3.03ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (396085)

3.03ct Yellow Apatite, Emerald Cut, VS

7.7 x 7.6 mm

$ 123.32

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1.06ct Purple Spinel, Pear Shape, VVS

1.06ct Purple Spinel, Pear Shape, VVS

8.9 x 5.4 mm

$ 175.96

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1.18ct Green Tsavorite Garnet, Oval, SI
Tsavorite Garnet Product Video (415398)

1.18ct Green Tsavorite Garnet, Oval, SI

6.5 x 5.5 mm

$ 646.40

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6.65ct Yellow Color-Change Diaspore, Cushion, VS-SI
Color-Change Diaspore Product Video (381560)

6.65ct Yellow Color-Change Diaspore, Cushion, VS-SI

12 x 10 mm (calibrated)

$ 3,131.71

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3.11ctw Multicolor Andalusite, Round, VS

3.11ctw Multicolor Andalusite, Round, VS

3.3 mm

$ 136.73

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0.30ct Green Peridot, Emerald Cut, VVS-VS
Peridot Product Video (527301)

0.30ct Green Peridot, Emerald Cut, VVS-VS

5 x 3 mm (calibrated)

$ 4.06

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6.03ct Black Tourmaline, Heart, Opaque

6.03ct Black Tourmaline, Heart, Opaque

11 x 11 mm (calibrated)

$ 79.83

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44.58ct Blue Larimar, Fancy, Opaque
Larimar Product Video (492337)

44.58ct Blue Larimar, Fancy, Opaque

26.4 x 22.9 mm

$ 483.56

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33.78ct Multicolor Pietersite, Oval, Opaque

33.78ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 111.02

View Gem
11.45ctw Green Tourmaline, Fancy, Translucent
Tourmaline Product Video (472934)

11.45ctw Green Tourmaline, Fancy, Translucent

19 x 10.3 mm

$ 104.54

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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 selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
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

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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