X
Gemstone Search

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

Loose Untreated Gemstones: Certified Natural Gems for Collectors and Jewelry, Wholesale Untreated Stones

Untreated Gemstones Weight
Untreated Gemstones Size
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
Purple Untreated Gemstones
Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All
  • Actual Product Photos
  • Reliable Quality
  • Full Transparency
  • Large Selection
  • Affordable Prices
  • Fast, Secure Global Shipping
ID: 476802
Weight: 34.00ct
Size: 19 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 122.40
Item in Stock
More Options & Item Details
Add to Cart
ID: 463847
Weight: 12.65ct
Size: 16 mm (calibrated)
Clarity: VS
Content: 1 pc
Price: $ 25.06
Item in Stock
More Options & Item Details
Add to Cart
ID: 619118
Weight: 2.51ct
Size: 10 x 8 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 82.84
Item in Stock
More Options & Item Details
Add to Cart
ID: 705217
Weight: 0.39ct
Size: 4.3 mm
Clarity: SI
Price: $ 13.26
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 497469
Weight: 3.07ct
Size: 8.5 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 15.35
Item in Stock
More Options & Item Details
Add to Cart
ID: 415390
Weight: 1.07ct
Size: 8.1 x 5.2 mm
Clarity: VS
Content: 1 pc
Price: $ 847.44
Item in Stock
More Options & Item Details
Add to Cart
ID: 523835
Weight: 20.59ct
Size: 17 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 163.07
Item in Stock
More Options & Item Details
Add to Cart
ID: 406666
Weight: 14.70ct
Size: 21.3 x 16 mm
Clarity: Transparent
Content: 1 pc
Price: $ 60.35
Item in Stock
More Options & Item Details
Add to Cart
ID: 554146
Weight: 2.55ct
Size: 8.1 x 6.9 mm
Clarity: VS
Content: 1 pc
Price: $ 484.70
Item in Stock
More Options & Item Details
Add to Cart
ID: 573982
Weight: 1.73ct
Size: 8 x 6 mm (calibrated)
Clarity: VS-SI
Content: 1 pc
Price: $ 38.06
Item in Stock
More Options & Item Details
Add to Cart
ID: 501696
Weight: 99.30ct (total)
Size: 64.7 x 20.1 mm
Clarity: Transparent
Content: 2 pcs
Price: $ 393.23
Item in Stock
More Options & Item Details
Add to Cart
ID: 646735
Weight: 15.40ct
Size: 22.4 x 16.3 mm
Clarity: Opaque
Content: 1 pc
Price: $ 9.24
Item in Stock
More Options & Item Details
Add to Cart
ID: 586522
Weight: 29.59ct
Size: 28.1 x 14.9 mm
Clarity: Transparent
Content: 1 pc
Price: $ 195.30
Item in Stock
More Options & Item Details
Add to Cart
ID: 525367
Weight: 1.57ct
Size: 7.2 x 6.4 mm
Clarity: VVS-VS
Content: 1 pc
Price: $ 241.78
Item in Stock
More Options & Item Details
Add to Cart
ID: 366486
Weight: 1.39ct
Size: 8.6 x 5.9 mm
Clarity: VVS-VS
Content: 1 pc
Price: $ 195.17
Item in Stock
More Options & Item Details
Add to Cart
ID: 675204
Weight: 19.68ct
Size: 31 x 16.8 mm
Clarity: Opaque
Content: 1 pc
Price: $ 14.76
Item in Stock
More Options & Item Details
Add to Cart
ID: 402339
Weight: 78.48ct
Size: 32.7 x 31.1 mm
Clarity: Opaque
Content: 1 pc
Price: $ 155.39
Item in Stock
More Options & Item Details
Add to Cart
ID: 310823
Weight: 3.07ct (total)
Size: 4 mm (calibrated)
Clarity: VS-SI
Content: 12 pcs
Price: $ 180.58
Item in Stock
More Options & Item Details
Add to Cart
ID: 650425
Weight: 33.12ct
Size: 27.5 mm
Clarity: Opaque
Content: 1 pc
Price: $ 19.87
Item in Stock
More Options & Item Details
Add to Cart
ID: 399543
Weight: 33.50ct (total)
Size: 31.6 x 14.1 mm
Clarity: Opaque
Content: 2 pcs
Price: $ 64.13
Item in Stock
More Options & Item Details
Add to Cart
ID: 659440
Weight: 12.30ct
Size: 21.2 x 13.1 mm
Clarity: Opaque
Content: 1 pc
Price: $ 29.52
Item in Stock
More Options & Item Details
Add to Cart
ID: 690559
Weight: 4.18ct
Size: 12.2 x 11.6 mm
Clarity: Transparent
Content: 1 pc
Price: $ 98.16
Item in Stock
More Options & Item Details
Add to Cart
ID: 656739
Weight: avg. 6.19 ct / each
Size: 12 x 10 mm (calibrated)
Clarity: Opaque
Price: $ 7.31
Item in Stock
More Options & Item Details
Select pcs
Add to Cart
ID: 485319
Weight: 8.04ct
Size: 15 x 15 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 42.46
Item in Stock
More Options & Item Details
Add to Cart
ID: 514175
Weight: 16.64ct (total)
Size: 14.3 x 11 mm
Clarity: Opaque
Content: 2 pcs
Price: $ 36.25
Item in Stock
More Options & Item Details
Add to Cart
ID: 499380
Weight: 1.99ct (total)
Size: 7.5 x 5.6 mm
Clarity: Transparent
Content: 2 pcs
Price: $ 7.88
Item in Stock
More Options & Item Details
Add to Cart
ID: 390451
Weight: 1.19ct
Size: 9 x 6 mm (calibrated)
Clarity: VS-SI
Content: 1 pc
Price: $ 49.63
Item in Stock
More Options & Item Details
Add to Cart
ID: 541686
Weight: 10.24ct
Size: 18 x 13 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 146.30
Item in Stock
More Options & Item Details
Add to Cart
ID: 603162
Weight: 2.00ct
Size: 8 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 546.48
Item in Stock
More Options & Item Details
Add to Cart
ID: 400909
Weight: 14.76ct
Size: 16.5 x 13.5 mm
Clarity: VS
Content: 1 pc
Price: $ 1,558.66
Item in Stock
More Options & Item Details
Add to Cart
ID: 447532
Weight: 2.36ct
Size: 9.1 x 6.4 mm
Clarity: VS
Content: 1 pc
Price: $ 101.78
Item in Stock
More Options & Item Details
Add to Cart
ID: 410658
Weight: 9.17ct (total)
Size: 12 x 10 mm (calibrated)
Clarity: Transparent
Content: 2 pcs
Price: $ 45.85
Item in Stock
More Options & Item Details
Add to Cart
ID: 366660
Weight: 1.03ct
Size: 7.5 x 5.5 mm
Clarity: VVS
Content: 1 pc
Price: $ 144.62
Item in Stock
More Options & Item Details
Add to Cart
ID: 447674
Weight: 1.59ct
Size: 7.8 x 5.3 mm
Clarity: VS
Content: 1 pc
Price: $ 1,010.23
Item in Stock
More Options & Item Details
Add to Cart
ID: 619204
Weight: 13.45ct (total)
Size: 14 x 12 mm (calibrated)
Clarity: VVS
Content: 2 pcs
Price: $ 56.66
Item in Stock
More Options & Item Details
Add to Cart
ID: 619767
Weight: 10.67ct
Size: 15 x 15 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 53.95
Item in Stock
More Options & Item Details
Add to Cart
ID: 619172
Weight: 32.34ct (total)
Size: 25 x 18 mm (calibrated)
Clarity: Translucent
Content: 2 pcs
Price: $ 85.38
Item in Stock
More Options & Item Details
Add to Cart
ID: 406663
Weight: 17.23ct
Size: 21.5 x 15.8 mm
Clarity: Transparent
Content: 1 pc
Price: $ 70.74
Item in Stock
More Options & Item Details
Add to Cart
ID: 688866
Weight: 4.56ct (total)
Size: 10 x 8 mm (calibrated)
Clarity: Opaque
Content: 2 pcs
Price: $ 20.93
Item in Stock
More Options & Item Details
Add to Cart
ID: 574760
Weight: 3.29ct (total)
Size: 9 x 7 mm (calibrated)
Clarity: VVS-VS
Content: 2 pcs
Price: $ 86.86
Item in Stock
More Options & Item Details
Add to Cart
ID: 390885
Weight: 4.42ct
Size: 10.4 x 9.3 mm
Clarity: VS
Content: 1 pc
Price: $ 237.94
Item in Stock
More Options & Item Details
Add to Cart
ID: 470039
Weight: 22.74ct
Size: 15 mm (calibrated)
Clarity: Opaque
Content: 1 pc
Price: $ 14.18
Item in Stock
More Options & Item Details
Add to Cart
ID: 476874
Weight: 17.48ct
Size: 23.5 x 11.5 mm
Clarity: Opaque
Content: 1 pc
Price: $ 52.44
Item in Stock
More Options & Item Details
Add to Cart
ID: 692709
Weight: 23.46ct
Size: 20 mm (calibrated)
Clarity: VVS
Content: 1 pc
Price: $ 164.22
Item in Stock
More Options & Item Details
Add to Cart
ID: 497474
Weight: 2.54ct
Size: 8.6 x 8 mm
Clarity: Translucent
Content: 1 pc
Price: $ 16.76
Item in Stock
More Options & Item Details
Add to Cart
ID: 485888
Weight: 5.92ct
Size: 14 x 10 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 49.73
Item in Stock
More Options & Item Details
Add to Cart
ID: 660338
Weight: 27.15ct
Size: 19 mm (calibrated)
Clarity: Translucent
Content: 1 pc
Price: $ 54.57
Item in Stock
More Options & Item Details
Add to Cart
ID: 706629
Weight: 30.58ct
Size: 20 x 15 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 914.46
Item in Stock
More Options & Item Details
Add to Cart
ID: 520166
Weight: 45.38ct
Size: 30.4 x 13.5 mm
Clarity: Opaque
Content: 1 pc
Price: $ 53.32
Item in Stock
More Options & Item Details
Add to Cart
ID: 485915
Weight: 6.48ct
Size: 14.8 x 11.7 mm
Clarity: Translucent
Content: 1 pc
Price: $ 54.43
Item in Stock
More Options & Item Details
Add to Cart
ID: 453037
Weight: 5.18ct
Size: 10.4 x 9.8 mm
Clarity: VVS
Content: 1 pc
Price: $ 1,189.74
Item in Stock
More Options & Item Details
Add to Cart
ID: 719345
Weight: 3.24ct
Size: 9.6 x 7.7 mm
Clarity: Transparent
Content: 1 pc
Price: $ 81.00
Item in Stock
More Options & Item Details
Add to Cart
ID: 533010
Weight: 12.50ct
Size: 14 x 14 mm (calibrated)
Clarity: VVS-VS
Content: 1 pc
Price: $ 24.76
Item in Stock
More Options & Item Details
Add to Cart
ID: 346704
Weight: 205.80ct
Size: 55.7 mm
Clarity: Opaque
Content: 1 pc
Price: $ 185.22
Item in Stock
More Options & Item Details
Add to Cart
ID: 387570
Weight: 5.18ct
Size: 13.4 x 9.7 mm
Clarity: VS-SI
Content: 1 pc
Price: $ 333.88
Item in Stock
More Options & Item Details
Add to Cart
ID: 422984
Weight: 69.17ct (total)
Size: 14 mm (calibrated)
Clarity: Opaque
Content: 3 pcs
Price: $ 73.04
Item in Stock
More Options & Item Details
Add to Cart
ID: 674270
Weight: 26.34ct
Size: 25.9 x 17 mm
Clarity: Transparent
Content: 1 pc
Price: $ 474.12
Item in Stock
More Options & Item Details
Add to Cart
ID: 392993
Weight: 4.31ct (total)
Size: 6.9 x 6.7 mm
Clarity: VS
Content: 2 pcs
Price: $ 113.78
Item in Stock
More Options & Item Details
Add to Cart
ID: 396085
Weight: 3.03ct
Size: 7.7 x 7.6 mm
Clarity: VS
Content: 1 pc
Price: $ 148.58
Item in Stock
More Options & Item Details
Add to Cart
ID: 515898
Weight: 1.46ct
Size: 8 mm (calibrated)
Clarity: Transparent
Content: 1 pc
Price: $ 7.70
Item in Stock
More Options & Item Details
Add to Cart
1 2 3
...
5
Choose Page
1 - 780

FAQs

What are loose untreated gemstones?

Loose untreated gemstones are natural stones that have not undergone any artificial treatments or enhancements. Examples include unheated sapphires, untreated rubies, and unenhanced diamonds, which maintain their natural beauty and originality.

Why should I choose untreated gemstones over treated ones?

Untreated gemstones, such as unheated topaz and virgin untreated stones, are valued for their authenticity and rarity. These certified untreated gems are perfect for collectors and those seeking ethically sourced, natural stones for unique jewelry designs.

Are untreated gemstones suitable for engagement rings?

Yes, untreated gemstones like GIA-certified natural gems, unenhanced diamonds, and untreated rubies are excellent choices for engagement rings. They offer timeless elegance and are ideal for creating one-of-a-kind designs that reflect personal style.

What makes rare untreated gems valuable for collectors?

Rare untreated gems for collectors, such as authentic untreated crystals and unheated and untreated stones, are prized for their natural appearance and limited availability. Their untouched state makes them highly desirable and a great investment.

How can I ensure the quality of loose untreated gemstones?

Always choose certified untreated gems, like GIA-certified natural gems, to guarantee authenticity and quality. These stones undergo thorough evaluation to ensure they meet the highest standards, making them ideal for both personal collections and jewelry projects.

What types of untreated gemstones are available?

Our collection includes a variety of untreated gemstones such as unheated sapphires, untreated rubies, unenhanced diamonds, and unheated topaz. Each stone is carefully selected to offer unmatched quality and natural beauty.

Are untreated gemstones more expensive than treated ones?

In many cases, untreated gemstones, like precious untreated gemstones and virgin untreated stones, can be more valuable due to their rarity and natural state. Their unique characteristics make them highly sought after by collectors and jewelry enthusiasts.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

I wish there were options for jewelry settings

Posted By Tim in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Its been a long time since Ive made any purchases Im satisfied with the quality.

Posted By Hard Case in December, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I am never let down by GemSelect. I love that you get the exact stone you want. Shipping is always in a few days. I have spread the word about GemSelect on social media jewelry creating groups that I attend. This sapphire is going to make one gorgeous ring

Posted By Desertchick in April, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Site is easy to navigate - details on cut, polish, and finish work and techniques were helpful. 3d view or wireframe diagram of stones would be nice.

Posted By Tb in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I found what I was looking for...had to look up millimeters to inches. It would be nice to see something, like a quarter, in the pix to show relative size. I plan on buy loose gemstones for every month in the calendar

Posted By TheP in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and convenient

Posted By Butch in September, 2024
Source: Bizrate

Overall Rating -> 8 star ratings

Loved the lot buy options

Posted By BDG in October, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Very good Hoping you will increase your inventory especially in the 6mm Thanks

Posted By Ibie in February, 2025
Source: Bizrate

Why Choose Loose Untreated Gemstones?

Selecting loose untreated gemstones ensures you’re investing in authentic, natural beauty. Gems like unheated sapphires, untreated rubies, and unenhanced diamonds retain their original allure, free from artificial enhancements. These certified untreated gems are ideal for those seeking unique, ethical, and high-quality stones for custom jewelry or collections.

Perfect for Engagement Rings and Collectors

Our untreated gemstones, including GIA-certified natural gems, are highly sought after for engagement rings and collector’s pieces. With options like unheated topaz and virgin untreated stones, you can create a timeless design that reflects your individual style. Each gem is carefully selected for its purity and brilliance.

Rare and Exquisite Natural Gems

From authentic untreated crystals to precious untreated gemstones, our collection offers something for every taste. These rare untreated gems for collectors are perfect for showcasing the natural beauty of stones like unheated and untreated stones that remain untouched by enhancements, preserving their natural value and appeal.

Quality Assurance You Can Trust

Every stone in our selection of loose untreated gemstones is thoroughly inspected to meet the highest standards. Whether you’re looking for untreated gemstones for engagement rings or certified untreated gems for a special project, our collection ensures authenticity and unparalleled quality.

Read All

Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

I wish there were options for jewelry settings

Posted By Tim in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Its been a long time since Ive made any purchases Im satisfied with the quality.

Posted By Hard Case in December, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I am never let down by GemSelect. I love that you get the exact stone you want. Shipping is always in a few days. I have spread the word about GemSelect on social media jewelry creating groups that I attend. This sapphire is going to make one gorgeous ring

Posted By Desertchick in April, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Site is easy to navigate - details on cut, polish, and finish work and techniques were helpful. 3d view or wireframe diagram of stones would be nice.

Posted By Tb in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I found what I was looking for...had to look up millimeters to inches. It would be nice to see something, like a quarter, in the pix to show relative size. I plan on buy loose gemstones for every month in the calendar

Posted By TheP in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and convenient

Posted By Butch in September, 2024
Source: Bizrate

Overall Rating -> 8 star ratings

Loved the lot buy options

Posted By BDG in October, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Very good Hoping you will increase your inventory especially in the 6mm Thanks

Posted By Ibie in February, 2025
Source: Bizrate

FAQ's

What are loose untreated gemstones?

Loose untreated gemstones are natural stones that have not undergone any artificial treatments or enhancements. Examples include unheated sapphires, untreated rubies, and unenhanced diamonds, which maintain their natural beauty and originality.

Why should I choose untreated gemstones over treated ones?

Untreated gemstones, such as unheated topaz and virgin untreated stones, are valued for their authenticity and rarity. These certified untreated gems are perfect for collectors and those seeking ethically sourced, natural stones for unique jewelry designs.

Are untreated gemstones suitable for engagement rings?

Yes, untreated gemstones like GIA-certified natural gems, unenhanced diamonds, and untreated rubies are excellent choices for engagement rings. They offer timeless elegance and are ideal for creating one-of-a-kind designs that reflect personal style.

What makes rare untreated gems valuable for collectors?

Rare untreated gems for collectors, such as authentic untreated crystals and unheated and untreated stones, are prized for their natural appearance and limited availability. Their untouched state makes them highly desirable and a great investment.

How can I ensure the quality of loose untreated gemstones?

Always choose certified untreated gems, like GIA-certified natural gems, to guarantee authenticity and quality. These stones undergo thorough evaluation to ensure they meet the highest standards, making them ideal for both personal collections and jewelry projects.

What types of untreated gemstones are available?

Our collection includes a variety of untreated gemstones such as unheated sapphires, untreated rubies, unenhanced diamonds, and unheated topaz. Each stone is carefully selected to offer unmatched quality and natural beauty.

Are untreated gemstones more expensive than treated ones?

In many cases, untreated gemstones, like precious untreated gemstones and virgin untreated stones, can be more valuable due to their rarity and natural state. Their unique characteristics make them highly sought after by collectors and jewelry enthusiasts.

Enlarged Gemstone Image