search
  • Sign In
    Sign Up
  • English speaking customer support only

    1-800-464-1640

    International:

    +66-39601289

  • Change Language
  • USD
  • CART
FREE SHIPPING

Buy 18 - 20 mm Quartz With Marcasite Gems

(17)
18 - 20 mm Quartz With Marcasite Gems Weight 18 - 20 mm Quartz With Marcasite Gems Size 18 - 20 mm Quartz With Marcasite Gems Clarity 18 - 20 mm Quartz With Marcasite Gems Price 18 - 20 mm Quartz With Marcasite Gems Origin
More
18 - 20 mm Quartz With Marcasite Gems Single
18 - 20 mm Quartz With Marcasite Gems Pairs
18 - 20 mm Quartz With Marcasite Gems Lots
18 - 20 mm Quartz With Marcasite Gems Faceted
18 - 20 mm Quartz With Marcasite Gems Cabochons
Sort By:
Clear All
Photos are of Actual Products for Sale

12.42 ct Fancy Quartz With Marcasite, 18.7 x 16.6 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 12.42 carat weight Quartz With Marcasite

12.42ct1 Piece
$ 68.31
18.7 x 16.6 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 12.42 ct Quartz With Marcasite
Quartz With Marcasite Shape: Fancy Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18.7 x 16.6 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

14.28 ct Trillion Quartz With Marcasite, 19.1 x 22.4 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 14.28 carat weight Quartz With Marcasite

14.28ct1 Piece
$ 78.54
19.1 x 22.4 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 14.28 ct Quartz With Marcasite
Quartz With Marcasite Shape: Trillion Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 19.1 x 22.4 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

19.23 ct Baguette Quartz With Marcasite, 19.5 x 15 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 19.23 carat weight Quartz With Marcasite

19.23ct1 Piece
$ 105.77
19.5 x 15 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 19.23 ct Quartz With Marcasite
Quartz With Marcasite Shape: Baguette Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 19.5 x 15 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

11.98 ct Oval Quartz With Marcasite, 18.6 x 13.7 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 11.98 carat weight Quartz With Marcasite

11.98ct1 Piece
$ 76.96
18.6 x 13.7 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 11.98 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18.6 x 13.7 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

4.54 ct Marquise Quartz With Marcasite, 18 x 8.4 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 4.54 carat weight Quartz With Marcasite

4.54ct1 Piece
$ 29.96
18 x 8.4 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 4.54 ct Quartz With Marcasite
Quartz With Marcasite Shape: Marquise Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18 x 8.4 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

12.37 ct Oval Quartz With Marcasite, 18.9 x 13.5 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 12.37 carat weight Quartz With Marcasite

12.37ct1 Piece
$ 81.64
18.9 x 13.5 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 12.37 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18.9 x 13.5 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

14.87 ct Oval Quartz With Marcasite, 19.3 x 13.1 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 14.87 carat weight Quartz With Marcasite

14.87ct1 Piece
$ 98.14
19.3 x 13.1 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 14.87 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 19.3 x 13.1 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

16.86 ct Oval Quartz With Marcasite, 19.8 x 15.7 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 16.86 carat weight Quartz With Marcasite

16.86ct1 Piece
$ 111.28
19.8 x 15.7 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 16.86 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 19.8 x 15.7 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

13.9 ct Oval Quartz With Marcasite, 18.9 x 12.7 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 13.90 carat weight Quartz With Marcasite

13.90ct1 Piece
$ 91.74
18.9 x 12.7 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 13.90 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18.9 x 12.7 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

8.86 ct Oval Quartz With Marcasite, 18.2 x 12.2 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 8.86 carat weight Quartz With Marcasite

8.86ct1 Piece
$ 58.48
18.2 x 12.2 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 8.86 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18.2 x 12.2 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

11.56 ct Oval Quartz With Marcasite, 18.5 x 12.3 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 11.56 carat weight Quartz With Marcasite

11.56ct1 Piece
$ 76.30
18.5 x 12.3 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 11.56 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18.5 x 12.3 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

12.65 ct Oval Quartz With Marcasite, 18.3 x 12.1 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 12.65 carat weight Quartz With Marcasite

12.65ct1 Piece
$ 83.49
18.3 x 12.1 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 12.65 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18.3 x 12.1 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

9.82 carat Pear Quartz With Marcasite, loose Certified Quartz With Marcasite from Brazil, Natural Untreated Gem, 18 x 13.6 mm

Natural Quartz With Marcasite, Qty: 1 pc | 9.82 carat weight Quartz With Marcasite

9.82ct1 Piece
$ 64.81
18 x 13.6 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 9.82 ct Quartz With Marcasite
Quartz With Marcasite Shape: Pear Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 18 x 13.6 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

17.42 carat Pear Quartz With Marcasite, loose Certified Quartz With Marcasite from Brazil, Natural Untreated Gem, 20 x 18.4 mm

Natural Quartz With Marcasite, Qty: 1 pc | 17.42 carat weight Quartz With Marcasite

17.42ct1 Piece
$ 114.97
20 x 18.4 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 17.42 ct Quartz With Marcasite
Quartz With Marcasite Shape: Pear Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 20 x 18.4 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

11.77 ct Oval Quartz With Marcasite, 19.4 x 12.5 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 11.77 carat weight Quartz With Marcasite

11.77ct1 Piece
$ 77.68
19.4 x 12.5 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 11.77 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 19.4 x 12.5 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

23.18 ct Square Quartz With Marcasite, 19.2 x 18.7 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 23.18 carat weight Quartz With Marcasite

23.18ct1 Piece
$ 152.99
19.2 x 18.7 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 23.18 ct Quartz With Marcasite
Quartz With Marcasite Shape: Square Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 19.2 x 18.7 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart

11.88 ct Oval Quartz With Marcasite, 19.5 x 12.2 mm From Brazil

Natural Quartz With Marcasite, Qty: 1 pc | 11.88 carat weight Quartz With Marcasite

11.88ct1 Piece
$ 78.41
19.5 x 12.2 mm
Item Description
Stone Type: Loose Quartz With Marcasite
Quartz With Marcasite Weight: 11.88 ct Quartz With Marcasite
Quartz With Marcasite Shape: Oval Cabochon Quartz With Marcasite
Quartz With Marcasite Size: 19.5 x 12.2 mm Quartz With Marcasite
Quartz With Marcasite Color: Multicolor Quartz With Marcasite
Quartz With Marcasite Clarity: Transparent Quartz With Marcasite
Quartz With Marcasite Origin: Brazil Quartz With Marcasite
Quartz With Marcasite Treatment: None
Quartz With Marcasite Quantity: 1
Quartz With Marcasite Certificate: GemSelect
Product Description:
View Details
Add to Cart
Read All

Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

After having looked at other purchasing sites, this is my first choice.

Posted By MJC in January, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I bought a small ring green so I may practice my jewelry making.

Posted By HairyOtter in July, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to find the stones I was looking for. Always good quality stones

Posted By Erin in June, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

blessed be the lord blessed be the saved blessed be the work blessed be the traveled i write down my good times in these stones and when times are gray i can still se the sunny days refract in these stones

Posted By Kickbass.2 in May, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Pleasant.

Posted By Mk in November, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use as always and in all steps from opening site to paying.

Posted By Pete in February, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Very good, very fast, everything as described.

Posted By B in October, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Best place to buy gem stones, dont bother shopping else where. Prices are great, no issues with shipping and customer service is the best.

Posted By J in December, 2023
Source: Bizrate

Overall Rating -> 9 star ratings

I was in the market for birthstones for a lil gift project im doing. I'm no expert in gems or what not but the quality as far as i can tell seems to be spot on.

Posted By PixelComposer in January, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

The website is very easy to use. The search function, filter and sort functions are very helpful.

Posted By Sboro in August, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use,I have spent many hours looking at the site

Posted By Skip in November, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

great. thank you

Posted By Carrotroller in July, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Love the variety of stones, sizes and the prices

Posted By Dorita in March, 2024
Source: Bizrate
STAY IN TOUCH | NEWSLETTER
*You're signing up to receive GemSelect promotional email.
Partners and Trust Payment options

Switch to Mobile Version

Copyright © 2005-2024 GemSelect.com all rights reserved.

Reproduction (text or graphics) without the express written consent of GemSelect.com (SETT Company Ltd.) is strictly prohibited.

8130

Continue Shopping
Checkout
Continue Shopping
Checkout