Princess Cut Square Cubic Zirconia Loose Stone

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Lifetime Guarantee

On All Ziamond Gems

Our princess cut square man made lab created laboratory grown diamond simulant cubic zirconia loose stones are geometrically square in shape and have a radiant faceting pattern that makes this shape modern and brilliant. Each of our diamond quality princess cut cubic zirconia are made with the finest Russian formula rough materials that are hand cut and hand polished to 104 brilliantly sparkling facets. They are expertly hand cut and hand polished by diamond cutters to stringent diamond standards. Choose your preferred size among the options listed. If you do not see the size you are looking for, we offer custom stone cutting services via special order. Simply e-mail us at with your exact requirements, and we will provide you with a quote. If you would like us to duplicate your diamond, for travel or insurance purposes, simply send us a copy of your written appraisal with the dimensions of your stone, and Ziamond will hand cut a replica cubic zirconia loose stone to those exact dimensions. There are no returns on all loose stones, they are a final sale, see the policies page for our terms and conditions.


  • Large selection of carat sizes available, see menu options - .25 ct. 3mm, .50 ct. 4mm, .75 ct. 5mm, 1 ct. 6mm, 1.50 ct. 7mm, 2.50 ct. 8mm, 4 ct. 9mm, 5.50 ct. 10mm, 7 ct. 11mm, 8.50 ct. 12mm, 10 ct. 13mm
  • 104 brilliant facets
  • Cut and polished to genuine mined diamond specifications
  • Larger carat sizes available
  • Handmade in the USA
  • Custom stone cutting services via special order - simply call, live chat or email us 
  • Questions? Live Chat with representatives or call 1-866-942-6663

The Ziamond Distinction

  • Lifetime Guarantee on all Ziamond gems
  • Finest high quality hand cut, hand polished Russian formula lab created diamond look cubic zirconia
  • Available in various colors of lab created stones - white diamond look, canary yellow diamond look, pink diamond look, red ruby, blue sapphire and green emerald
  • Wear, care and clean like genuine mined diamonds
  • Over 100 years combined fine jewelry experience, on-line for more than 20 years 
  • Experienced and knowledgable staff ready to assist with your questions or custom designs
23 reviews
  • Beautiful stone 5

    Posted by Gina Sarin on Nov 13th 2023

    After some research, I went with a Ziamond stone for my engagement ring. I had a setting and my jeweler set this stone into it. Even the jeweler was amazed at the quality. Thank you Ziamond.

  • Set this in my engagement ring 5

    Posted by Francine Johns on Jul 31st 2023

    Bought the perfect setting with real diamonds but set the Ziamond princess cut in the middle. Looks amazing, no one can tell and we literally saved thousands of dollars.

  • I was hoping it would look this good and it did 5

    Posted by Jenna G. on Oct 20th 2022

    All I can say is Ziamond saved me a lot of money and they came through with a beautiful princess cut stone for me.

  • Beautiful alternative 4

    Posted by Maranda on Aug 20th 2021

    I received the Ziamond product in a very timely manner. I am very impressed with the quality of the product. Once I have it mounted in my wedding ring, I think the end result will be fabulous. I am very pleased there is an inexpensive alternative to diamond replacemnt on the Internet. Thank you,!

  • Thrilled 5

    Posted by Fran on Mar 5th 2020

    After spending HOURS on the internet looking for the perfect stone for an engagement ring, we're thrilled to have found this site! We were able to get exactly what we were looking for! Ziamond offered a princess cut that we were unable to find anywhere else. The stone arrived in a timely manner, and was exactly what we had expected. Kudos to Ziamond for making the ordering process user-friendly enough so that even those of us who are not well versed in gems had a clear idea of exactly what we were ordering!

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