Engagement Puzzle Ring with Trillion-Cut, Lab-Created Alexandrite in Platinum and 14K Rose Gold

A trillion-cut, lab-created alexandrite graces a 14K rose gold and platinum puzzle ring.
A trillion-cut, lab-created alexandrite graces a 14K rose gold and platinum puzzle ring.
Our First Ever Trillion-Cut Alexandrite Engagement Puzzle Ring in Platinum and 14K Rose Gold
Side view of a triangle-cut, lab-created alexandrite on a platinum and 14K rose gold engagement puzzle ring
This is the teal color change from purple in our alexandrite, whether genuine or lab-created

Engagement Puzzle Ring with Trillion-Cut, Lab-Created Alexandrite in Platinum and 14K Rose Gold


  • Description
  • Guaranteed Fit
  • Engagement Ring Delivery
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Our first-ever trillion-cut gemstone mounted on a platinum and 14K rose gold engagement puzzle ring is breathtaking!

It is difficult to find a genuine trillion (also known as trilliant or triangle) cut alexandrite with a blue/purple to teal/green color change. But the lab-created alexandrite in this ring appears purple under incandescent or photographic lighting, and then it appears as a teal blue or green color in daylight. Very costly genuine alexandrites may have different colors, and some of the lower quality ones change from red to green rather than purple/green.

A working puzzle ring, styled after legendary Celtic knotwork rings, this ring comes apart and goes back together easily with the video, animated, and written instructions we provide under a tab on this page. Your puzzle ring will be hand-woven, in contrast to the majority of puzzle rings which are cast from molds. Our brilliant puzzle ring artist will hand-weave your engagement ring precisely for the stone that you select, its very shape and size, so your puzzle ring will be a true, one-off original.

Gemstone size: The lab-created alexandrite on this medium-weight puzzle ring is roughly 1/2CT; the specific size is 5mm x 5mm and 0.55CT. You may select from two additional sizes:
6mm x 6mm, 0.93CT which requires a slightly heavier puzzle ring
7mm x 7mm, 1.5CT, which requires a medium-heavy puzzle ring.
Please contact Mandira if you would like to see photographs of the two heavier weights.

Precious metal combination: The base price on this page is for this ring with 14K rose gold and platinum. Platinum is denser than gold and palladium, therefore heavier, and it stays whiter longer without polishing. Platinum is the most durable metal over the long term. When it is scratched, it doesn’t lose metal, so when polished after scratching, you haven’t lost anything. Over the years, platinum is the most long-wearing, and we set this ring up so platinum is the outer metal for most of the circumference of the ring, thus protecting the rose gold.

Ring size: Select from whole, half, and quarter sizes 3 – 9.5. Other sizes are available upon request.

Puzzle ring weave: This ring is shown with a standard weave. You may select a tight or open weave, instead. If you wish to pair the ring with a single shadow band, we recommend choosing an open weave. Standard or tight weave rings are better for dual shadow band ring guards.

Your puzzle engagement ring will be artisan-crafted and custom hand-woven in the U.S.

When you use our ring sizer prior to our making your ring, we guarantee your fit. You may order the sizer before you order your ring. Or when you order your sizer at the time of your ring order, we’ll hold your order until you confirm your size by email. 

Once you’re used our sizer, if we deliver your ring, and it does not fit, we pay for the round-trip shipping for your free ring resize or replacement within the U.S. and provide a discount for overseas shipping.

There are two ways to request our sizer:
1. Order your ring sizer for a modest fee before you order your ring(s): Order your ring sizer here.
2. Request a sizer as part of your order at the time that you order your ring(s), and we will hold your order, send your sizer, and wait for an email from you with your size(s).
In either case, we will mail a ring sizer to you promptly. This is a physical, plastic set of rings in whole and half sizes that you can play with until you are certain you have a correct size. And if you find one plastic ring is too big and one is too small, we can make a quarter size for you. Please follow our included instructions for best fit.

Guaranteed U.S. delivery: Order by Wednesday evening, any week, with FedEx Express (Two Day) shipping, and receive the engagement ring two weeks from the following Friday, i.e. Friday two weeks later. Please contact Mandira for out-of-U.S. delivery times.

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Lab-Created, Trillion-Cut Alexandrite Size

Puzzle ring size (3-9.5)

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