How do I tell CZ from a diamond?
Here is an article for your clients with several tests anyone can do, including the famous “huff” test.
For the cut techies, if you’re wondering what the guys at the simulant companies have come up with lately, here is an example. It is one of their better efforts. It still can’t compare to a natural diamond (and doesn’t come close to ‘A Cut Above’) but they have gotten better at this in the last few decades.

The cut is a bit spready and check the darkness in the 40X image. There is a huge table reflection and darkness even in the star facets. You want contrast in a gem, but this is way too dark. It’s worse in the ideal-scope and ASET photos. Compare them with our ACA below.

A real woman deserves real diamonds. Give a CZ to a fake woman.
Wow Bob! thanks for sharing that. I have a guy today considering a CZ for now…he has a real woman Bob …just not the budget …Its the thought and intention…I know you know that…the way you just talk about your honey…we know
and I have so many customers that are older and have been married for many years who are now replacing that CZ or less then well cut diamond for an ACA — either way this is helpful in aiding them to make the decision; cz or real diamond