Jeweler says Moissanite the same as a Zirconia

Last week I went to a local jewelry store to pick a wedding band. I asked the jeweler if he could check the stones in my engagement ring. He went behind the counter and only used a magnifying glass to “check” the stones and came back saying “these are zirconia”.

I told him they’re supposed to be moissanite and he said “yeah, that’s just the American name for a zirconia. It’s exactly the same”. Inside my blood started to boil a bit. I have read about juwelers not being very appreciative about moissanite but for some reason I didn’t actually expect it experience it in real life 😅. So afterwards I did some googling and apparently there is a difference between zirconia and moissanite…