Replacing magnetron in microwave

My microwave is not heating, find a replacement magnetron but there is a scratch on the insulator of the emitting end. I read that some of these insulator may contain toxic beryllium which is safe when inside ceramic but dangerous when cracked. I wonder if modern domestic microwave ovens still use Beryllium or not (search Panasonic's sustainability site and they claimed that their product didn't use Beryllium except spring alloy), and whether such scratch does matter or not.
https://flic.kr/p/rtYV6p

That looks more like a cracked insulator, rather than a scratch to me. I would not use it. Obtain a replacement, they are not expensive
Most oven Magnetrons still use Beryllium oxide coatings, so don't go licking them

Return it.

Doesn't look like a crack to me, I'd have had it fitted days ago

Now that I zoomed in on the photo with my goggles on, I was wrong, it is just a scratch