In the case of the enamel i can only speak for the topic starting ring i have in hands.
This is real glas enamel. I have tested it of course with a hot (very hot) needle.

And, to be sure there are no missunderstandings.
Showing this new fake on the marked has nothing to do with the ring shown by Byz. This is a slightly different pattern and i have no doubts in it wink

�Eine gewaltt�tige, herrische, unerschrockene, grausame Jugend will ich. Jugend muss das alles sein. Schmerzen muss sie ertragen. Es darf nichts Schwaches und Z�rtliches an ihr sein. Das freie, herrliche Raubtier muss wieder
aus ihren Augen blitzen."