Type of plastic amazing brooch set?

[dpsparkle]

This is an amazing set. Not sure if celluloid?  Any info appreciated. 

[notjustcollectibles]

hello,
Could you upload a picture so we can see it?
Thanks!

[dpsparkle]

[dpsparkle]

Added pictures. I actually have 2 sets. Thanks in advance for any assistance.

[birdonawire27]

Definately Celluloid.  It is sensitive to heat which causes it to craze.

If signed "japan" they are likely Occupied Japan pieces.