These are also known as realistics, which happens to be the term I prefer. Realistic buttons are very self-explanatory in the fact that they look like a 'real' object. There are many different types and materials of these, and many came is sets!
One of my most popular sellers are the flowers. In the center photo above, there are flowers of glass, plastic and celluloid! I have some that are extruded Celluloid and even have a few paper mache!
I have a particularly nice one that I have been able to find little to no information on as of yet, so I've been holding onto it for a few years. This one is a porcelain or ceramic dill pickle and is advertising for the Heinz Company.
PS: If you ever happen to see anything in any of my blog posts that you may be interested in, please email me! I am more than willing to create listings for anyone who would like something specific and have done this countless times in the past.
Until next time,