White Asian Pin Brooch

I first thought this was plastic, now I am not sure. Bought in a jewelry estate lot.

 

To me, it looks cut and not cast.

From your last photo.

The rest, I cannot tell what material it is.

 

I agree, it is cut. It could be bone.
These were also made in ivory, but the pin is not what I would expect on an ivory brooch.

 

Potential for "French Ivory" with the straight lines?

 

I considered that too, but I thought French Ivory would be cast (or similar), not cut.
kraft, are there lines in/on the material?

 

Looks like Galalith (casein ivory) to me.

 

Took some closeups, hope it will help. I can always take it to a jeweler.

 

I also noticed the pin attachment is not sloppily glued like other costume jewelry.

 

I see little black dots on the sides, that says bone to me, JMHO.

 

Thank you Marie!