As other mentioned, your coin is a fake, made in China by counterfeiters.
Here is what a real one looks like:
http://www.cdncoin.com/kb_results.asp?ID=38The numbers 1921 on your coin does not even come close to the real example.
Here is a news talking about a collector who a member on this forum trying to stop fakes such as yours. They also discuss about 1921 50 cents fakes.
http://cnews.canoe.ca/CNEWS/Canada/...296-sun.htmlNo need to waste your time getting appraised. Hope you did not overpay thinking it was real!