I found this medal today, what does it pertain to? Date? Material? Backstory? Worth anything?

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Found this medal today, like that, on its own. It's quite shiny, in very good shape, but I know nothing about it.

What branch does it pertain to?

Dated to?

Material it's made from?

Backstory?

Worth anything?

Thanks in advance

Queen Elizabeth II issue of the Canadian Forces Decoration (CD).

All members of the Canadian Forces are eligible to be awarded the medal.

No idea when this one would have been made, the first one was presented to HRH The Duke of Edinburgh in August 1954. The first large batch of CD's were struck on 1 April 1955 and would have been issued shortly after.
This issue of the CD will have the members abbreviated rank, surname and initials engraved on the edge of the medal.

From 1955 to 1993 it was struck from tombac, an alloy of 12% zinc and 88% copper.
In June 1993 this was changed to gilding metal - 5% zinc and 95% copper.

From 1993 up until 2007 there were a number of other metals used by private manufacturers, all without the permission of DND. Since 2007 the Royal Canadian Mint has resumed striking the medals and again use gilding bronze.

The medal is awarded for 12 years service, with a bar for each additional 10 year period.

My CD is priceless to me. No idea what someone would pay me if I sold it off.

It looks like a miniature?