It certainly looks copper clad from the edge pics.
Don't scrape it on the 1 in a billion chance it's silver why on earth would you intentionally damage it.
Weigh won't damage it, and will be conclusive
KM-164 Silver (.900) - 6.25 g - ø 24.26 mm
KM-164a Copper-nickel clad Copper - 5.67 g - ø 24.26 mm
-----Burton
50+ year / Life / Emeritus
ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club
Owned by three cats and a wife of 40+ years (joined 1983)
Author: 3rd Edition of the Sample Slabs book,
https://www.sampleslabs.info/