Current coins are a copper center and Cupronickel surface .Taking into account 90% is an alloy thats ok.
I have found when bringing in scrap silvers the acid test and speed of response color informs tester of quality
and they pay according to there expertise .



Once I brought in some circuit breaker contacts I had from scrap finds . I had seen many on Ebay and figured they were silver also
well my friend at the shop tested and with his skill told me " Some silver and nickel " most important was not enough silver to pay as silver .
Scrap silver at 90% will test out as does a sterling , A honest silver shop knows how to pay .