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No, not rare, although the first one is obscure. It’s from Ethiopia and is the Military Medal Of Merit Of The Order Of St. George. That’s the saint doing his dragon-slaying thing on one side and the Trinity Star on the other, with the ribbon in Ethiopia’s colours. Produced in bronze by Mappin & Webb of London. You might expect to get $50 or so for it, but you'll sometimes see them on fleabay at twice that.
The second is a souvenir Vatican medallion of Pope John Paul II, which will be late 20th or early 21st Century. It doesn’t look like silver but, even if it were, it would only really have melt-down value.
The third is a rather crude modern imitation of a Syracuse decadrachm coin from the 5th/4th Century BC. Head of Arethusa surrounded by dolphins and a charioteer being crowned by Nike. It’s possible that might be silver but, if it is, again it won’t have much more than melt-down value.