Is the coin real silver?

No. The coin is sterling silver plated over a base metal, while the chain is stainless steel. The plating gives the silver look but is a finish, not solid silver.

Can I wear it in the shower or at the beach?

The chain is stainless steel and described as waterproof, so it handles water well. The plated coin is the part to watch; repeated soaking and salt water can dull plating faster.

How long is the necklace?

It measures 20 inches (50.8 cm), which rests around the collarbone on most people. No extender or adjustable length is stated.

Yes, if the person likes coin pendants and vintage-style jewelry. It comes as a single necklace, so check whether a gift box is included before giving it.

Will the chain turn my skin green?

Stainless steel generally does not turn skin green the way brass or copper chains can. The plated coin is the part more likely to show wear over time.