Can fire stone make magmar elvove in Pokemon sliver?

You're likely thinking about Magmar and Magmortar, not Magmar Elvove.

Here's the correct information:

* Magmar evolves into Magmortar using a Fire Stone.

This applies to all Pokémon games, including Pokémon Silver.

So, yes, a Fire Stone can make Magmar evolve into Magmortar in Pokémon Silver.