Steve Francis -- Here's Your Stolen Gold Chain! J. Prince Shows Off the Goods

Steve Francis is about to feel the pressure ... of his massive gold chain -- which his friend and rap mogul J. Prince got back for him, and is now proudly showing it off for cameras.

Rap-A-Lot Recrords honcho J. Prince held up the chain like a fisherman who bagged a great white shark ... and told the local FOX station in Houston he can't wait to return it to its proper owner.

TMZ Sports broke the story -- Stevie Francis was on stage at a Sauce Twinz show when someone jacked the chain off his neck. As we also first told you ... Steve's pal J. Prince put out word on the street that it better be returned, or else.

The man gets results ... can't argue with that.