Hardware consisting of a buckle, a tip and one or two keepers (the piece that holds or "keeps" the strap of the belt in place) is usually called a "Ranger Set".

Sterling Silver
and 14 kt or 18 kt
Gold Ranger Sets
by Clint Orms
$495.00 and up

Hitched Horsehair belts by Jeff Sailors
$325.00 and up

"Sweetheart Vermeil Collection" --
Buckles start out in sterling silver, then are triple-dipped in 14 kt gold

$495.00 to $995.00

Original gold buckle designs by:
Doug Magnus, James Reid, David Dear, Edward Bohlin, Jeff Deegan -- in 18 kt and 14 kt gold

$1800.00 to $5000.00