A gold 100g cast bar from LBMA refiner Metalor. The 100 gram is the main bar size for larger investors - it is quite sizable in terms of value, so multiples of this size bars offer flexibility over larger single bars when your time to sell arrives. Metalor is an LBMA approved, international swiss-based company who are one of the leading suppliers of precious metals in the World. These Metalor Swiss gold bars come complete with a numbered assay certificate as part of its presentation.