Raw gold is gold that has not been certified or registered. Raw gold is very hard to market because its purity has not been proven. All gold used as money or stored by a bank or individual should have a proven provenance. This will usually be via a certification from an organisation such as the London Bullion Market Association.
Because gold can now be used as money via the global digital payments system it is important that it is LBMA certified. Raw gold should not be used as money.