Fineness and Pureness

Bullion Bar Fineness (pureness)

Gold and Silver can be mixed/alloyed with many other metals, hence the higher the precious metal % content in a Bullion Bar, the purer it is. The purer the Bullion Bar the more expensive it is in weight.

Millesimal fineness is a system of denoting the purity of platinum, gold and silver alloys by the 'Parts Per Thousand' of the pure metal by 'Mass' in the alloy.


GOLD Fineness

The karat is a fractional measure of purity for gold alloys, in parts fine per 24 parts whole.

Gold purity is determined 'post-refining'.

Naturally there are varying refining standards and refining methods and technologies used in the industry around the world.

In general the minimum worldwide accepted fineness of Gold is 995.0 (99.5%).


Central Bullion Gold Investment Bullion Bars are of the highest % or 'part per 1000, hence the purest of form of GOLD at 999.0 (99.99%).



SILVER Fineness

Silver purity is determined 'post-refining'.

Naturally there are varying refining standards and refining methods and technologies used in the industry around the world.

In general the minimum worldwide accepted fineness of Silver is 925.0 (92.5%).

Any silver used for investment, or trade on metal and commodities exchanges must be 99.9 % pure, or 999.0, sometimes referred to as “three nines fine.”

Sterling silver used in jewellery, for example, has a purity of 92.5 %. Thus, silver jewellery is often stamped with 925.

Silver Coins minted for general circulation generally use silver with a purity commonly ranging from 80% to 92.5%, Collectible coins up to 95.8% and investment Bullion Coins at 99.9%.


Central Bullion Silver Investment Bullion Bars and Coins are of the highest % or 'part per 1,000, hence the purest of form of SILVER at 999.0 (99.9%).