Guide
Gold guide
Purity, physical form and weight are how gold is described. None of them is a GXLD offer, and none of them proves that a gram in an account is a particular bar.

Fineness
Gold purity
Fineness is parts per thousand. A higher number does not prove title, authenticity or a GXLD product.

Forms
Forms of gold
Bars, coins, granules and jewellery are physical forms. A gram balance is an ownership record, not another shape.

Weight
Weight and measures
Grams, kilograms and the troy ounce. Gross weight and fine gold are different quantities.