You are describing use values that are found in the intrinsic physical properties of gold by human agents. Their societies then assent to recognizing those use values. That value is not intrinsic to gold itself—it is not one of gold’s properties.

Thinking “gold is valuable” is a shorthand for this recognition of use and exchange values on the basis of gold’s intrinsic physical properties. But the value found in those properties is not a property of gold itself.