The word 'gold' is a name of a yellow metal that is highly valued. It is widely used for making jewelry, for example. The word 'gold' is a noun but we can also use it as an adjective.
There is another adjective derived from 'gold' — 'golden'. Nowadays we often use both words to describe something made of gold. But to be more precise, these adjectives have a difference in meaning.
π« a gold ring = ring made of gold
π« a golden ring = ring the colour of gold
The same thing happens with some other adjectives. For example π
π a silk blouse = blouse made of silk
π silky hair = hair which feels like silk
π a stone path = made of stone
π a stony look = cold look like stone