gold
The word 'oro' is a masculine noun in Spanish. It translates to 'gold' in English. It is commonly used to refer to the precious yellow metallic element, highly malleable and ductile, and not subject to oxidation or corrosion. 'Oro' is also used in various expressions and phrases in Spanish language. For example, 'vale su peso en oro' literally means 'worth its weight in gold', used to describe something very valuable.
I'm looking for the map of the lost gold.
This sentence uses 'oro' within a larger noun phrase to talk about a classic trope from adventure stories: a map to hidden treasure.
Gold is a precious metal.
This phrase is a simple declarative sentence using 'oro' to refer to the precious material known as gold. It states a common fact about gold.
What material is your ring made of? It's made of gold.
In this dialog, 'oro' is used to describe the material a given object (a ring) is made of. It's common in Spanish to use 'de' followed by a material to state what something is made out of.