No, the word 'lustrous' is an adjective, a word used to describe a noun (lustrous pearls, lustrous smile).

The noun form of the adjective 'lustrous' is lustrousness.

The word 'lustrous' is the adjective form of the noun luster.

It is a characteristic or you can say, property of metalsthat - they are LUSTROUS in nature whereas on the other hand, non-metals possess the property that - they are NON - LUSTROUS in nature.

Thus, metals can be lustrous and non-metals cannot be lustrous in nature(except iodine, which is a non-metal, but is lustrous in nature).