Name two non metals which are lustrous

Lustre is a property commonly associated with metals rather than non-metals. However, there are certain non-metals that can exhibit a degree of lustre under specific conditions. Two examples of non-metals that can display some lustrous properties are iodine and graphite.

Iodine: Iodine is a non-metallic element that typically appears as a purple-black solid. When heated, it sublimes and forms a violet vapor. In its solid crystalline form, iodine can exhibit a shiny, metallic lustre.

Graphite: Graphite is a form of carbon and is considered a non-metal. While most forms of carbon, like diamond, are not lustrous, graphite is an exception. Graphite consists of layers of carbon atoms arranged in a hexagonal lattice, and these layers can slide over each other. This structure allows graphite to have a characteristic metallic or shiny appearance.

It's worth noting that the lustre exhibited by iodine and graphite is not as pronounced as that of most metals.