Naturally occurring boron is dull, but it can be polished.
Pure boron (a metalloid) is not found in nature. Boron will be combined with something else. Pure boron could be shiny, but will usually be a brown powder when combined with carbon.
a nonmetal because a metal is shiny and strong so a nonmetal is brittle and dull
dull
Shiny
Fluorine is neither dull nor shin, it is NOT a solid. It is an elemental yellow gas, and very poisonous.
it is dull
it is dull
dull
dull
dull
dull
shiny