Chrysolopus spectabilis (Common names include Botany Bay diamond weevil, Botany Bay diamond beetle and sapphire weevil) is a species of weevil found in south-eastern Australia. It is up to 25 mm (1.0 in) long, with metallic green patterns on a black background. It is a specialist, only known from 28 species of Acacia. It was discovered during James Cook's first voyage, and became the first insect to be described from Australia.