Bismuth Trioxide

Bismuth(III) oxide is perhaps the most industrially important compound of bismuth.

It is also a common starting point for bismuth chemistry.

It is found naturally as the mineral bismite (monoclinic) and sphaerobismoite (tetragonal, much more rare), but it is usually obtained as a by-product of the smelting of copper and lead ores.

Bismuth trioxide is commonly used to produce the “Dragon’s eggs” effect in fireworks, as a replacement of red lead.