Zinc Oxide Burning Off as a Blue Flame

Pictured is a blue flame caused when Zinc vapour and oxygen reacts when heated to ?around 1000 ?C (in combination with other elements such as copper, silver, gold, hydrogen and nitrogen).

Zinc (Zn) decomposes into Zinc Oxide (ZnO: zinc vapor and oxygen) at around 1975 Â ?C with a standard oxygen pressure. In a carbothermic reaction, heating with carbon converts the oxide into zinc vapor at a much lower temperature (around 950 Â ?C). (Source: Wikipedia)

Zinc Oxide Burning Off as a Blue Flame