^ But impure samples have an odor comparable to that of matches. A powerful odor termed "smell of sulfur" truly is offered off by many sulfur compounds, such as hydrogen sulfide and organosulfur compounds. " The 2nd probability is intriguing, according to Chemicool, since sulfur does react strongly with copper. https://fernandoazsmj.techionblog.com/35929414/umbrella-cockatoo-for-sale-uk-an-overview