Amber is another ingredient I could just wikipedia for, but chose not to.

It obviously is a type of rejected violin rosin. Reddish brown in color, it gave the violinist such a wonderful control of tone that soon everyone within earshot felt a wee bit swoon-y. Kisses were soon to follow when - the violinist would burst into flames!

Luckily, the violin and bow were always ok.

And that is why amber is now used in perfume.