The only way I can describe what amber smells like is to tell you its a warm, resinous scent that can produce a faint prickle at the back of the nose. Its rich and earthy.
Vegetal amber - the hardened resin from tree sap - is fragrant when ground or warmed.
In perfumery the smell can vary greatly as generally Amber is produced synthetically. Your own exploration with amber fragrances is testament to the diversity of amber interpretations in a fragrance.
Amber Narguile, Gaultier2 and Rochas Absolut are all excellent examples of where you'll easily recognise amber.