“Fir needle concrète is further treated with alcohol to produce an Absolute of Fir Needles which when it comes from American suppliers is a dark green, semi-liquid or syrupy mass of sweet-coumarinic, somewhat fruity and intensely balsamic odor; briefly, it is very true to nature. The absolute of fir needles from French suppliers is usually a syrupy, amber-brown, clear liquid which has an odor more balsamic and sweet than pinelike and of great tenacity.”
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (p. 290).