Prominent among these are glycerin and succinic acid.
7 succinic acid, 3.2 glycerin and 1.
True amber yields on dry distillation succinic acid, the proportion varying from about 3 to 8%, and being greatest in the pale opaque or "bony" varieties.
True Baltic amber is distinguished by its yield of succinic acid, for many of the other fossil resins which are often termed amber contain either none of it, or only a very small proportion; hence the name "succinite" proposed by Professor.
Whilst succinite is the common variety of European amber, the following varieties also occur: Gedanite, or "brittle amber," closely resembling succinite, but much more brittle, not quite so hard, with a lower meltingpoint and containing no succinic acid.