There are about 150 fossil (Latin fossilis – excavated) sorts of resin. From non-organic minerals fossil sap differ because they‘re made up of only three chemical elements: carbon, oxygen and hydrogen. During XVII – XVIII centuries when mining was on the rise, in brown carbon clusters first of all, later in other sediments various fossil sap sorts were found that varied greatly by their chemical characteristics. Most of the fossil sap was found in the Northern hemisphere, Europe and America during XX–XXI centuries. Also more and more of them are now found in Asia, Africa and South America.
Fossil resin called amber has been found on the seashores of the Baltic and Northern Seas since long time ago. The main characteristics of this resin were restricted to color, clarity, combustibility and ability to get electrified when rubbed. For a long time resin that had similar characteristics was considered amber. Some mineralogists as little as 25-30 years ago attributed simetrite and rumenite found in the Carpathian region to the six sorts of Baltic amber – sukcinite, gedonite, stantentite, glesite, bekerite and crancite.