There are also resins, a volatile oil and several other constituents.
It is an excellent solvent for gums, resins, fats, &c.; sulphur, phosphorus and iodine also dissolve in it.
Amber has often been imitated by other resins like copal and kauri, as well as by celluloid and even glass.
Many other fossil resins more or less allied to amber have been described.
In recent years the growth of the leaf under cloth tents has greatly increased, as it has been abundantly proved that the product thus secured is much more valuable - lighter in colour and weight, finer in texture, with an increased proportion of wrapper leaves, and more uniform qualities, and with lesser amounts of cellulose, nicotine, gums and resins.