Amber is the name for fossil resin or tree sap that is appreciate for its colour and beauty. It is used for the manufacture of ornamental objects and jewellery. Although not mineralized, it is sometimes considered a gemstone. Most of the world's amber is in the range of 30โ90 million years old. Semi-fossilized resin or sub-fossil amber is called copal. It can hold insects or even small mammals. It can also be found in a few different colours; the usual orangey yellow that is associated with amber, green amber and even blue which is highly sought after.