Amber has been appreciated for its color and natural beauty since "Neolithic" times. Good quality amber is used for the manufacture of ornamental objects and jewelry. There are five classes of amber, defined on the basis of their chemical constituents.
Because it originates as a soft, sticky tree resin, amber sometimes includes animal and plant material as inclusions. http://en.wikipedia.org/wiki/Amber
Originated from a small fishermen village, for centuries Riga has been an important part of the trade chain between Russia and Western Europe. A lively crossroad of cultures and backgrounds for over 800 years, the historical centre of Riga has accumulated an impressive cultural baggage and today is justly included in the UNESCO’s World Heritage list.