Polished amber cabochon from Myanmar.
It is approx. 23x14x5mm. in size and weighs 1.3gms.
there is a cicada leaf hopper visible inside.

Wikipedia says:
Burmese amber, also known as Burmite or Kachin amber, is amber from the Hukawng Valley in northern Myanmar. 
The amber is dated to around 100 million years ago, during the latest Albian to earliest Cenomanian ages of the mid-Cretaceous period. The amber is of significant palaeontological interest due to the diversity of flora and fauna contained 
as inclusions, particularly arthropods including insects and arachnids but also birds, lizards, snakes, frogs and 
fragmentary dinosaur remains.