This is a classic "menagerie" piece featuring an array of insects, including fungus gnats, phorid flies and midges, a small beetle, a termite wing, and assorted botanical detritus.  The large fungus gnat featured in the main image is missing part of his abdomen -- evidence of prehistoric predation/foraging behaviour after this insect was stuck in the amber!  Transparent pale yellow amber with spots of orange.  A lovely piece!