I have just aded a section about Baltic amber
Ant in Baltic amber, photographed with Mitutoyo M plan apo 20x objective. Baltic amber are said to be from 44 million years ago. If you want to photograph insects or other amber inclusions you have to chose carefully to find nice objects that are close to the surface. A water dipping objective and submerging the amber in glycerol can give you a better result but sometimes you can alos use normal microscope objectives. Read more on the page Photographing Baltic amber inclusions.