This section is from the book "Amateur Work Magazine Vol6". Also available from Amazon: Amateur Work.
Santo Domingo is one of the few places in the world where amber occurs in any quantity. The bulk of the supply comes from the vicinity of Konigsberg, on the Baltic seacoast. There it occurs in the lower oligocene, and appears to have been deposited originally in glau-conitic beds of clay, which was afterward eroded by wave action and the amber distributed, though much of it is taken from beds in which it was originally deposited. Amber is simply fossilized rosin, derived apparently from certain coniferous trees. The conditions under which it occurs in Santo Domingo do not appear to differ substantially from the Baltic seacoast. It is found near Santiago city, associated with lignite, sandstones and conglomerates. These beds probably belong to the oligocene formation and are found containing amber at a number of places on the north coast, as well as on both flanks of the Monte Cisti range. It also frequently occurs in the streams flowing through these beds. The amber is usually in ovate lumps, from the size of a pea to a man's fist, often flattened, dull on the exterior, being covered with a kind of brownish crust.