First row: Lapis-lazuli, polished (Siberia). Amber, rolled pebble (Coast of Baltic Sea). Second row: Amber, polished, showing insects enclosed (Coast of Baltic Sea). Third row: Malachite and Azurite, polished (Arizona). Malachite, polished (Ural Mountains). Fourth row: Malachite, polished (Australia). Malachite (Arizona). AMBER. Few minerals have been longer in favor for ornamental purposes than amber. Among remains of the earliest peoples such as the Egyptians and Cave-dwellers of Switzerland it is found in carved masses indicating that it was highly prized. The Phenicians are said to have sailed to the Baltic for the purpose of procuring it, while the Greeks’ knowledge of it is indelibly preserved in our word electricity derived from their word elektron. The high favor in which the ancients regarded amber has hardly endured however to the present time. Were it not for its use for mouthpieces of pipes and other smokers’ articles and the occasional amber necklace to be seen, amber would hardly be known among the present generation in our country. Amber is a fossil gum of trees of the genus Pinus and is thus a vegetable rather than mineral product. In color it is yellow, varying to reddish, brownish and whitish. Its hardness is 2 to 2.5, it being slightly harder than gypsum and softer than calcite. It cannot be scratched by the finger nail but easily and deeply with a knife. It is also brittle. Its specific gravity is scarcely greater than that of water, the exact specific weight being 1.050-1.096. It thus almost floats in water, especially sea water. It is transparent to translucent. On being heated it becomes soft at 150 degrees and at 250 degrees to 300 degrees melts. It also burns readily and at a low temperature, a fact which has given rise to the name of bernstein by which the Germans know it, and to one of the Roman names for it, lapis ardens. Rubbed with a cloth it becomes strongly electric, attracting bits of paper, etc. As already noted, our word electricity comes from the Greek for amber, this seeming to be one of the first minerals in which this property was noted. Amber being a poor conductor of heat feels warm rather than cold in the hand, contrary to most minerals. It is attacked but slowly by alcohol, ether and similar solvents, a property by which it may be distinguished from most modern gums and some other fossil ones. In composition it is an oxygenated hydrocarbon, the percentages of these elements being in an average sample, carbon 78.94, hydrogen 10.53 and oxygen 10.53. The mineralogical name of amber is succinite, a word derived from the Latin succum, juice. One of its constituents is the organic acid called succinic acid.