"These include colored glass, gems, antique heirlooms of pottery or porcelain, stalagmites and stalactites, sea shells, starfish, petrified sea urchins and fossils, and a variety of corals, amber glass, agate, quartz, ores, such as iron, copper and lead, fool's gold, rock crystals, onyx, amethyst and coal, petrified wood and moss." . . . . .