Galena, Maryland the lead ore known as galena. There is, however, no geological evidence for galena deposits on Maryland's eastern shore, and the story is likely apocryphal. Galena is home to a variety of small businesses for its size. Along with many antique shops, there is a diner, confectionery shop, convenience store and deli, organic and healthfoods market, pizza parlor, and recording studio, and wedding videography studio. As of the census of 2010, there were 612 people, 271 households, and 169 families residing in the town. The population density was . There were 284 housing units at an average density of .
Mineral ore of zinc, or cassiterite (SnO), an ore of tin. Gems are minerals with an ornamental value, and are distinguished from non-gems by their beauty, durability, and usually, rarity. There are about 20 mineral species that qualify as gem minerals, which constitute about 35 of the most common gemstones. Gem minerals are often present in several varieties, and so one mineral can account for several different gemstones; for example, ruby and sapphire are both corundum, AlO. Minerals are classified by variety, species, series and group, in order of increasing generality. The basic level of definition is that of mineral species,