Chalcedony to as prase. However, the term prase is also used to describe green quartz, and to a certain extent is a color-descriptor, rather than a rigorously defined mineral variety.) Blue-colored chalcedony is sometimes referred to as "blue chrysoprase" if the color is sufficiently rich, though it derives its color from the presence of copper and is largely unrelated to nickel-bearing chrysoprase. Heliotrope is a green variety of chalcedony, containing red inclusions of iron oxide that resemble drops of blood, giving heliotrope its alternative name of bloodstone. In a similar variety, the spots are yellow instead, known as plasma. Moss agate
Mineral, Washington Historic Places) a resort with fishing docks and boat/pontoon rentals and two bed and breakfast facilities. Mineral affords views of Mount Rainier. The community takes its name from nearby Mineral Lake. Mineral is most noted as a fishing destination. The lake is stocked yearly with rainbow trout and other fish species. On the opening weekend of Washington's fishing season, the town more than triples in population due to the influx of anglers. As many as 200 boats easily fit on the lake. The local catch-phrase is "Mineral Lake, home of the 10 pound trout." Mineral is the location where one