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
Heliotrope (building) a garden terrace. The solar panels can be used for sun or rain protection while on the roof terrace. All floors are accessible from the spiral staircase reducing surface loss through hallways and corridors. Further potential for this building design includes plans that were drawn up for a possible Heliotrope Hotel. This project currently has no customers but was designed to show that the revolving design can easily be scaled up. The plans for a rotating hotel have surfaced on several occasions although the financing has not yet been available for its actualization. Heliotrope (building) The Heliotrope is an environmentally