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
A Tribe Called Red well as performing festival dates in the United Kingdom, Germany and Greece. They have been featured on CBC Radio's "Q" and "Canada Live", and have been playlisted on both CBC Radio 2 and CBC Radio 3 as well as BBC Radio 6 Music. In 2014, they garnered two Juno Award nominations at the Juno Awards of 2014, for Breakthrough Group of the Year and Electronic Album of the Year, winning the award for Breakthrough Group. The band specifically chose not to submit themselves for consideration in the Aboriginal Album of the Year category. A Tribe Called Red have also collaborated