This is one of my favorite jaspers. it is a large size hand cut Noreena Jasper Gemstone set in a heavy gage split shank ring design.
This ring is a size 8 3/4 but can be sized from a 7 to a 10. The stone itself measures 28 by 23 mm or just over 1 by 7/8 inches.
Noreena Jasper is a silicified pelite (mudstone) that is rusty red, mustard yellow, and cream/grey in color. A bursting fire caught in stone, Noreena Jasper channels endurance, willpower, and focus. This energetic stone captures the element fire within its vibrational frequency.
Jasper is an opaque form of Chalcedony, which is a microcrystalline variety of the mineral Quartz. It often contains an abundance of impurities, and therefore some regard it as a rock instead of a mineral. Jasper is usually associated with brown, yellow, or reddish colors, but may be used to describe other opaque colors of Chalcedony such as dark or mottled green and orange. Some forms of Jasper are banded, and these banded Jaspers may appear similar to Agate, but unlike Agate they are opaque. When Jasper is dull and lacking interesting colors or patterns, it is not Jasper but rather Chert. - See more at: http://www.minerals.net/mineral/jasper.aspx#sthash.KsFIRXyW.dpuf