Imperial Jasper Rough Rock Stone Slab
This natural unpolished lapidary stone slab is lovely Imperial Jasper and it is 5.8 inches by 3.9 inches and 4.5 mm thick.
It weighs .26 lbs. and is shown wet in the first 2 pictures.
Imperial Jasper comes from north of the border between Jalisco and Zacatecas, Mexico about 50 miles north of the city of Guadalajara.
Both Royal Imperial and Imperial Jasper are found on the east side of a steep canyon covered in thick vegetation.
This scattered jasper area covers over 3.5 miles long with several different deposits and types of Jasper.
Imperial Jasper is found in large veins and bigger pieces.
The material is considered a fine porcelain jasper and it makes wonderful patterned, unique cabochons with a great polish.
The Greek origin of the word jasper, iaspis, means "spotted stone." This form of semiprecious chalcedony, or microcrystalline quartz, is usually red, brown or green. Its patterns are much less regular and defined than those of the other chalcedony variety, agate. Another difference between the two is that jaspers are generally opaque, while agates tend to be translucent (or at least contain translucent bands).
Jasper is a form of Chalcedony. Jasper usually refers to an opaque stone, with a solid color or an irregular display of colors caused by various mineral impurities. The named is derived from the Greek word that means spotted stone.