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min data

Mineral: quartz
Gem: stone canyon jasper
Size: 29x45 mm & 20x45 mm & 19x40 mm & 26x30 mm
Carat: 100+ ct & 57+ ct & 44.6 ct & 57+ ct
Cut: freeform cabochon(s)
Origin: California
General Info: Jasper is derived from the Anglo-French "jaspre", meaning "spotted stone". Jasper is usually formed from old sediments (or volcanic ash flows) that have been glued (and at times replaced) with silica.

Flow patterns of the original material are often easy to see. Many jaspers are know as picture jasper because they contain what appear to be small images of sand dunes, mountains, plains, and even sky. Since the original materials were likely cross bedded sediments, they often contain the structure they mimic.

Additional Information
A brecciated jasper yellow to mustard yellow jasper glued together with nice white base agate. It may also contain tan, maroon, or green material often in the same piece. It is found in the coastal mountains of central California.

Evidence of multiple fracturing (at different time) can often be found in the material. Stone 1 was first broken to form the brecciate, then glued with white agate. Sometime after the gluing process, the stone was fractured again and filled with a darker material. Hence the blackish line running through portions of he stone. These are not "current fractures", but secondary fractures that were filled at a later date. Similar things can be seen in stone 2 and 3.

All stones cut by author. The first two are frames with black jade and the second two are doublets with black agate backing.

Closeup images of stone canyon jasper Closeup images of stone canyon jasper
Closeup images of stone canyon jasper