Spider Web Imperial Jasper is a variety of Imperial Jasper that has an abundance of lines in its pattern. These types of lines, sometimes referred to as "streamers", are found in all the fine jaspers (Willow Creek, Morrisonite, etc.) but are very common in this variety of Imperial.
     Streamers are formed when the jasper is fractured, which results either from stress or shrinkage. These fractures are then filled in and sealed with more jasper. An endless variety of patterns can result with subtle shifts in the color of the jasper filling these voids.  

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