Jasper receives its name from the Greek "iaspis", possibly meaning spotted stone. Jasper is an opaque variety of chalcedony, or cryptocrystalline quartz with impurities. Jaspers and chalcedonies, also called agates, make up the two branches of the largest family of gemstones. In jaspers the color and pattern of the stone dictate its properties and virtues.
               Some green varieties of jasper were thought to enable one to control the weather and summon storms and were known as the "rain bringer". In the American south a certain green jasper was much sought after by medicine carriers, root workers and traditional healers as it was said to draw the disease out of a person. When this occurred the green of the stone was said to gain a yellow tint or fade. The color, as well as the good, of the stone could be restored once more by letting it set in sunlight for a time. My own grandmother had three such stones that I now have in my possession and I have personally witnessed this color change several times though I have no way to account for it.
               Black jasper was said to discern forgeries and falsehoods, this may date to its use as a touchstone. Gold would be scrapped across its surface and the resulting color of its streak would enable the individual to tell the purity. This technique is surprisingly accurate in trained hands, according to one report it is possible to define gold content within 1 part in 100. Red was supposed to protect from the bites of snakes, scorpions and other venomous creatures. And the list goes on; with so many types of jasper it could do so indefinitely.

Colors:
Jasper comes in almost any color.                     
Locations:
Jasper is found worldwide
Composition:
SiO2
Hardness:
10


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