1/18/2024 0 Comments Different types of jasper stoneIn the fourth century, it was called the great "rain-bringer," and it has been thought to strengthen the stomach and cure gynecological troubles. The gem was a favorite in the ancient world, and the name jasper can be traced back in Hebrew, Assyrian, Persian, Greek and Latin. Its polish might wash away in water, so clean with a soft, dry cloth. Jasper is often sealed with petroleum products. The Greek origin of the word jasper, iaspis, means "spotted stone." Jasper has a dull luster but takes a fine polish, and its hardness and other physical properties are those of quartz. Jasper derives its colorful patterns from other minerals present, and is often named according to its pattern. Two popular "jasper" gemstones, rainforest jasper and leopardskin jasper, are actually rhyolite. Rhyolite gemstone beads can look very similar to jasper, but rhyolites are igneous rock that is chemically identical to granite. Although the term jasper is often applied to unidentified stones, true jaspers are metamorphic rocks. Jasper contains microscopic "grains" of crystalline quartz and agate has microscopic "fibers" of crystalline quartz. This distinction stems from the stones' composition. Another difference between the two is that jaspers are generally opaque, while agates tend to be translucent (or at least contain translucent bands). Its patterns are much less regular and defined than agate, the other chalcedony variety. Jasper is a semiprecious chalcedony (or microcrystalline quartz), and is usually red, brown or green.
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