Orbicular jasper: Jasper with orbital concentric rings.īumblebee jasper: Yellow jasper from Indonesia. Silex: Yellow and brown-red spotted or striped jasper. Plasma: Dark green bloodstone-like, with white or yellow spots. Moukaite: Pink to light red jasper, typically cloudy. Scenic or Picture jasper: Jasper with patterns resembling a picture or landscape.īiggs jasper: From Oregon, one of today's most common jasper sources.īruneau jasper: From Bruneau Canyon, Idaho, it is prized for its blue "skies". Hornstone: A very fine grained, gray to brown-red jasper. The many varieties are named by collectors to differentiate between them:Īgate jasper: Yellow, brown or green blended, grown together with agate.īrecciated jasper: Jasper in fragments, naturally bonded in a gray material.Įgyptian jasper: Strongly yellow and red jasper.īanded jasper: Jasper with layered structures with wide bands.īlood jasper: Trade name sometimes used for bloodstone. Some of the most notable deposits are sourced from Australia, Brazil, Canada, Egypt, India, Indonesia, Kazakhstan, Madagascar, Mexico, Russia, Uruguay, Venezuela and the United States of America, including Arizona, Arkansas, California, Idaho, Oregon, Texas and Washington. In some cases, jasper may even grow together with agate or opal. Due to these trace impurities, jasper is rarely uniform. Jasper is a dense substance, up to twenty percent of which can be made of foreign materials. Jasper is usually considered a chalcedony, but some scientists classify jasper as a separate type because of its distinctive grainy structure. Iolite can sometimes be mistaken for sapphire and tanzanite, but it is softer than sapphire, and harder than tanzanite. Its strong pleochroic properties can often be used to help identify and distinguish iolite amongst other similar colored gemstones. Gem-quality iolite can vary in color from sapphire blue to violet-like blue and from light-blue to yellowish-gray. It is believed that the Vikings discovered iolite deposits throughout Norway and Greenland. Iolite is also known as 'the Viking stone' because according to Norse legend, Vikings used iolite as a polarizing filter to help them find the sun on cloudy days. 'Dichroite' is another synonym for iolite in reference to its pleochroic ability 'dichroite' is a Greek word which loosely translates as 'two-colored rock'. Furthermore, from the top view down, it can appear light golden or honey-yellow in color. From one direction, iolite can appear sapphire-like blue and from another, it can appear as clear as water.
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