![]() ![]() Stalactitic formations, as smooth rounded pebbles, and as nodules. It most often is in massive form, but may also be botryoidal, mammilary, and Quartz, and does not occur in visible crystals. ![]() Jasper is a microcrystalline form of the mineral Jasper is usually multicolored or banded. May also refer to any form of opaque Chalcedony in all colors. Silicon dioxide, usually with impurities of iron oxides or organic substances.īrown, yellow, orange, red, green, or blue. Rockhounding in Illinois is a great way to discover the state’s diverse geology and fossilized wildlife. When Jasper is dull and lacking interesting colors or patterns, it is not Jasper but rather Chert.įor additional information, see the gemstone section on Jasper. A wide variety of rocks and minerals can be found in the area including agate, jasper, many geodes, calcite, and even diamond. Jasper is an opaque form of Chalcedony, which is a microcrystalline variety of the mineral Quartz. Pope and Hardin Counties located in Illinois were mined for fluorite deposits commercially for many years, making the state the largest producers of the mineral in the United States. Jasper refers to selected examples of opaque microcrystalline quartz. Some forms of Jasper are banded, and these banded Jaspers may appear similar to Agate, but unlike Agate they are opaque. The southeastern region of Illinois has been known to have enormous fluorite rich deposits especially occurring in veins of limestone rock formations. Jasper is more of a gemological term rather than a name used by geologists. Find nearby businesses, restaurants and hotels. Jasper is usually associated with brown, yellow, or reddish colors, but may be used to describe other opaque colors of Chalcedony such as dark or mottled green and orange. Official MapQuest website, find driving directions, maps, live traffic updates and road conditions. ![]() It is in the Jasper family of rock but presents a cluster of orbs over its surface that are red in tone. It often contains an abundance of impurities, and therefore some regard it as a rock instead of a mineral. Orbicular Jasper is a unique specimen of rock found in the Pacific Northwest. Microcrystalline variety of the mineral Quartz. Jasper is an opaque form of Chalcedony, which is a ![]()
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