| An example of a mineral that can be found in Chek Jawa is a chert - a compact flinty chalcedony (explanation below). |
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A chalcedony (Greek chalkedon, possibly from Chalcedon, in Asia Minor) is a beautiful mineral composed of silica, usually banded, translucent, of waxy lustre, generally white or bluish-white, apparently amorphous (meaning: without definite shape or structure), but consisting of crystallined fibres.