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British and Roman camps, coins and ornaments have been dug up and discussed, especially by the Hon. Mr. Stanley of Penrhos. Pen Caer Gybi is Roman. See Edw. ANGLESITE, a mineral consisting of lead sulphate, PbSO , crystallizing in the orthorhombic system, and isomorphous with barytes and celestite. It was first recognized as a mineral species by Dr.
There are distinct cleavages parallel to the faces of the prism and the basal plane , but these are not so well developed as in the isomorphous minerals barytes and celestite. Anglesite is a mineral of secondary origin, having been formed by the oxidation of galena in the upper parts of mineral lodes where these have been affected by weathering processes.
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