Blue lace agate. Cut and polished specimens are at top left, polished specimens are at right and a specimen in its natural state is at bottom left. Agate is silica (silicon dioxide) that precipitated from liquid inside existing rock. These successive layers of precipitation are seen as the deposited silica fills hollows in the rock.

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TOP06672664

Source:

達志影像

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RM

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須由TPG 完整授權

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