| 7hlkmr ((BYSSOLITE included CALCITE)), $10 MINIMUM BID, Keystone Traprock Quarry, Cornog, Chester County, Pennsylvania, 4.5 x 3 x 2 cm, Miniature | |
 | cleaved rhomb of dark green Calcite. Color is from the Byssolite inclusions. It looks opaque but backlight shows the transluscent Calcite included by a multitude of Byssolite threads. |
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