A vug in the limonite matrix is the host for a layer of rich green, almost velvety, botryoids of conichalcite, to .5 cm across. This is a calcium, copper, arsenate. Secondary growth of colorless, lustrous, translucent, rhombs of calcite, to 2.0 cm across, has nearly filled up the remaining space in the vug. Good combo and super color contrast! 6.5 x 5.5 x 5.4 cm