Roncari Quarry babingtonite and prehnite specimens are among the most desirable and difficult to obtain in good specimens as combination mineral species from the Eastern United States. This outstanding miniature from the Ed David Collection features lustrous, black babingtonite crystals to 2.0 cm pleasingly complimented with translucent, sea-green prehnite balls on a matrix of colorless calcite rhombs. Classic combination material.