Red hexagonal prisms of vanadinite. One crystal shows two interesting features. One is that it is partly hollow. The other is that only three adjacent sides of the hexagon have prism faces. The other three sides join up with the pinacoid on the top of the crystal. There is botryoidal white opaque calcite on the back of the specimen. This exhibits a faint green response under shortwave ultraviolet light. Width of view 6mm. Stack of 70 images.
Click on the image below for a higher resolution version.
