This specimen is a custom-cut mini slab of bluestone recovered downstream from the quarry at Craig Rhos-y-Felin located on the northern flank of the Preseli Mountains near Pembrokeshire, Wales. Recent petrographic studies have closely linked chippings from these dolerite bluestones to the bluestones installed at Stonehenge roughly 4,500 years ago.

Each mini slab is unique and varies in size and shape. As pictured, the slab is housed in a small acrylic specimen jar within a glass-topped Riker display case. The case measures 4"x 3 " x 1". A small information card is also included.