Abstract: An embodiment of an isolation member cooperates with an isolation member seat to isolate a well first portion of an earthen well drilled into the earth's crust from a well second portion and comprises an interior chamber to receive an explosive charge. The explosive charge may be surrounded by a filler material that is resistant to deformation. A pressure sensor, a circuit, and a battery are also received into the chamber. The isolation member material may comprise one of zirconium oxide, aluminum oxide, bulk metallic glass, silicon nitride or tungsten carbide, and the isolation member is resistant to deformation within the isolation member seat under the application of a substantial pressure differential across the isolation member and isolation member seat. Detonation of the explosive charge fragments the isolation member to prevent the isolation member from presenting an obstruction to subsequent well operations. A safety fuse may be included to enable safe handling and transport.