Abstract: A socket assembly is provided for receiving and retaining a head of a fastener. The socket assembly includes a socket body having a longitudinal interior chamber defined by interior walls. The interior chamber extends axially within the socket body to a receiving end of the socket body. The interior walls of the interior chamber are configured to a shape of the head of a fastener for receiving the head of the fastener at the receiving end. A magnet is disposed within the interior of the socket body. The magnet is selectively movable in an axial direction within the interior chamber of the of the socket body. A fastening member is radially engaged to the socket body. The fastening member is configured to releasably secure the magnet within the socket body at a selected axial position in relation to the head of the fastener inserted within the receiving end.

Abstract: A system for laser marking a gemstone (10) is provided. A pulsed laser (20) generates a laser pulse (40) which is then directed towards a focusing element (60) through optical means (30). Lens (60) focuses the laser pulse into focused pulse (70). The focused pulse (70) is projected onto a surface of gemstone (80) which is mounted in fixture (90). A computer control system (110) allows a user to input and control a predetermined path of displacement between the gemstone (80) and the focused laser pulse (70).