One of the most heart stopping moments of my life was walking into our house after a long day out at work to find it entirely filled with acrid black smoke. That morning I had been using a magnifying mirror to put on my make-up, standing near the window for the light. I plonked it down on the window sill and rushed off. The low winter sun hit the mirror which concentrated the light beam onto the edge of my curtains. They were completely charred and melted onto the carpet, but luckily they were nearly brand new JL fire retardant. The old pair before them, inherited from Mum, would have caught fire and probably burnt the house down. I now treat magnifying mirrors with great care, shutting them into drawers every time they are used. Not quite the same as crystals, but a story worth passing on just in case.