Meteorites on Sanibel

One of the most fascinating people we know — Andy K from Fairport NY, whose family has owned a condo here for several decades — wowed us again after his most recent trip down here earlier this month.    
He sent us this photo, along with the following description:

“This is the first of the meteorite photos my brother has shared off his electron scanning microscope.  I found about twenty on a short walk on the beach at Sanibel dragging a powerful magnet.  I collected only about a teaspoon of black dust to bring home.  They are prominent there due to the lack of any other magnetic debris on the beach.  No nearby industrial incinerators pollute the air.  Most meteorites I’ve ever found on one magnet.   We always knew the beaches there were special!”