Magnesite from Cedar Hill Quarry, Lancaster County, Pennsylvania, USA

Nice specimen piece of Magnesite from Cedar Hill Quarry.

The piece consists of white Magnesite with an off-white tan mineral which has been labelled by the collector as 'Deweylite'.

I am not 100% convinced this is accurate, so I've chosen to sell this piece as Magnesite only. I suspect its Chalcedony.