Half a small tub of powdered green clay - old and opened (Westbury Fields BS9)

Powdered green clay, no idea of brand as I took it out of the packaging and put it into this tub a few years ago. It can be used internally or externally but considering its age and as it has been opened for some time I would think this is only suitable for using externally. Mug for sizing only. Tub about 8cm high and 6cm across and it about half full I would say