Rokk grey stoneware clay ~ grogged / coarse

Rokk grey grogged stoneware has been developed for sculptural applications and for outdoors pieces, the high grog content provides a beautiful textured surface and excellent handling qualities. Depending on the firing temperature this body takes on a range of grey hues. To retain a 'cool grey', fire at 1200C or below. The grey hue can become 'brownish' above this temperature and certain glazes will emphasise this.

I would always advise to test how your clays and glazes interact with each other.