What is the dark material on the white cups? Three cups in pieces 1951–2000 wear the same look in three grammars: 1951 in bold sandy veins, 1957 in full marbled smears, 1977 in falling streaks — dark grey-brown grit riding through or over pale glaze, often textured proud of the surface, sometimes salted with pale flecks.
The term groups these cups by the look they share — dark grit riding through or over pale glaze — not by a named material. Sparser gritty speckle belongs to the registry’s sand-speckled term instead; these are swaths and gestures, not pepper.
See it on real pieces
1951, 1957, 1977 — or browse the dark-smears listing.
Each piece page links to its live listing on the Shopify store.