Doña Tierra
Collection No. 07 — Burnished Black
San Bartolo Coyotepec · 1953

Fired Black,
Polished by Hand

Iron-rich clay burnished with a single quartz stone, then starved of oxygen until it turns to graphite. No glaze. No colour. Only sheen.

A study in matte, gloss, and the silver that lives between them
This is the Oaxaca Barro Negro design system, applied by Curio Design — a design-style library for AI agents. Full Oaxaca Barro Negro guide → designbycurio.com/learn/oaxaca-barro-negro-pottery