No two crystalline pots have ever looked the same, and no two ever will. The crystals that grow inside my glazes form through a process governed by chemistry but shaped by chance — the same way snowflakes are identical in structure yet never in pattern. Understanding why requires looking at the microscale events that unfold inside a kiln in the dark, over the course of many hours, at temperatures that would incinerate almost anything organic.
Crystal growth begins with nucleation — a point where a few zinc silicate molecules, cooling and slowing, find each other and begin to bond in the orderly geometric pattern that defines the crystalline structure. This first bond is the seed. From it, more molecules attach in the same pattern, and the crystal grows outward in a radial burst. Where exactly nucleation occurs on a given piece — and when, and how many nuclei form — depends on subtle variations in the glaze surface, the temperature gradient within the kiln, trace impurities in the materials, even the position of the piece relative to the heating elements. None of these variables are fully controllable. You can only create the conditions that make nucleation likely.
The size and shape of the resulting crystals depend on how long the kiln holds within the growth window and how stable the temperature remains during that hold. A slow, stable hold produces large crystals with long, well-defined arms. A hold that fluctuates — a few degrees up or down, caused by atmospheric variation or element inconsistency — can interrupt growth, produce branching, or cause multiple nucleation events to occur where only one was expected. These "accidents" often produce the most interesting surfaces: overlapping crystals, interrupted formations, areas where two growth events met and merged. I've learned to recognize these patterns and to value them, but I cannot produce them on command.
Color adds another layer of variability. Metal oxides behave differently at different points in the temperature range: cobalt is stable and consistent, but iron and copper shift dramatically with small temperature changes, producing colors that range from amber to olive green or from turquoise to deep sea blue depending on the atmosphere and the cooling rate. Two pieces glazed from the same bucket, fired in the same kiln, can emerge in entirely different color registers. This is the part of crystalline work that took me the longest to accept — that the outcome is always, at some level, not up to me. The kiln is a collaborator. Every piece is a negotiation.