This unfurling is not cosmetic performance.
It reflects the processing quality directly: a poorly rolled pearl opens too quickly and loses much of its concentrated flavor in the first minute; a well-rolled pearl opens gradually and releases flavor progressively across the full steep. The slow, even unfurling visible in a glass vessel is the same property responsible for Black Dragon Pearls' naturally smooth, layered flavor — the concentration and gradual release are one and the same quality.
