The oyster coats the sand grain with a silvery shiny layer called nacre .
The nacre , or mother of pearl, is the innermost layer, which is composed of thin, alternating, laminae (flakes or sheets) of calcium carbonate and an organic material.
Back down they go for several more years, during which time the oyster instinctively surrounds the injected foreign body with nacre , so building up a beautiful pearl.
Now, researchers have designed a synthetic material that mimics both nacre 's internal architecture and its strength.
They're an oyster's coping mechanism - they coat the irritant with smooth, shiny nacre .
A solitary spot-light illuminates the stage, bathing the floorboards in a nacreous glow.
The distressed surfaces, with their flinty earth tones, cobalt blues and nacreous whites, hold light like rough alabaster.
The dorsal ligament groove is overlain dorsally and flanked laterally by the nacreous middle shell layer.
They suggested that this species is similar in microstructure to modern unionid bivalves, which are externally prismatic and internally nacreous .
Recycled glass tiles emit a nacreous sheen that changes throughout the day.