The black pearl And Newton's prism color and iridescence

THE PRISM SEPARATES LIGHT INTO ITS DIFFERENT WAVELENGTHS, SPLITTING WHITE LIGHT INTO ITS COMPONENT COLORS

Light passing through a transparent prism breaks down into six colors visible to the human eye.The prism systematically breaks down the different wavelengths of white light in the same way, resulting in the perception of six distinct colors.

ARAGONITE REACTS TO SEVERAL DIFFERENT WAVELENGHTS

Under white light, opaque material will always send back the same single wavelength resulting in the same single color.Because aragonite is transparent, more than one wavelength is sent back 

CONSTANTLY CHANGING COLORS

A film of aragonite is in fact a network of conchiolin containing a huge number of aragonite crystals pile up and form prisms which are then covered over by a different substance. The sensitivity of these different components to a given wavelength causes the refraction of the corresponding colors.

A PEARL’S DEEP HUE COME FROM THE THICKNESS OF ITS ARAGONITE

Champagne, blue gray, peacock, green, bronze, purple … it all depends on the variety of oyster and the richness of the nutritive elements to be found in the waters it lives in.

AT THE SURFACE, INTERFERENCE OF THE DIFFERENT WAVELENGHTS CAUSES IRIDESCENCE

The transparent films of aragonite generate wavelength interference.This means that the eye sees several different colors simultaneously, producing the vibrating sensation known as iridescence.