when thou seest the Matter white as Snow, and shining like orientall gemms. The white Stone is then perfect
Abraham establishes the White Stone as the completed product of the albedo, defining its attainment through Trithemius’s phenomenological criterion of snow-white luminosity and citing Artephius’s synonyms — paradisiacal stone, white sulphur — for the spiritualized, whitened body.
, A Dictionary of Alchemical Imagery, 1998thesis