The munsell rock color chart provides a durable, accurate method for classifying and evaluating rock color samples
The Munsell rock color chart helps geologists and archaeologists communicate with colors more effectively by cross-referencing iscc-nbs color names and the unique Munsell alphanumeric color symbols of rock color samples.The rock color chart is a revision of the previously published rock color chart of the geological society of America (GSA).

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 M50315B Munsell Rock Color Chart