The sole aim of the following images is to show the two chromatic ranges.
Being a natural material it is impossible to represent the entirety of its colours and shades.
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TThe chromatic range quotgrigio mistoquot (mixed grey) is dominated by grey, grey/brown and grey/green. However, though in lower percentages, there is also purple/red and rust.
The chromatic range quotrosso mistoquot (mixed red) has a mixed grey base with a higher percentage of red, rust, and purple shades.