Some minerals have color because of what they do to light that passes through them or reflects from their surfaces. There are thousands of different minerals of which certain varieties of about 15 ...
Translation of: Die Formen der Farben. https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!296444~!0#focus ...
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