Geography, 31.03.2021 04:00 csciahetano

Many minerals with metallic lusters produce a prominent streak (aka "true color") when rubbed on unglazed porcelain. For example, galena's streak is dark gray (very much like its appearance); however, that is not always the case. Which of the following best describes the streak for metallic gray specular hematite (Fe2O3)? a. red-brown
b. yellow
c. gray
d. black

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