Question

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

Answer 1

Answer:

a. red-brown

Explanation:

Specular Hematite is a mineral which is found in rocks and soils. The crystal of specular hematite is greyish black in color but it can form the streak of reddish color which is due to the presence of iron oxide. It has metallic luster which gives a look like silver and has shiny flakes.