Depending on how much of each color it varies from Brown,Bluish-green,Gray,or dark gray.
Bluish-gray, usually. Sometimes white if fully oxidized.
Nickel leaves a silver-gray streak. Note that nickel is an element.
The colors of green and cyan can make either a greenish-bluish color or a bluish-greenish color. The exact color would depend on how much of green or cyan is used.
deep blue or bluish green
brownish, bluish colour
they are a bluish gray color
Technetium is bluish in colorsilvery gray
It looks bluish gray.
Bluish, removes the yellow.
Gray
Depending on how much of each color it varies from Brown,Bluish-green,Gray,or dark gray.
They are usually a light or dark blue color or even gray with a bluish tint like usual....
The colors teal and purple make a blueish gray color.
it can be white or gray but the word is STREAK
They were reported to be a blueish-grey colour.
No, there is no correlation between color and hardness in minerals.