>>11450208Sorry OP, /sci/ is only for freshmen college students larping as SCIENTISTS!
No one here actually knows geology and regardless you can't tell what type of rock it is just from a picture.
Minerals are not restricted to set colors.
Usually you do test for hardness, cleavage, and streak. Then you examine it for color and luster, Theirs also an chemical test that determines how it reacts when certain chemicals are applied to it.
What i'm saying is, the process for identifying that rock is actually quite long because many rocks are almost identical and it's all about finding the slight differences in order to identify it.
t. someone who took geology in high school
