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No. Streak color is distinct of mineral hardness. They are separate properties.
granite
The color is clear, the hardness is the hardest thing in the world, and the luster is pearly.
The same color as the writing from a pencil, very dark grey or black. Pencils used to be made of graphite
hardness, luster, cleavage and fracture, color (not quite useful) and streak
The hardness of a porcelain streak plate will vary between 6.5-7.5 on the Mohs hardness scale.
Streak and Mohs hardness are descriptive and identifying terms for minerals. Because sandstone could be composed of a multitude of different rock particles or minerals, a specific hardness or streak cannot be attributed to them.
No. Streak color is distinct of mineral hardness. They are separate properties.
No. Streak color is distinct of mineral hardness. They are separate properties.
granite
Diamonds are the hardest substance on Moe's Hardness Scale and as such don't have a determined streak color (since streak is determined usually by a clay tablet of hardness ~3)
A streak plate has hardness of 7 on the Mohs scale, so harder minerals will not leave a streak. Diamond has a hardness of 10 and corundum is 9 - so neither will leave a streak.
Minerals with a hardness greater than around 7 on the Mohs hardness scale will not leave a streak on a standard unglazed porcelain streak plate. They will instead scratch and powder the streak plate.
The color is clear, the hardness is the hardest thing in the world, and the luster is pearly.
Streak is the color it makes when two minerals scratch against each other. Hardness is just how hard the mineral is
Well. You can do many things like use the Mohs Hardness Scale or determine the hardness by the streak.
The same color as the writing from a pencil, very dark grey or black. Pencils used to be made of graphite