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The good majority the minerals have a white streak. This is the streak the gypsum yet resembles streaks from countless other minerals.
Beware the Scratches
Corundum pipeline a white streak (left), however after wiping (right) it is clear that the key itself was scratched through the hardness-9 mineral.
Identifying aboriginal Metals by Streak
Gold (top), platinum (middle) and also copper (bottom) have actually characteristic streak colors, best seen on a black streak plate.
Cinnabar and also Hematite Streaks
Cinnabar (top) and also hematite (bottom) have distinctive streaks, even though the minerals may have actually drab or black colors.
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identify Galena by Streak
Galena may resemble hematite in color, but it has actually a dark gray fairly than the red-brown streak.