Andrew Alden is a geologist based in Oakland, California. He functions as a research guide for the U.S. Geology Survey.

You are watching: What is a streak plate made of


*

Andrew Alden

The good majority the minerals have a white streak. This is the streak the gypsum yet resembles streaks from countless other minerals.


03
of 09

Beware the Scratches


*

Andrew Alden

Corundum pipeline a white streak (left), however after wiping (right) it is clear that the key itself was scratched through the hardness-9 mineral.


04
of 09

Identifying aboriginal Metals by Streak


*

Andrew Alden

Gold (top), platinum (middle) and also copper (bottom) have actually characteristic streak colors, best seen on a black streak plate.


05
of 09

Cinnabar and also Hematite Streaks


*

Andrew Alden

Cinnabar (top) and also hematite (bottom) have distinctive streaks, even though the minerals may have actually drab or black colors.

See more: How Many Ounces Is 15 Cups, Cups And Ounces (Oz) Converter


06
of 09

identify Galena by Streak


Andrew Alden

Galena may resemble hematite in color, but it has actually a dark gray fairly than the red-brown streak.