2006-09-28 09:22:50 · 3 answers · asked by Info Pirate 1 in Science & Mathematics ➔ Earth Sciences & Geology
The color of the mineral can be deceiving. Using a combination of factors such as the streak, color, crystal size, weight, etc. is the best way to decipher exactly what mineral you have.
2006-09-28 09:32:28 · answer #1 · answered by Olive Green Eyes 5 · 1⤊ 0⤋
Streak is the powdered form of a mineral. Over time, minerals can change color naturally. As stated in the previous answer, it is best to test the other properties of a mineral (specific gravity, luster, hardness, fracture/cleavage, etc.) with streak.
2006-09-28 10:04:01 · answer #2 · answered by Adam L 1 · 0⤊ 0⤋
Exactly.
Pyrite, for example, resembles gold and has a gold color. But, when scratched on a streak plate, it is a green or greenish brown.
Hematite can be black, gray, and even very shiny silver. But its streak is a very distinctive red.
I'll bet this is in your book too. Its in mine and my book is over 30 years old.
2006-09-28 12:12:28 · answer #3 · answered by Tom-PG 4 · 1⤊ 0⤋