Why is color a useful property for identifying malachite, but not quartz?

Quartz can come in many different colors and shapes idk about malachite but i know that about quartz!

Explanation:

Streak is a more reliable property than color because streak does not vary. Minerals that are the same color may have a different colored streak. Many minerals, such as the quartz in the Figure above, do not have streak. ... The streak of hematite across an unglazed porcelain plate is red-brown. Malachite (MAL-uh-KYT), an ore of copper, is green. Color, however, is the least useful property for mineral identification. One reason is that many minerals have similar colors. ... Another reason not to rely on color alone is that some minerals can change color in various circumstances.

hope this helps Can I have brainilist pls thx :)

1 digestive system

2 stomach

3 bladder

4 carbon deoxide

5 tiger