Which of the following is not a true statement about mineral properties?
A) Color is the most obvious property of a mineral but it can be unreliable since many minerals occur in multiple colors
B) Corundum is typically a cloudy, translucent, brown or blue mineral
C) If a small amount of graphite is added corundum, it converts this mineral into a gemstone called a diamond
D) If a small amount of chromium is added corundum, it converts this mineral into a gemstone called a ruby
E) If a small amount of iron or titanium is added corundum, it converts this mineral into a gemstone called a sapphire

Question

Quizplus · Accepted Answer

Adding a small amount of graphite to corundum does not convert it into a diamond. Diamonds are formed from carbon under extreme heat and pressure, not from corundum with added graphite.

Which of the Following Is Not a True Statement About