How Common is it?
Hardness
100

What is the most common igneous rock?

What is Basalt?

200

Which of the following elements is NOT found in rocks?

Potassium, Sodium, Silicone, Netherite

Netherite

200

Which of the following is a method used to determine the hardness of a mineral? Scratching with a penny, tasting the rock, smashing it with a hammer

What is Scratching with a penny?

300

Which of the following is a rare earth element?

Neodymium, Silicone, Quartz, Sandstone

Neodymium

300

Which of the following minerals has a hardness scale of 8? Topaz, Diamonds, Talc, Or Obsidian?

What is Topaz?

400
The Most Common element found in rocks

Oxygen

400

Tell me the least hard Mineral on the MOHS Scale

Talc

500

The Second most common element found in rocks

Silicon

500
Tell me the Exact hardness on the MOHS Hardness scale of Diamonds.

10

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