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3 votes
For what purpose is the mineral corundum commonly used?

O A. To make pencils
O B. To make false teeth
O C. To make emery boards
O D. To make drinking glasses

2 Answers

7 votes

Answer:

It's to make emery boards

Step-by-step explanation:

I just took the test

User Smajl
by
8.4k points
4 votes

Answer:

D I guess because grinding optical glass and for polishing metals and has also been made into sandpapers and grinding wheels.

User Lucacelenza
by
8.1k points
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