When a little light is able to pass through a mineral, the mineral is said to be

The mineral that some toothpaste may contain is:

Quartz can be used in

Of all minerals___________ are the hardest!

Pencils contain the mineral

Gypsum is used in

By performing a streak test you can find out a mineral's

Most minerals are

Lodestones are magnetic. Long ago they were used :

Sulfur smells like:

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