Earth Materials

Front

What is the hardness of quartz on the Mohs scale?

Back

7

Front

What type of fracture does quartz exhibit?

Back

Conchoidal fracture

Front

What is the crystal system of quartz?

Back

Hexagonal

Front

What is the luster of quartz?

Back

Vitreous luster

Front

What mineral is vitreous, translucent to transparent, has a hardness of 4, and glows under UV light?

Back

Fluorite

Front

How many directions of cleavage does fluorite have?

Back

4 directions of cleavage

Front

What term describes the way a mineral breaks along flat surfaces?

Back

Cleavage

Front

What is the hardness of talc on the Mohs scale?

Back

1

Front

What is the feel of talc?

Back

Soapy feel

Front

Which mineral is NOT a silicate: Quartz, Feldspar, Mica, or Calcite?

Back

Calcite (CaCO₃)