Kids' Habitat
SDNHM Home
Visitor Information

MINERAL MATTERSMINERAL MATTERS
HOW TO IDENTIFY MINERALS

Introduction
Color
Streak
Transparency
Luster
Hardness
Cleavage
Fracture
Specific Gravity
Crystal Form

Mineral Matters
Regional Minerals

Fracture

Malachite Not all minerals cleave easily. Some fracture instead. Unlike cleavages, which are usually clean, flat breaks, fractures can be smoothly curved, irregular, jagged or splintery.

The most common types of fracture are conchoidal (quartz) , fibrous or splintery, hackly (copper), uneven or irregular.

The sample of malachite shown here has a conchoidal fracture; it's smooth and curved.



Mineral Matters | Kids' Habitat

©  San Diego Natural History Museum