Demonstrates irregular breakage of minerals.

Each specimen illustrates a type of mineral breakage that does not leave a smooth cleavage surface. The set is housed in a compartmented collection box, and an identification list is included.

Contents: 6 numbered samples, 1×1"
Even Fracture - Halite
Uneven Fracture - Agate
Conchoidal Fracture - Obsidian
Subconchoidal Fracture - Rose Quartz
Splintery Fracture - Satin Spar Gypsum
Hackly Fracture - Copper