Typically small sharp stone impact

Characteristic “star” (aka radial) crack

Crack extends fully through the outer glass ply (surfaces one and two)

Typically small blunt rock/debris impact

Characteristic “bullseye” flaw, may see surrounding star crack

Crack is on surface one of outer ply, may extend to surface two of outer ply

Larger blunt object like hail or stone

Sharp impact on surface one

Long cracks “running” from a central point

Crack is commonly on inner ply surface four, sometimes on outer ply surface two