Stone throw hole I – Polished glass

Mechanic spot load – short-term – medium dynamics

Type of glass	Polished glass, figured glass, rolled sheet glass, all monolithic glass.
Examples	Break-in with a heavy thing (hammer or similar); Cobblestone, brick throw.
Beginning	At the centre
Lines of process	Irregular hole; A very bulky web; From direct to angular fissure lines at the centre from the hit spot; Break lines often last till the edge.
End	In the middle of the glass or at the glass edge.
Other features	Depending upon the size of the tossed thing and the energy of the hit, the openings of different sizes; Often secondary crack occur.

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