Which of the following are covered under plate glass insurance policy?

The policy covers the cost of accidental breakage of insured glass by any reason, except those that are specifically excluded. Some of the exclusions are:- 

Fire or explosion Earthquakes or such other convulsion of nature Damage to frames Cost of removal or replacement of any fittings or fixtures necessitated for replacing the broken glass Cracked or imperfect glass Any superficial damage or scratching