Ancient mid-latitude Mar's covalent bonded ice?

[cph]

Might ancient mid-latitude Mar's ice be covalently bonded? Would 1-2 billion year old ice have much greater density then, compared to Earth ice? So drilling into Mars' ice, compared to drilling into Earth ice, and measuring relative difference in voltage/ampere as a proxy for relative density? Could one bring back a cube of Mars ice, without melting? Also wouldn't such guessed at Mars ice sink in water? Would it super cool your drink?

 

[brother time]

The ice is supposed to be carbon the freezing point for this is 3773 kelvin. this is easy to keep cold but hard to melt.
cheers, BT