Listing your Keyring:-

zodiac@zodioc:~$ gpg --list-secret-keys
/home/zodiac/.gnupg/secring.gpg
-------------------------------
sec 1024D/C1DA93D0 2010-02-10
uid celsius thomas (sample demo key)
ssb 2048g/4352773F 2010-02-10

sec 1024D/56B304BA 2010-04-03
uid Celsius Thomas (My work key)
ssb 2048g/6D422200 2010-04-03

zodiac@zodioc:~$ gpg --list-public-keys
/home/zodiac/.gnupg/pubring.gpg
-------------------------------
pub 1024R/881574DE 2009-03-10
uid Launchpad PPA for Bisigi

pub 1024D/C1DA93D0 2010-02-10
uid celsius thomas (sample demo key)
sub 2048g/4352773F 2010-02-10

pub 1024D/56B304BA 2010-04-03
uid Celsius Thomas (My work key)
sub 2048g/6D422200 2010-04-03