i think it's ice cubes. on my pc the photos looked too dark to tell, but on my partner's laptop they appear light enough to see. no, the photos might not be 'true' macro, but they are good first attempts at close-ups. i have the canon equivalent of that lens and think it allows 1:2 at the longest end.
i like the third shot best from these three - the flare in the first is a bit distracting, and i'm not sure about the cluttered background in the second.
for first attempts i'd say these are pretty ok actually, but that's just my opinion as ever
