It might be just because I'm a sucker for aquamarine but this beautiful - heavy at 1.65KG chunk feels really fantastic to me, it is so beautiful with mica scattered through the aquamarine rock (and it's natural (and a little muddy in places so don't expect any perfect edges).
It measures about 10cm long x 10cm wide x 8cm deep. Please double check the size and the photos before you buy.