Hi!
Good to hear that your taste for travel is getting it's due
Quick question...
You write:
"It was very interesting to see as in the following photograph the result from a random harvest: These pearls were produced by oysters grafted the same day by the same technician and they stayed for the same period in the water the same cage: [...] U Myint Lwin explained to us that [...] the difference in size seems to be mainly due to the host oyster"
Does this mean that the nuclei of these pearls are all the same size and the quantity of nacre deposed on them accounts for the (vast) difference of size between the pearls?