I have been weighing both our chicken eggs and quail eggs before incubation for the past few weeks.
Our barred rock and rhode island hens eggs vary from 55-65 grams, weighed about 30 of them.
The last ~20 Coturnix Quail eggs are averaging around 10.5 grams, my biggest quail hen is ~250 grams, she is white and we suspect A&M.
we also have what I was told is an Italian trio, now I am thinking politiquail correct term is manchurian? they are younger and smaller in size, but laying exact same size eggs as the white gals.
my simple observations, very new to Quail.