When the vesicles are filled up with some mineral, the rock is said to be amygdaloidal, from the almond shape assumed by the kernels filling the cavities.
"Geology"
James Geikie
Putting the rice in will stop the boiling, so when it boils up again you give it just one stir to keep the kernels from sticking to the bottom of the saucepan.
"Ethel Morton at Chautauqua"
Mabell S. C. Smith
Although Landolin, who was sitting on the bench before the house, saw the lady coming, he did not move, but kept on cracking nuts in his hand, and shelling out the kernels.
"Landolin"
Berthold Auerbach