Here comes the science part. A cherry is a drupe or stone fruit (e.g. coffee, jujube, mango, olive) of the genus prunus (i.e. almond, apricot, damson, nectarine, peach and plum).

Photo of a cherry stone (close up)

Anatomy of a cherry

Drupes consist of an outer part (skin and flesh) that surrounds a shell (the pit, stone or pyrene) of hardened endocarp that contains a seed.

Put simply, cherry stones are a bit of hard wood with a bubble of air at its core that allows thermal storage and reduces heat flow. Nature’s thermal gift to us.

anatomy of a cherry