The author was referring to the steam holiday gems. They are a new feature (released yesterday) in which a steam user can turn their extra junk cards/backgrounds/emotes into gems.. These gems can be used to buy more cards; or, during the upcoming holiday event only, to bid on games.
Acinar cells. 1  Acinar cells are the exocrine (exo=outward) cells of the pancreas that produce and transport enzymes that are passed into the duodenum where they assist in the digestion of food.
It is made up of three layers of cells: the supporting cells, the olfactory receptor cells, and the basal cells. Supporting cells are similar to glial cells and help produce mucus. Basal cells are the source of new receptors.