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.
Pancreatic Acinar Cell Cancer. Acinar cell neoplasms arise from the acinar cells of the pancreas. Normal acinar cells are the primary cells of the exocrine pancreas and are responsible for secreting various enzymes. These tumors are distinct from the more common adenocarcinomas of the pancreatic ducts.