Authorities say 28-year-old Shannon Cheripka, of Glasgow, and 26-year-old Angela Crook, of Coalport, attempted to rob the Adult World store in Duncansville around 1 a.m. Thursday.
Cheripka told police the clerk said, "First, if you're going to rob someone, get a real gun. Second off, you're not getting any money."
Authorities say the clerk chased away the women before police in nearby Logan Township arrested them in a van the clerk had described.
The women remained in the Blair County Jail on Friday on robbery and other charges. It was unclear if they had lawyers.