"And that's my oldest sister Limestone, who's off at college now and wants to run her own mining company some day," Pinkie said as she pointed to one picture. "This one's my Mom and Dad - they're off visiting our cousins in Rockville this week, and they took my little twin sister Marble with them, 'cause she likes the quiet out there. And that's me and Maud, my second-oldest-sister who's getting her degree in rock science! She's so lucky her college is close enough to home that she can just drive there from here every day..."