Charting the designer’s rise from combing rocky driveways to making jewelry and home decor coveted by the celeb setAll fashion talks about now—or seems to talk about—is social media: where it’s going, who’s doing it, and how. Not on board? Good luck with that. So it’s not surprising that jewelry designer Kimberly McDonald has active Facebook and Twitter accounts (@KMD_Jewelry), the latter of which is a savvy mix of the professional (press updates, bauble shots) and personal (Gummy Bears! Minnesota Vikings!).But if you thought this was all part of a grand scheme—a pointed business strategy—to reach a larger demographic and push a branding message with McDonald front and center, think again. She’ll readily admit that she’s not much of a planner. Things just happen. One thing leads to another. And as the Asheville, N.C., native traces her career—from boutique owner to