Blood and Gold

The true Time-Turner was slammed savagely into Hermione's throat. It shattered against her neck, bits of glass and gold piercing into her skin. The last thing she saw before blackness consumed her was a plume of metallic dust and vitreous fragments, tiny prisms dancing behind her eyelids.

(In which Hermione accidentally ends up in 1950, pitted against an ascending Dark Lord in his prime, caught in the entanglement of pureblood politics, dark magic, and Tom Riddle's interest)