"Yes, it appears to be quite the Black family tradition," he said drily. "This one was my mother's, but the corresponding mirror is this monstrosity." He pulled out a gilded hand mirror, with decorative swirls and carvings around its edge and a large Black family crest embossed on the back. From the strain in his arm, Hermione assumed it was solid gold, and was grateful he'd given her the smaller one. She slid it into her pocket, wanting it close at hand, and thanked him. It would certainly be easier and more subtle than sending owls back and forth. 