When it’s time to say “Happy birthday” or — most importantly — “I was a big jerk and I’m so, so sorry,” sit down with Peter and Mark (respectively) at their relaxed upstairs jewelry salon in Haverford Square. This is no standard retail space; it’s like shopping in your friend’s living room (with proffered beverages and all). And if you don’t see something you like amid their stunning inventory, they’ll find it or have it made. (That includes creating a mate for that one lost earring.) There’s also a beautifully curated array of gifts for home, men, women and children.