A fine jewelry house in New York and Los Angeles.

Our work is only possible thanks to the talented expert engineers who passionately perfect each piece.

Rose is a GIA-certified designer who spent years studying and producing professional one of one pieces while shadowing major jewelers, before creating Costolo Studio.

Process, repurposing finite materials, and the elements we are humbled to create with inspire us. Never plated, outsourced, tarnished, or discarded.