A surviving earring gives the jeweller a reference for the shape, finish and fittings. Take it along when looking for a replacement for its partner.
Check which way the design faces
Photograph each side on a plain surface. If the design curves along the ear, an old picture of the pair can show whether the missing piece was a mirror image.
Check the proportions and fittings
Place the pieces next to each other. Compare the motif from end to end, then the colour, post position and back. For a dangling design, compare the drop from its attachment point. Bring the model code if you have it.
Confirm the offer
Ask whether a single earring is available and whether its fastening is included. If the jeweller offers to make one, discuss which features can be matched and what one finished piece will cost.
