Earring and Gem

Earring noun - Jewelry to ornament the ear; usually clipped to the earlobe or fastened through a hole in the lobe.

Gem and earring are semantically related. in precious stones topic. In some cases you can use "Gem" instead a noun "Earring".

Gem noun - A usually valuable stone cut and polished for ornament.

Earring and gem are semantically related. You can use "Earring" instead a noun "Gem".