The instrument in this picture is a 10x loupe (pronounced loop). They are used in the jewelry industry examine diamonds, for example. This loupey heart photo sent to me by my friend Denise, a fellow diamond lover. I use mine to help me examine my prongs, make sure my ring is clean and for occasions when someone shows me a family heirloom or takes me with them to look at engagement rings for a fiancé-to-be. Yeah, it’s a little obsessive to own one.