Here's everything to know about the relationships and dating lives of 'XO, Kitty' cast members, from Anna Cathcart to Choi Min-young.

Diamonds and other gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the same weight as a paperclip. (Don’t confuse carat with karat, as in “18K gold,” which refers to ...