Deal of the Day This is the one thing on sale (out of many things on sale we write about) you should buy today. Read more here . Photo-Illustration: The Strategist; Photo: Retailer Building a fine-jewelry collection is an investment and can take years. Especially since most fine-jewelry brands hold a single sale or two per year. Catbird , well loved for its dainty gold pieces, is currently running its only sale of the year, and it is chock-full of under-$50 finds. I’m particularly fond of these