Opening a jewelry store in Harvard Square not only fulfilled Esmeralda Lambert’s dream of running her own business, but also created jobs for artisans from her home country of the Dominican Republic. Lambert’s store, “Esmeralda,” opened at 54 Church St. in Cambridge in October. Raised in a family of entrepreneurs, 32-year-old Lambert said she always knew she wanted to start a company. As a jewelry designer, Lambert didn’t want her store to only feature her own products, but rather showcase a variety of artists.