Arhaus, a fixture on Rockville Pike since 2011, is leaving North Bethesda for a new home at Westfield Montgomery mall. The “globally inspired” furniture and home decor chain, with about 80 stores nationwide, sells goods from around the world with an emphasis on sustainability. Many of its pieces are made with recycled wood, metals and plastics; some are repurposed antiques. The new store will occupy 10,000 square feet on the lower level of the Nordstrom wing. Grand opening is set for March 31st.