Diamond's was a department store chain headquartered in Phoenix, Arizona that operated from 1897-1984. Originally named The Boston Store,^[1] it was founded by brothers Nathan and Isaac Diamond

The Boston Store was founded in 1897 by brothers Nathan and Isaac Diamond, Jewish immigrants who had in 1891 begun a dry-goods mercantile in El Paso called The New York Store. Hearing of great potential in Arizona the brothers moved to Phoenix.^[1] They set up a store on Washington Street in Downtown Phoenix. by 1941 the Diamond brothers had enlisted the help of family to run the store. Nathan's sons Harold and Bert and Isaac's son Herbert were all involved with management of the store.^[2] The Boston Store was renamed Diamond's in 1947 in honor of the store's 50th anniversary. Harold and Ralph Diamond eventually took over ownership. Roberts Brothers of Portland, Oregon purchased Diamond's in 1957.^[3] That same year the store opened its first branch location at Park Central Mall, the building on Washington Street was subsequently closed.^[4] In 1962 the firm considered expanding into the Tucson market but would hold off on doing so until 1974.^[5] In 1968 Diamond's was sold to Dayton Corporation of Minneapolis.^[6] In 1970 Diamond's acquired Las Vegas based Ronzone's and converted its store at The Boulevard Mall to a Diamond's.^[7] On January 14, 1984 Diamond's consolidated its operations in Mesa by closing its Tri-City Mall location due to its close proximity to the newer Fiesta Mall location.^[8] Diamond's had expanded to twelve stores throughout the Southwest when in September 1984 then owner, Dayton-Hudson Corporation, sold the chain to Dillard's.^[5][9]

The locations of the former Diamond's department stores.^[10] The Original Flagship Store on Washington Street operated from 1897-1957.