Since 1961. Located in the Heart of Downtown Mcallen, M&R Jewelers has provided the finest diamonds, watches, and designer jewelry to the Rio Grande Valley. M&R Jewelry also offers full service watch and jewelry repair available along with custom work. M&R Jewelry sells diamonds, wedding bands, Kendra Scott, Montblanc, Pandora, Rado, Tissot, Mido, Bulova, and more.