Bought these at an estate sale in Colorado, USA — six small hand-carved stone pieces (about 1×2 in), probably alabaster (piedra de Huamanga?). Four matching tablets with incised geometric designs filled with red pigment, one gridded piece with little projections, one dotted tablet. My research points to Andean illa/chacra amulets, maybe mid-20th century. Trying to confirm what they are and how old they might be. Any information welcome!