Vintage resin windowpane lucite Trivet

Such a darling little keepsake! Seems to encase lentils, rice/grains within resin. Even though I recently scrubbed the front and back with Dawn soap, please note that there is a bit of a film/residue on the back that I did my best to photograph. Some wear on the metal wall hanger Tags- nature lover napkin 1970s style 60s aesthic MCM pressed dried VTG rice Wooden wood keepsake see through thru outdoorsy hippie boho bohemian tan pale pink growth hippie potholder decor decoration 6.5 oz on own