An Incolay/Cameo Onyx box, it is manufactured from a composite of a resin and ground stone which are poured into a mold rather than carved. Measures approximately 2" high and 3" across.
Images courtesy of Brian Sibley. Used with permission.
Snow White collector Elana Sperber has a blue version of this heart box. It was purchased at California's Disneyland, and she believes that it also dates from the 1980s...
Blue Box images courtesy of the Elana Sperber collection. Used with permission.