“Cavansite and stilbite crystals, likely from the Wagholi quarries. Ex Willard Perkin (1907-1991) and thus a fairly early specimen from the cavansite finds in India. Child photos show the thumbnail box method that Mr. Perkin used to make each box like a small museum case. https://www.mindat.org/mesg-540035.html”

“This photo shows the thumbnail-box mount of Willard Perkin (1907-1991), the inventor of the "Perky box". Each specimen was carefully placed, often on a pedestal, so that the box itself was like a small museum case. ”

“This photo shows a typical mount by Willard Perkin (1907-1991) of a thumbnail specimen. In this case, a small plastic peg elevates the piece inside the box, and is inserted and glued into a small block of styrofoam which has been glued onto the back of the specimen. ”