The card shows a close view of pale gypsum formations in Great Onyx Cave, their curling, feathery shapes standing out against a dark background. The clustered forms at lower left look like white blossoms or a wreath, the natural effect that gives the formation its name. Great Onyx Cave is one of the show caves in the Mammoth Cave region of Kentucky, an area long promoted for its underground scenery. The image presents the cave as a tourist attraction, with the delicate crystal growths as the main draw.
Pronounced fine horizontal line texture across the whole image, consistent with linen-era stock or a halftone screen. Printed caption "GYPSUM FEATHERS, GREAT ONYX CAVE, KY."; proprietor credit line "MRS. W. P. COX, MGR., GREAT ONYX CAVE HOTEL, MAMMOTH CAVE, KY."; publisher imprint "GENUINE CURTEICH-CHICAGO 'C.T. ART-COLORTONE' POST CARD (REG. U.S. PAT. OFF.)"; "POST CARD" heading with "PLACE ONE CENT STAMP HERE" and number 1B-H2654. No postmark, stamp, address, or handwritten message on this scan. Divided-back C.T. Art Colortone (Curt Teich) card. Linen-textured stock.
Cite this card
Gypsum Feathers, Great Onyx Cave, KY, circa 1941, postcard, c. 1941. PostalPast Collection. https://postalpast.com/postcard/gypsum-feathers-great-onyx-cave-ky-circa-1941. Accessed November 2, 2026.
