Greenish yellow platy crystals that react strongly to Convoy longwave ultraviolet light. Width 9.25mm. Stack of 120 images (white light). Stack of 15 images (UV). Ex Margaret Brown Collection.
Greenish yellow platy crystals that react strongly to Convoy longwave ultraviolet light. Width 9.25mm. Stack of 120 images (white light). Stack of 15 images (UV). Ex Margaret Brown Collection.