Dims: 2.48x1.97x1.14" (6.3x5.0x2.9cm)
Wt: 6.55oz (185.5g)
Franklin, New Jersey, USA
This mottled brown chunk of rock from the mines in Franklin, NC, shows nothing of interest under normal light. Under short-wave ultraviolet, however, two minerals glow. Bright green reveals the presence of willemite (barely visible in the image), and a yellow-orange glow reveals the presence of clinohedrite (the color is slightly different and less intense than the orange that the local calcite can glow). Unfortunately, the orange glow of the clinohedrite, while easy to see with a human eye, is not picked up by my camera. The clinohedrite is only present on one face of the specimen.