Dims: 3.7" x 3.4" x 2.5" (9.4 x 8.6 x 6.4 cm)
Wt: 1 lb., 1.1 oz. (486.0 g)
San Valentin, La Union, Murcia, Spain
This large hand specimen consists of several patches of colorful reniform Goethite crusts that line hollows in what appears to be an amorphous quartz host rock. These crusts contain beautiful globular formations and some rather odd crystalline shapes and forms that were either pseudomorphed into Goethite after another mineral, or were enveloped by it. Its coloration is intense and widely varied, spanning the visible spectrum. Most of the material has a bright, almost metallic luster, but a few areas show a positively dull, matte luster that appears to be caused by a coating of some other mineral. Among the Goethite crusts are several patches of brick-red limonite that were trapped under them. The host rock shows some crystalline tendencies, but is basically amorphous. It is slightly rust-stained, and so has a pale and dingy orange-yellow color.