Dims: 1.2 x 1.2 x 1.0" (3.0 x 3.0 x 2.5 cm)
Wt: 21.6 g
Madawaska Mine, Bancroft, Ontario, Canada
A single, slightly disjointed spray of Uranophane needles rests on the dull, dark brown host rock of this thumbnail specimen. The needles do not exceed 0.3" (8 mm) and are generally in very good condition, though there does seem to be some visible damage. They are rather fine and somewhat warped, so that their monoclinic form is not easy to determine, if even definable. They have the standard yellow coloration and a dull pearly-to-waxy luster, and are likely only dimly translucent at best. The brown host rock appears to contain some semicrystalline calcite and possibly some goethite. The specimen is affixed inside a large plastic specimen box with an adhesive putty.