KOLWEZITE
Specimen kol-2

Dims: 2.3" x 2.2" x 1.9" (5.8 x 5.6 x 4.8 cm)

Wt: 5.26 oz. (149.1 g)

Kisenge Mine, Zaire

A small crust and several loose clusters of Kolwezite rest on the host rock of this African specimen. The clusters are made up of sprays of acicular, needlelike crystals that are in generally good condition and do not exceed 3 mm in length. Some of these clusters also seem to have banded together to form 2 flat platelets that extend upwards from the sphaerocobaltite bed on which they rest. These platelets have a suspiciously hexagonal-looking shape. All of the formations that the Kolwezite takes seem to be green-colored but have a dirty pale-brown coloration that covers them. The sphaerocobaltite bed consists of dozens of small, pale pink scalenohedral crystals that are mostly covered, but show a bright, vitreous luster, transparence, and excellent clarity. They are quite small, though, not exceeding 4 mm in length. This bed rests on a base rock that appears to be a mixture of calcite, quartz, more sphaerocobaltite, and some decayed chrysocolla.

Dims:2.6x2.3x1.1" (6.6x5.8x2.8 cm)

Wt: 4.6oz. (131g)

Mashamba West Mine, Shaba prov., Zaire

A limestone matrix covered on one surface with cobaltian calcite forms the host for several nodules of kolwezite on this specimen. Several of the kolwezite nodules are damaged, exposing a dark greenish-black interior. Were it not for this, they might easily be mistaken for malachite. The back of this specimen has been sawed,revealing small vugs of cobaltian calcite. Nothing can be seen of kolwezite's monoclinic form on this specimen, but this is not really surprising. These rounded nodules are the norm for this species.