duftite (w. mimetite)

TSNB416

Specimen

Exhibit 1. Duftite (w. mimetite); 78 mm.
Exhibit 1. Duftite (w. mimetite); 78 mm.
Image Credit: Malcolm Southwood
Exhibit 2. 32 mm field of view.
Exhibit 2. 32 mm field of view.
Image Credit: Malcolm Southwood
Exhibit 3. Analytical data; duftite. (M. Southwood and P. Carr; unpublished).
Exhibit 3. Analytical data; duftite. (M. Southwood and P. Carr; unpublished).
Image Credit: Malcolm Southwood
Exhibit 4. Analytical data. Duftite on this specimen (blue circles) is calcium rich.
Exhibit 4. Analytical data. Duftite on this specimen (blue circles) is calcium rich.
Image Credit: Malcolm Southwood
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Title

duftite (w. mimetite)

Principal Mineral

Duftite

Size

Cabinet; 78mm

Collection

Southwood, M. MS1997.115

Provenance

Carruth, N.

Entry Type

Specimen TSNB416

Description

A matrix of brecciated and altered dolostone, encrusted with goethite, followed by olive-green duftite (as aggregates of sub-mm framboids) and radial sprays of pale yellow acicular mimetite crystals (to circa 2.5 mm; Exhibit 2). WDS analysis of the duftite shows it to be Ca-rich (exhibits 3 and 4).

The specimen was purchased from English dealer Nick Carruth in 1997, but with no earlier provenance.

Associated Minerals

goethite; mimetite