dioptase

TSNB674
Specimen
Loomis, L. & E.Zweibel, J.
Exhibit 1. Dioptase; 55 mm.
Exhibit 1. Dioptase; 55 mm.
Image Credit: Malcolm Southwood

Specimen Title

dioptase

Associated Minerals

calcite

Principal Mineral

Dioptase

Size

Cabinet; 55mm

Location in the Mine

Second oxidation zone

Provenance

Zweibel, J.; Loomis, L. & E.

Collection

MGMH; 2024.5.504

Entry Number

Specimen; TSNB674

Description

Lustrous, translucent, dioptase crystals (to 6 mm) on coarsely crystallised white calcite rhombs (to 7 mm).


The specimen is from the collection of Lynn and Elaine Loomis which was acquired by Harvard in 2024. It is accompanied by a Mineral Kingdom of Woodmere label (Julius and Miriam Zweibel) which dates it to pre-1980. While the location in the mine is not recorded, the paragenesis and habit are definitive for the second oxidation zone.