Olivenite (w. malachite and rosasite)

TSNB846
Specimen
Feinglos, M.N.King, V.T.Segeler, C.G.
Exhibit 1. Olivenite (w. malachite and rosasite); 70 mm.
Exhibit 1. Olivenite (w. malachite and rosasite); 70 mm.
Image Credit: Malcolm Southwood
Exhibit 2. 38 mm field of view.
Exhibit 2. 38 mm field of view.
Image Credit: Malcolm Southwood
Exhibit 3. Specimen label (anonymous).
Exhibit 3. Specimen label (anonymous).
Image Credit: MGMH archive
Exhibit 4. Specimen data card (Feinglos).
Exhibit 4. Specimen data card (Feinglos).
Image Credit: MGMH archive
Thumbnail by 1Thumbnail by 2Thumbnail by 3Thumbnail by 4

Specimen Title

Olivenite (w. malachite and rosasite)

Associated Minerals

bayldonite (?); malachite; rosasite

Principal Mineral

Olivenite

Size

Cabinet; 70mm

Location in the Mine

Undetermined

Provenance

Segeler, C.G.; King, V.T.; Feinglos, M.N.

Collection

MGMH; 2022.4.5555L

Entry Number

Specimen; TSNB846

Description

This specimen consists largely of massive olivenite intergrown with relict and partly oxidised sulphide ore. Shallow vugs on the display face (exhibits 1 and 2) host prismatic crystals (to 3 mm) of greenish-black olivenite and extensive overgrowths of mamillated to botryoidal malachite and rosasite. The presence of bayldonite (?) is noted on earlier labels (exhibits 3 and 4; see below) but has not been verified.


Mark Feinglos purchased the specimen from Van King in September 1992, prior to which it was in the collection of Curt Segeler. An older but anonymous label (in French; Exhibit 3) describes the specimen as olivenite with bayldonite; bayldonite is also noted on the Feinglos datacard (Exhibit 4). 

The location in the mine is not recorded.