The results indicate that oxidized copper minerals--corresponding to malachite, chrysocolla
and brochantite--were primarily used in the furnaces.
From these preliminary data, as well as the radiating fibrous texture and deep blue colour seen in our samples, it appears that bisbeeite indeed differs from chrysocolla
and needs to be better defined.
Economic ore types in both deposits can be classified into four major groups: primary sulphides (chalcopyrite and bornite); secondary sulphides (chalcocite, chalcopyrite, bornite, and covellite); oxides (chrysocolla
, brochantite); and a mixture of oxide and sulphide.
Native copper, chrysocolla
and azurite, although less abundant, also occur.
Among the minerals used for making jewelry were chrysocolla
The mineralogy of the milled Haib feed revealed over 98.5% Chalcopyrite, 1% Bornite, and less than 0.5% of Chalcocite, Covellite, Malachite and Chrysocolla
On initial observation, it appeared to be composed of azurite and chrysocolla
because of its patchy blue coloration and the presence of some green areas (Figure 11, left).
Several secondary copper minerals like malachite, chrysocolla
and turquoise were also common.
Completely Oxidised (top 25-35 metres) - to an iron oxide-quartz fragment gossan/ironstone with local malachite - atacamite - chrysocolla
- cuprite mineralisation.
Later carbonate and silica-enriched hydrothermal fluids gave rise to the malachite and chrysocolla
and were also responsible for the limonitisation.
The IM-001828 rock sample contained visible malachite, chrysocolla