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Chrysocolla in Quartz

Chrysocolla in a quartz-rich Peruvian breccia.

What the report found: Quartz-rich breccia, blue and green chrysocolla, and minor malachite.

This approximately 47 mm sphere was reported from Peru. The laboratory describes a quartz-rich breccia with copper mineralization: blue and green chrysocolla occurs in small cavities, with minor malachite. The report suggests malachite formed earlier than the chrysocolla; possible partial replacement is presented as an interpretation, not a confirmed sequence for every area.

“Quantum Quattro” is a market label applied to mixed copper-bearing stones, but it is not an identification established by this test. This specimen has its own composition and is distinct from the other Peruvian chrysocolla entries in our directory. Its tested components should be described directly rather than treated as a single named mineral.

Find this same specimen under: Chrysocolla in Quartz · Quantum Quattro (Peru)

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                                                 Analytical Result Report

Sample id: 9251 (Peruvian chrysocolla sphere)
Submitted by: K. Bitner
Date submitted: Jan. 15, 2021.
Date completed: Jan. 26, 2021.
Operating conditions: JEOL JSM-6400 operated at 25 kV acceleration potential, 15 mm working distance, 15 degrees
sample tilt, coated with 250 Å carbon. Using the X-ray fluorescence attachment with 35kv potental in conjunction with
the EDS system.




Fig. 1: Photograph of the specimen, approximately 47 mm diameter




Fig. 2: Close-ups of the specimen. Left: area with several small cavities. Field of view: 5 mm.
Middle: view of a chrysocolla-lined small cavity. Field of view 1.5 mm.
Right: chrysocolla with a little malachite. Field of view: 1.5 mm.
Table 1: Compositions of the specimen (In weight percent)

 element
 Silicon dioxide            37.52
 Aluminum oxide             1.94
 Calcium oxide              0.25
 Magnesium oxide            0.88
 Iron oxide                 0.71
 Copper oxide               35.7
 Zink oxide                 1.21
 Manganese oxide            0.77


Summary of findings: The specimen is a sphere made from a quartz-rich breccia with copper mineralization (Fig. 1).
Some open voids remain (Fig. 2 left) and are filled with rounded masses of blue chrysocolla (Fig. 2 middle). Minor
malachite has been noted coated with blue chrysocolla (Fig. 2 right). Chemically. Copper and silicon oxide are dominant,
but a number of elements are evidently substituting for copper or are inclusions of oxides or other species: zinc,
magnesium, calcium, iron, manganese and aluminum. Some of the chrysocolla is blue, some is green, this is not unusual
for chrysocolla. The earlier copper mineral manifestation here was malachite which was followed by chrysocolla. It is
possible also that the green chrysocolla has partially replaced malachite and some is still present.




Date: January 26, 2021                       Signature

Report acknowledgment: These analytical results and report materials are the property of Soul Body Gems, Alexander Falster, and the Maine Mineral & Gem Museum. Any use or mention of these results requires full acknowledgment of all three.

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Results shown here apply to the specimens identified in the reports. A trade name or visual resemblance alone does not establish the composition of another piece.