Guava Quartz (Brazil) Meaning, Metaphysical Energy & Geology

A raw specimen of the Brazilian material sold as Guava Quartz was tested before the material was made into the polished form shown in its photograph.

Finding: Sample 92914 (#15), completed August 27, 2022, is quartz-rich material with lesser aluminum, potassium, sodium, calcium and iron. The laboratory observed domains where earlier minerals had been largely replaced and suggested a highly silicified volcanic rock.

“Guava Quartz” is a market name, not a separate mineral species. The report examines the raw material. Its conclusions describe that specimen and should not be read as individual testing of every polished piece. Brazil is the source supplied for this material; the laboratory report itself does not establish geographic origin.

View the original report

Select a page to enlarge it. 3 pages; findings are summarized in accessible text above.

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Report images © Soul Body Gems, Alexander Falster and the Maine Mineral & Gem Museum. Please acknowledge all three when referring to these results. Findings apply to the specimen examined.

Understanding the report figures

Use this guide alongside the written findings and the original report transcript. It explains the purpose of each analytical figure and preserves the laboratory’s own figure labels. The interpretations apply to the tested specimen; signals alone do not establish the identity of every similar-looking stone.

Electron microscope image: This view shows small-scale regions selected for analysis. Its brightness contrast helps distinguish regions with different compositions; it is not a photograph of their natural colors. Numbered spots connect this view to the analyses listed in the report.
Laboratory figure caption: Fig. 2: Backscattered electron image of an area of the specimen shown in Fig.1.
Elemental spectrum: The peaks record characteristic X-ray signals from elements in the analyzed spot or area. This is an analysis of that location, not automatically of the entire specimen. Any mineral identification or uncertainty named in the laboratory caption is retained below.
Laboratory figure caption: Fig. 3: Energy dispersive spectral analysis of spot 1 in Fig. 2 (likely highly silicified volcanic rock)
Elemental spectrum: The peaks record characteristic X-ray signals from elements in the analyzed spot or area. This is an analysis of that location, not automatically of the entire specimen. Any mineral identification or uncertainty named in the laboratory caption is retained below.
Laboratory figure caption: Fig. 4: Energy dispersive spectral analysis of spot 2 in Fig. 2 (likely highly silicified volcanic rock)
Element map: This map shows where the named elements occur within the analyzed area. Its colors represent the laboratory’s selected element channels, rather than the specimen’s visible colors. The caption below preserves any color key or distribution noted by the laboratory.
Laboratory figure caption: Fig. 5: X-Ray map of the area shown in Fig. 2. Aluminum: yellow, silicon: red, iron: green.

Read the original laboratory report as text

The following text and tables are transcribed from the original laboratory document. Figure captions identify the report images; the laboratory interpretations and limitations are preserved.

Laboratory report 1

Analytical Result Report

Sample id: 92914 (#15)

Submitted by: K. Bitner

Date submitted: July 14, 2022.

Date completed: August 26, 2022.

Operating conditions: An AMRAY 1830 SEM operated at 25 kV acceleration potential, 26 mm working distance, 15 degrees sample tilt, coated with 250 Å carbon. Using the X-ray fluorescence attachment with 35 kV potential in conjunction with the EDS system. A Bruker D2 Phaser X-ray diffractometer was used and operated at 30 kV and 10 mA.

Fig. 1: Photograph of the specimen. Approximately 10 cm maximum.

Fig. 2: Backscattered electron image of an area of the specimen shown in Fig.1.

Fig. 3: Energy dispersive spectral analysis of spot 1 in Fig. 2 (likely highly silicified volcanic rock)

Fig. 4: Energy dispersive spectral analysis of spot 2 in Fig. 2 (likely highly silicified volcanic rock)

Fig. 5: X-Ray map of the area shown in Fig. 2. Aluminum: yellow, silicon: red, iron: green.

Table 1: Minor and trace element composition of the specimen. (in wt. %).

Laboratory data as recorded in the report
Element	Reported value
Aluminum	2.9
Calcium	1.2
Iron	0.9
Magnesium	0.3
Potassium	0.8
Sodium	0.8
Titanium	0.1

Summary of findings: This specimen is interesting (Fig. 1). It reminded me of the novaculite from Arkansas, but it differs chemically. The bulk composition is quartz with lesser amounts of aluminum, potassium, sodium, calcium and iron (Figs. 2-4 and Table 1). Therea re still domains present where individual minerals were located and have now been largely replaced but the indications still prevail (Fig. 5).

Date: Aug. 27, 2022 Signature