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Garnet in Quartz

A Brazilian sphere containing almandine-dominant garnet associated with quartz and muscovite.

Sample: 1079 (#2, Brazilian sphere) · Completed: September 26, 2024.

Identified: Almandine-dominant garnet, muscovite, quartz, and a small monazite-group grain, likely monazite-(Ce).

Locality: Brazil, according to Soul Body Gems sourcing information.

Inside the sphere

The rounded reddish grains are garnet. Darker grains that were examined as possible tourmaline also proved to be garnet. The researcher considers a granitic pegmatite the likely source of this material.

View the original test results

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These results are the property of Soul Body Gems, Alexander Falster, and the Maine Mineral & Gem Museum. Any mention requires full acknowledgment.

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. (bluish part sticking up)

  • 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 spectrum of spot 1 in Fig. 2. (garnet group, almandine dominant)

  • 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 spectrum of spot 2 in Fig. 2 (muscovite)

  • 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. 5: Energy dispersive spectrum of spot 3 in Fig. 2 (quartz)

  • 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.6: Backscattered electron image of another area of the specimen. (paler colored portion)

  • 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. 7: Energy dispersive spectrum of spot 1 in Fig. 5. (monazite group species)

Read the report findings as text

Analytical Result Report. Sample 1079 (#2, Brazilian sphere), submitted by Soul Body Gems, completed September 26, 2024. An AMRAY 1830 SEM operated at 25 kV acceleration potential, 24 mm working distance, and 0 degrees sample tilt. The sample was coated with 250 Å carbon. The attached XRF unit operated at 30 kV.

  • Figure 1: Specimen photograph, approximately 45 mm maximum dimension.
  • Figure 2: Backscattered electron image of the bluish portion.
  • Figure 3: Energy-dispersive spectrum, almandine-dominant garnet.
  • Figure 4: Energy-dispersive spectrum, muscovite.
  • Figure 5: Energy-dispersive spectrum, quartz.
  • Figure 6: Backscattered electron image of the paler portion.
  • Figure 7: Energy-dispersive spectrum of a monazite-group species.

Summary: Rounded reddish grains are almandine-dominant garnet. Muscovite and quartz are associated. A small monazite-group grain, likely monazite-(Ce), was found. Dark grains investigated as possible tourmaline all turned out to be garnet. The material likely derives from a granitic pegmatite. The report ends with the September 26, 2024 date and signature.

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: 1079 (#2, Brazilian sphere)

Submitted by: Soul Body Gems

Date completed: 9-26-2024

Operating conditions: An AMRAY 1830 SEM operated at 25 kV acceleration potential, 24 mm working distance, 0 degrees sample tilt, coated with 250 Å carbon, and also using the attached XRF unit operated at 30 kV.

Fig. 1: Photograph of the specimen. Approximately 45mm maximum dimension.

Fig.2: Backscattered electron image of an area of the specimen. (bluish part sticking up)

Fig. 3: Energy dispersive spectrum of spot 1 in Fig. 2. (garnet group, almandine dominant)

Fig. 4: Energy dispersive spectrum of spot 2 in Fig. 2 (muscovite)

Fig. 5: Energy dispersive spectrum of spot 3 in Fig. 2 (quartz)

Fig.6: Backscattered electron image of another area of the specimen. (paler colored portion)

Fig. 7: Energy dispersive spectrum of spot 1 in Fig. 5. (monazite group species)

Summary of findings: This specimen (Fig. 1) is very pretty. The rounded reddish grains sre a garnet group species, almandine-dominant *Figs. 2 and 3). Muscovite and quartz are associated (figs. 2, 4 and 5). A small grain of a monazite group species, likely monazite-(Ce), was also found (Figs. 6 and 7). I was checking also he darker grains that have the same size as the garnets, thinking they might be a tourmaline group species but they all turned out to be garnet. This material is likely derived from a granitic pegmatite.

Date: 9-26-2024 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.