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GEM KNOWLEDGE · LABORATORY NOTES

Serpentine

A confirmed serpentine-rich specimen, presented separately from the previously tested Indian serpentine.

Finding: Sample 10619, completed July 16, 2024, is a serpentine-rich slab. Chromite and chromium-bearing magnetite are abundant; magnesite masses and very faint calcite-filled fractures also occur. The laboratory interprets it as the product of hydrous metamorphism of pre-existing ultramafic rock.

The report does not specify a geographic locality for this specimen. See the separate Serpentine (India) test for another confirmed material. Findings from one specimen should not be assigned to the other.

View the original report

Select a page to enlarge it. 4 pages; findings are summarized in accessible text above.

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 one of the broken beads.

  • 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 (Chromium-bearing magnetite)

  • 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 (chromite)

  • 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 4 in Fig. 2 (serpentine group)

  • 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. 6: Energy dispersive spectrum of spot 2 in Fig. 2 (magnesite)

  • 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. 7: X-ray maps of the area shown in Fig. 2. magnesium: calciuum: blue, , 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: 10619 (number 7)

Submitted by: Soul Body Gems

Date completed: 7-16-2024

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. 75 mm diameter.

Fig.2: Backscattered electron image of an area of one of the broken beads.

Fig. 3: Energy dispersive spectrum of spot 1 in Fig. 2 (Chromium-bearing magnetite)

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

Fig. 5: Energy dispersive spectrum of spot 4 in Fig. 2 (serpentine group)

Fig. 6: Energy dispersive spectrum of spot 2 in Fig. 2 (magnesite)

Fig. 7: X-ray maps of the area shown in Fig. 2. magnesium: calciuum: blue, , iron: green..

Summary of findings: This specimen (Fig. 1) is a Pretty slab of serpentine (Figs. 2 and 5). Abundant chromium-bearing magnetite and chromite (Figs. 2-4) are scattered throughout the specimen and magnesite masses (Figs. 2 and 6) are seen; this is typical for serpentine. Very faint fractures fills with calcite are seen in Fig. 7. The material is the result of hydrous metamorphism of pre-existing ultramafic rocks.

Date: July 16, 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.