GEM KNOWLEDGE · LABORATORY NOTES
Scapolite
A 7.88-carat faceted gemstone identified as marialite, a member of the scapolite group.
Sample: 10623 (number 2). Completed: August 8, 2024.
Finding: Marialite of the scapolite group, supported by elemental analysis, measured density, and refractive index.
Identifying the faceted stone
The measured density was 2.58 g/cm³, and the refractive index measured on the table facet was approximately 1.54. The report states that both agree with marialite.
This is a different tested specimen from the meionite-rich material in our Scapolite Meionite entry. These results describe the faceted marialite gemstone shown in this report.
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.
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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.
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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. (scapolite group)
Read the report as text
Analytical Result Report Sample id: 10623 (number 2) Submitted by: Soul Body Gems Date completed: 8-8-2024 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. 7.88 ct. Fig. 2: Backscattered electron image of an area of the specimen. Fig. 3: Energy dispersive spectrum of spot 1 in Fig. 2. (scapolite group) Summary of findings: This specimen (Fig. 1) is a beautiful cut stone. It is a marialite of the scapolite group (Figs. 2 and 3). The density was measured as 2.58 g/cm3 and the refractive index measured on the table is around 1.54, both are in agreement with marialite. Date: August 8, 2024. Signature.
