GEM KNOWLEDGE · LABORATORY NOTES
Axinite (Pakistan)
An axinite-group specimen with magnesium slightly dominant over iron, described as mainly axinite-(Mg). Refractive indices measured between 1.67 and 1.70.
Tested specimen: 10624 (#11 axinite) · Report completed: September 10, 2024
Supplied locality: Pakistan. Locality is supplied background, not independently established by the analysis.
What the report shows
The printed sample number also appears on other distinct reports. This entry preserves the original report and identifies it by specimen description and date.
View the original report
Select any report page to enlarge it. A text transcript is available below.
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.
-
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 (axinite)
Read the report transcript
Analytical Result Report
Sample id: 10624 (#11 axinite)
Submitted by: Soul Body Gems
Date completed: 9-10-2024
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 35 mm maximum dimension.
Fig.2: Backscattered electron image of an area of the specimen.
Fig. 3: Energy dispersive spectrum of spot 1 in Fig. 2 (axinite)
Fig. 4: Petrographic photomicrographs in plane polarized light (left) and under crossed Nichols (right). The refractive indices are all high, 1.67 to 1.70.
Summary of findings: This specimen (Fig. 1) is a member of the axinite group (Figs. 2 and 3). It is just magnesium dominant over iron; thus it is mainly axinite-(Mg). The refractive indices are all high, 1.67 to 1.70 and birefringence is low (Fig. 4). This specimen has some respectable and fairly large crystals!
Date: 9-10-2024 Signature