GEM KNOWLEDGE · LABORATORY NOTES
Gem Lepidolite with Tourmaline
Pink elbaite tourmaline with lepidolite, confirmed by testing.
Sample 1244 · May 10, 2025
What the testing found
Testing identified pink tourmaline of the elbaite species together with lepidolite. The very low potassium-to-rubidium ratio of 6 indicates an exceptionally evolved granitic pegmatite. This report shares sample number 1244 with the separate vanadinite report, but describes a different specimen.
View the original test results
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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 in Fig. 1.
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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. (elbaite tourmaline)
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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. 4: Energy dispersive spectrum of spot 3 in Fig. 2. (lepidolite)
Read the complete report as text
Analytical Result Report
Sample id: 1244 (#3 pink tourmaline and lepidolite)
Submitted by: Soul Body Gems
Date completed: 5-10-2025
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 specimens. 6 cm maximum dimension.
Fig.2: Backscattered electron image of an area of the specimen in Fig. 1.
Fig. 3: Energy dispersive spectrum of spot 1 in Fig. 2. (elbaite tourmaline)
Fig. 4: Energy dispersive spectrum of spot 3 in Fig. 2. (lepidolite)
Summary:
This specimen (Fig. 1) is indeed pink tourmaline (elbaite) (Figs. 2 and 3) and lepidolite (Figs. 4 and 4). This material comes from a very evolved granitic pegmatite, this is indicated by the very low K/Rb ratio of 6.
Date: 5-10-2025 Signature