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Yttrium-bearing Fluorite

A pale green fluorite from the Brazil–Argentina border mine.

What the report found: Fluorite with about 1,100 ppm yttrium, the most abundant measured trace element in this specimen.

The laboratory described this specimen as clean and relatively homogeneous in trace-element composition. It noted a narrow band with more fluid inclusions, possibly reflecting changing growth conditions. Ytterbium was detected near the quantification limit; iron and manganese were below detection.

“Yttrium-bearing” describes a measured trace element within fluorite. It does not make this a separate species called “yttrium fluorite.” The mine location comes from our sourcing information, not the chemistry. The lavender and white sample is a different tested specimen with lower measured yttrium.

View the original report

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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.

  • 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. 1: Backscattered electron image (pale green fluorite)

  • 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. 2: Energy dispersive spectrum of spot 1 in Fig. 1. (fluorite).

Read the report as text
                                                   Analytical Result Report

Sample id: 9057 (green fluorite)
Submitted by: K.Bitner
Date submitted: June 22, 2020
Date completed: June 27, 2020
Operating conditions: JEOL JSM-6400 operated at 25 kV acceleration potential, 15 mm working distance, 15 degrees
sample tilt, coated with 250 Å carbon. Using the X-ray fluorescence attachment with 35kv potental in conjunction with
the EDS system.




Fig. 1: Backscattered electron image (pale green fluorite)




                                                                               )

Fig. 2: Energy dispersive spectrum of spot 1 in Fig. 1. (fluorite).
Fig. 3: Zoomed-in view of Fig. 2 showing yttrium peaks



Summary of findings: This is a nice clean fluorite specimen. It appears to be very homogenous with respect to trace
elements. The most abundant one is yttrium (1100 ppm) (Figs 1 and 2), minor amounts of titanium (300 ppm). There is
a band of slightly higher density of fluid inclusions noticeable which is a few mm thick cutting through the specimen.
This likely a growth phenomenon possible related to changes in conditions of formation such as a slight drop in pressure.
Ytterbium was detectable but ranged close to the limit of quantification. Iron and manganese were below detection
limit.




Date: June 27 ,2020                       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.