GEM KNOWLEDGE · LABORATORY NOTES
Pink Dolomite
A pink tower from India with a finely mixed mineral texture.
What the report found: Fine silty dolomite with roughly similar amounts of dolomite and silty quartz, plus minor clay minerals. The difference between light and dark pink areas is mainly associated with iron concentration.
The submitted tower measured approximately 84 mm. The laboratory noted a uniformly fine grain and proposed illite as a possible minor clay species. “Pink Dolomite” is the practical directory name for this specimen; the report describes a mixed dolomite–quartz rock rather than a pure dolomite crystal.
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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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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 spectral analysis of the light pink brown area in Fig. 1.
Read the report as text
Analytical Result Report Sample id: 9193 (pink tower from India) Submitted by: K.Bitner Date submitted: Sept. 9, 2020 Date completed: Sept. 16, 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: Photograph of the pink tower. Maximum dimension is 84 mm Fig. 2: Energy dispersive spectral analysis of the light pink brown area in Fig. 1. Table 1: compositional results for the light pink and darker pink areas element Light pink Dark pink Iron 1200 ppm 3700 ppm Titanium 2080 ppm 2000 ppm Manganese 220 ppm 272 ppm Potassium 650 ppm 600 ppm Summary of findings: This is a beautiful tower! Compositionally, it is fine silty dolomite with similar amounts of dolomite and silty quartz (Figs. 1 and 2, Table 1). Minor clay species are also present, likely some illite. The color in the light and dark pink areas is dominantly the result of iron concentration (Table 1). What strikes me is the uniformly fine grain of the specimen. Date: September 16 ,2020 Signature


