DescriptionLARGE FLUORESCENT AGRELLITE
Kipawa Complex, Villedieu Township, Temiskaming Co, Quebec, Canada
Pink is a somewhat rare color in the fluorescent mineral kingdom, especially in large pieces such as this, showing it as the predominant shade, and is rarely displayed in such a vibrant, intense and unadulterated coloring. Agrellite from the Kipawa Complex, however, is the one fluorescent mineral that proves an exception to these rules, and the present specimen is exceptional even under these terms. From the few other places it has been found (elsewhere in northern Canada and Alaska), agrellite has been recovered in exceedingly small amounts, not particularly worthy of fluorescent displays. However, the Kipawa Complex is an alkaline syenite intrusion, similar to granitic rocks and their coarse pegmatite, but mostly lacking in the commonest silicate minerals such as quartz and feldspar group minerals. Such alkaline syenites usually contain rather bizarre combinations of minerals and in the case of the Kipawa Complex, this includes pods, "stringers", and lenses containing masses of brilliantly pink fluorescent agrellite. While most collectors can now have a "hand-specimen" of these shockingly pink fluorescent mineral, museum-sized masses of nearly pure agrellite such as this remarkable 13 x 8½ x 4 inch example is still extremely rare. This splendid piece was purchased directly from its collector, D. MacFarlane, for the Hugh Ronemus collection, and also contains minor amounts of the deep-red fluorescing albite as well as a greenish fluorescent and phosphorescent carbonate-mineral coating probably composed of aragonite and/or calcite, all fluorescing well together under shortwave ultraviolet rays, although the agrellite fluoresces slightly brighter under mid-range ultraviolet exposure.
Provenance: Ex D. MacFarlane, Hugh Ronemus Collections
Condition report available upon request.
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