Sorensenite Crystal - Greenland
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A nice sized pure sorensenite crystal exhibiting a beautiful pink color.
Sorensenite crystals are found in a ridiculously hard analcime matrix and - when you can find them - are usually found as a nodule, flat in the middle of a giant boulder, with no options to extract them. Power tools are required to drill, blast and saw to obtain matrix pieces of any size. Sorensenite is fluorescent a creamy white SW and forms as blades in an analcime matrix. The green fluorescence is uranyl activated fluorescence in the analcime/lujavrite matrix. The matrix is mostly analcime, with pockets of crystals scattered throughout.
Sorensenite is a beryllium tin silicate, extremely rare - found only in the Ilimaussaq Complex, Greenland - nowhere else in the world - a rarity in itself. Specimens are found in a couple of places within the complex but one area (Steenstrupe Field at the bottom of Kvanefjeld Mt. - a field of house-sized boulders) produces the best pieces such as this.
Willemite, Calcite, Fluorite from the Garpenberg Mine in Sweden
The Garpenberg mine is located in Bergslagen, a very old mining area in the southern part of Sweden.
The mine is very active today and is one of Europe's most progressive underground mining operations. Collecting is not possible, and the few specimens that reach collector's hands are highly prized. The mineralogy is quite similar to that of Franklin NJ.