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Mineral Specimens with Fluorite
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1.9 x 1.7 x 1.7 cm. Here is one of the famous "water-clear" fluorites from Dalnegorsk, with the distinction of having beautiful bevels along the edges. You can see the bit of quartz in back right through the crystal.
5.6 x 4.8 x 3.2 cm. This is a cluster of fluorite crystals from the now-closed Elmwood Mine that is UNUSUALLY transparent. In fact, they (also unusually) show marked zoning, with darker purple towards the outside. They have the shiny "pebbly" surface you sometimes see on fluorites from here. There is just a bit of accenting sphalerite. The crystals measure to 2.5 cm along the edge.
7.4 x 6.8 x 4.8 cm. Though most of these crystals are frosted, there is this exquisite twin at the peak of the specimen that you can see fluorescing dramatically even in normal halogen photo (or case) light, with wonderful clarity and luster. This twin measures 2 cm on edge. The rest of the crystals are admittedly less impressive.
11.9 x 10.2 x 6.7 cm. This is an OLD English specimen of a classic association from the Derbyshire mining district - golden-brown, microcrystalline bladed siderite with fluorite. There is a WHOPPER crystal of fluorite here that gives the specimen a lot of structure and character, rather than being just a blob: it measures 5 cm across the edge (!), and is free of siderite at one end - this side of the other crystals is exposed as well. Tiny gem-like crystals of quartz have grown on the exposed surfaces of the fluorites.
5.9 x 4.1 x 2.4 cm. A classic association from the Elmwood - lustrous compound crystals of sphalerite with sparkly dolomite, and representing fluorite, a tiny "cutie" of a crystal, gemmy, complete and perfect.
9.7 x 8.6 x 6.4 cm. A showy and excellent pseudomorph from recent finds at the famous Xianghualing Mine of China. Snow-white, sparkly quartz after calcite scalenohedrons are richly encrusted on glassy, translucent, sea-green fluorite. A few broken pseudos show that the crystals are hollow! This is indeed, a neat revelation, highlighting the pseudomorphing process of the calcite crystals by the quartz.
10.3 x 6.9 x 4.4 cm. These beautiful specimens are rare survivors of a small find that produced GREAT carving rough for cabochons and jewelry made of chalcedony (its gemmy and transparent/translucent!), to the detriment of the original specimens from our point of view! This is rare and beautiful old material from the 1980s. This one is particularly nice because it shows the lace agate in layers below the chalcedony that provided the silica for replacement of the fluorite crystals that were originally inside this vug. In other words, this piece preserves the full geological context of the pocket, with crystals in a vug in the ground, changing over time to another mineral due to alterations in the chemistry and environment. Besides, it’s beautiful, too! Ex. Charlie Key.
1.8 x 1.7 x 1.1 cm. This is a classic Auglaize Fluorite specimen showing 1.2 cm colorless cube with well-centered, distinct, rich purple color "phantom" inside. The crystal is in great condition with very sharp faces and excellent gemminess. It is sitting upon a small amount of Dolostone matrix, making for a very aesthetic thumbnail display specimen. Ex. Richard Kosnar Collection.
5.8 x 4 x 3.5 cm. Fluorite crystals to 1.4 cm in size surmount a cluster of smoky quartz, one doubly-terminated, in this supremely good small cab from the famous 1991 find at Point Kurtz. Eric Asselborn purchased the lot, and this piece was sold soon after to Gene Meieran with whom it remained for some time. It "glows" with color, when well lit. The smokies under the fluorite are also quite gemmy. This pocket has remained the pinnacle of Alpine fluorite collecting for 16 years now. Ex. Dr. Eugene Meieran, Eric Asselborn Collections.
17.7 x 15.6 x 6.2 cm. This piece features translucent bright forest-green octahedra to almost 2 inches, perched on contrasting matrix of CRYSTALLIZED quartz. This important fluorite specimen is from the older locality to the NE of Dalnegorsk, and represents the best of the classic green fluorite on white quartz assemblage from this location. It is an older specimen that was, I am told, in the well-known Vladimir Pelepenko Collection before it sold to a private American collector.
10.4 x 9.0 x 3.5 cm. Sadly, the pink fluorites from Mexico are no more. For awhile, you could get a really nice fluorite of a color that was only available for a fortune from Switzerland or Peru, in these big, rich plates. This plate is of the TOP quality for transparency and color, with crystals to 1.8 cm. The ones of this quality were very uncommon even when these were coming out in good numbers.
15.4 x 12.3 x 7.3 cm. A BIG cluster of dozens of transparent, light purple crystals of fluorite with beautiful purple edges, densely massed around the matrix. The crystals have beautiful stepped forms, and a pretty silky luster to them.
10.8 x 6.6 x 5.6 cm. A sharp, gemmy and lustrous, 4.9 cm, golden-orange scheelite crystal set on a bit of matrix and very nicely complimented by a large, 5.6 cm, translucent, pastel blue-green fluorite cube and heavily dusted with pearlescent muscovite blades. A very showy and DRAMATIC CABINET combination specimen from recent finds at the famous Mt. Xuebaoding of China.
6.4 x 4.7 x 4.0 cm. Glassy, sea-green fluorite cubes from Dal’negorsk are some of the best fluorites in the world and have certainly helped put Dal’negorsk on the mineral collector’s map. They are highly desirable and much sought-after in fine specimens. This aesthetic specimen features a 3.7 cm wide cluster of water-clear cubes beautifully perched on a spike of matrix with smaller crystals attendant at the base. Very nearly pristine, the few, tiny corner cleaves on the fluorite cluster are barely noticeable and are certainly not detracting. Modern classic material from the Nikolaevskiy Mine.
6.3 x 4.8 x 4.0 cm. This is an old Naica specimen (not from the fluorite finds of around 2 years ago), and you can tell by the style. In person these crystals are MUCH brighter and more transparent than the photo makes them appear. They measure to about 1.7 cm across, and they have pretty bevels along the edges.
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Rob Lavinsky, rob@irocks.com
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