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Specimen # BULG4121
and the faces on the Magnetite crystals are rather smooth and shiny
rather lustrous and SMOOTH Spinel-twinned crystals of jet-black Sphalerite are intergrown with very minor Siderite “discs” to create this large thumbnail sized display specimen
The Brookites are a bit thicker than most crystals this size
Fluorite (LARGE bi-color "Spinel-twin") thumbnail Specimen # BULG4121The Fluorite twins from this locality are distinctive and are unique in the world, for the sharpness, gemminess and noteworthy size. Most of the twins I've seen from this area are green in color, but pink examples have been found as well. Here, we have an incredibly large "Spinel twinned" BI COLOR Fluorite specimen that is not only impressive for its size, but its remarkable gemminess. When you backlight the piece, you can see large WATER CLEAR
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