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Measurements:
38
x 33 x 23 mm The top of the crystal has a ding, with a piece of feldspar in the location of the ding (image bottom right). That is an indication that the damage happened naturally, while forming. Otherwise only a few very minute nicks along the ridges (hardly visible with the naked eye). The bottom of the crystal is uneven, where it parted from its matrix. Weight of Specimen: 35.4 g Chemical Composition:
Al2SiO4(F,OH)2 Hardness on Mohs Scale:
8 Location: Erongo Specimen Code: NER 037 US $ 65
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