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small, rounded masses resembling cotton balls. Crystals are rare but will form fibrous, elongated crystals either oriented parallel or radial to each other. Crystals may also be acicular, resembling needles (Anthony et al., 2005). The point group of ulexite is 1, which means that the crystals show very little symmetry as there are no rotational axes or mirror planes. Ulexite is greatly elongated along [001]. The most common twinning plane is (010). Ulexite collected from the Flat Bay gypsum quarry in

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