This specimen features radiating needle-like millerite crystals from the world-class 1990s find at Thompson, Northern Manitoba, a discovery that has not been replicated since. The millerite aggregates form interlocking balls of radiating crystals, with exposed cross-sections along the edges that highlight this unique growth habit. Under a microscope one can see many micro (<1mm) calcite (possibly quartz?) crystals sprinkled all over the the specimen, culminating into several dense grey patches seen mainly at the centre-top of the specimen. The greenish-metallic tufts of millerite, a nickel sulfide, display a rich, velvety luster with an iridescent tarnish, making this piece a stunning example of the species. Found during a mid-1990s collecting effort by Mary Lewardny, these specimens have become increasingly rare on the market and are considered classic Canadian material.
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