: Known for large cleavage rhombohedrons of calcite .
Descriptions of rare "large cleavage rhombohedrons" and other crystal habits found within the Starlight mine's shafts. California Water Library or a more technical chemical breakdown of the Nagyagite mineral? Bulletin 42, Gold in Washington - WA DNR starlight nagyagite pdf
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Because it often forms in thin, foliated masses that shimmer under direct light, high-grade specimens are colloquially known as The name evokes the visual effect of a starry night sky—tiny pinpoints of metallic gold and silver reflection bouncing off dark, crystalline surfaces. : Known for large cleavage rhombohedrons of calcite