Rare Dark Smoky Quartz Oreo Quartz from Arkansas

Oreo Cap Smoky Quartz – Magnet Cove, Arkansas
From the famous Magnet Cove district, this striking quartz specimen features the distinctive “Oreo cap” effect – a pale, opaque cap atop deep smoky quartz. This unique zoning occurs when a later generation of lighter quartz crystallizes over an earlier smoky core, preserving a crisp boundary between the two. Tiny indentations indicate previous crystal growth that may have been eroded by geothermal liquids, emphasizing the unique geological history of this specific crystal.

Magnet Cove is well-known among collectors for producing exceptional quartz with unusual growth patterns, and this piece is a textbook example. Whether displayed in a cabinet or admired up close, the sharp contrast and natural geometry make it a standout for both aesthetic and geological collections.

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