Brookite

specimen number:
2063630

location:
Magnet Cove, Hot Spring Co., Arkansas, USA

description:
A set of two nice brookite specimens from this classic locality. Each show blocky semi lustrous black opaque crystals to 0.9 cm in size on matrix. Size provided for the larger of the two examples. The specimen comes with a previous label from the collection of Ray DeMark.

Magnet Cove, Arkansas, is an unusual Cretaceous-age alkaline intrusive complex that intruded into surrounding Paleozoic sedimentary rocks, creating a rich environment for rare titanium minerals through magmatic differentiation and hydrothermal contact metamorphism. Mining and collecting in the cove dates back to the nineteenth century, initially driven by agricultural settlement, regional geological surveys, and later localized mining for titanium ore along with classic specimen recovery. The region is world famous among mineralogists and collectors for producing exceptional specimens of brookite, an iron-bearing titanium oxide mineral. Historically known locally as arkansite, the brookite from this locality typically occurs as lustrous, dark brown to black, highly modified dipyramidal or tabular crystals, making Magnet Cove one of the premier global classic localities for the species.

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