Laumontite with Thomsonite-Ca

specimen number:
2063834

location:
Bear Creek Quarry, Drain, Douglas Co., Oregon, USA

description:
Very sharp white opaque prismatic crystal grouping of laumontite 2.8 cm in length set with several smaller crystals on matrix with orange iron oxide coated micro crystals of thomsonite-Ca. Choice thumbnail for the species, this is in very good condition.

Bear Creek Quarry, located near Drain in Douglas County, Oregon, is a famous Pacific Northwest mineral locality situated within Eocene basaltic volcanic formations. Mining operations at the quarry primarily excavated crushed stone and aggregate from deeply weathered basalt flows and breccias. The site achieved legendary status among mineral collectors due to hydrothermal activity that filled vesicles and cavities within the basalt with outstanding zeolite group species. Collectors frequently targeted the locality for exceptional cabinet specimens of lustrous chabazite crystals, clear quartz, microcline, dark green celadonite, and spectacular sprays of white to colorless mesolite needles. Though access to active quarry faces has varied over the decades, Bear Creek Quarry remains documented as one of the premier classic mineral localities in Oregon for fine crystalline zeolites and associated cavity minerals.

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