Green Peter Dam, Quartzville Mining District, Linn County, Oregon, USA
Twinned chabazite crystals (var. "phacolite"), 5 mm. Ex Myer Crumb, collected 1967 or earlier. K. Nash specimen and photo.
Flat lapped specimen of porphyry with feldspar group minerals in cross section. Green Peter Dam, Sweet Home, Linn, Co., Oregon, USA
Thompsonite crystals. Dionne collection, ex Milton Speckels collection.
© Dick Dionne
A cluster of sharp shiny white stilbite crystals up to about 4cm. X Walt Lidstrom specimen. The scale under the specimen is an inch with a rule at one cm.
© Rock Currier
Mass of crystals 2.7cm across. Photographed by, and in the collection of Karl Volkman.
© Karl Volkman
Stilbite Size: 3x3x1.5cm
Rhyolite. Green Peter Reservoir. Sweet Home, Line Co., Oregon, USA
© Steve Ewens 2022
Rhyolite exhibiting scenic patterning.
Butterflied specimen of Rhyolite. Green Peter Reservoir, Sweet Home, Line Co., Oregon, USA.
Heulandite on unknown matrix.
© Jolene Buttolph
Butterflied specimen of Rhyolite. Note clasts and iron staining.
Cloudy plate of levyne, nestled amongst other zeolites. Specimen was obtained off the giveaway tables at the 2017 Cleveland Micromineral Symposium. Photo and specimen: Steve Stuart.
© SMS 2017
Rhyolite. Butterflied and polished specimen. Green Peter Dam, Sweet Home, Line Co., Oregon, USA
Rhyolite from Green Peter Reservoir.
Quartz, var Jasper, var, Chalcedony. Green Peter Reservoir, Line Co., Oregon USA
Flat lapped matrix specimen showing crystals in cross section. Feldspar Group. Green Peter Dam.
View from Green Peter Dam, January 1, 2022