Blue Biggs Jasper stone. Blue Biggs Jasper is a silicated volcanic ash. It was formed during a volcanic eruption and is part of a Miocene series of rocks called the John Day Formation, near Biggs, Oregon, USA. It is a decorative stone used for jewellery and trinkets.
Opal Pool—Willamette National Forest, Oregon: A leap into the refreshingly brisk waters of Opal Pool should come with an automatic membership into the Polar Bear Club -- even during the dog days of summer, the waters hover near a bracing 42 degrees. Luckily, you will have worked up quite a sweat by the time you reach the pool, after a 3.5-mile hike through the old-growth Douglas firs of the Willamette National Forest’s Opal Creek Wilderness Area.