Andesite with Amygdules
Andesite is a volcanic intermediate type between silica-poor basalt and silica-rich rhyolite and can have a fine-grained to porphyritic texture composed of sodium-rich plagioclase plus pyroxene or hornblende. Imbedded within are Amygdule pockets and veins of tiny Quartz variations with Quartz crystals sparkling throughout the surface. Collected during my trip to Washington/Oregon . This is another one where pictures just can capture the sparkle seen with the naked eye.
size: 3”w x 2.2”h x 2.5”d
Origin: Washington/Oregon
Andesite is a volcanic intermediate type between silica-poor basalt and silica-rich rhyolite and can have a fine-grained to porphyritic texture composed of sodium-rich plagioclase plus pyroxene or hornblende. Imbedded within are Amygdule pockets and veins of tiny Quartz variations with Quartz crystals sparkling throughout the surface. Collected during my trip to Washington/Oregon . This is another one where pictures just can capture the sparkle seen with the naked eye.
size: 3”w x 2.2”h x 2.5”d
Origin: Washington/Oregon
Andesite is a volcanic intermediate type between silica-poor basalt and silica-rich rhyolite and can have a fine-grained to porphyritic texture composed of sodium-rich plagioclase plus pyroxene or hornblende. Imbedded within are Amygdule pockets and veins of tiny Quartz variations with Quartz crystals sparkling throughout the surface. Collected during my trip to Washington/Oregon . This is another one where pictures just can capture the sparkle seen with the naked eye.
size: 3”w x 2.2”h x 2.5”d
Origin: Washington/Oregon
