2.0g Welo Opal

Price: $15.00/gram

Welo Opal is produced from a single area of stratified volcanic rocks. The main vein is an Opalized Rhyolitic Ignimbrite up to one meter thick that overlies a base of clay. The opal likely formed as silica-bearing waters accumulated on top of the impermeable clay. Silica gel entered the pores of the Ignimbrite which was later transformed into Opal.