“Quartz crystals with "belts" of botryoidal, blue-green pumpellyite group mineral or possibly celadonite around the prism, and nearly black spheres (potentially ferrosaponite) as inclusions, with rhombic (pseudo cubic) calcite crystals. In a gas vesicle in black basalt. ”

“Quartz crystals with "belts" of botryoidal, blue-green pumpellyite group mineral or possibly celadonite around the prism, and nearly black spheres of possible ferrosaponite as inclusions, with rhombic (pseudo cubic) calcite crystals. In a gas vesicle in black basalt. ”

“Quartz crystals with "belts" of botryoidal, blue-green pumpellyite group mineral or possibly celadonite around the prism, and nearly black spheres or possible ferrosaponite as inclusions, with rhombic (pseudo cubic) calcite crystals. In a gas vesicle in black basalt. ”

“Quartz crystals with "belts" of botryoidal, blue-green pumpellyite or celadonite around the prism, and nearly black spheres of possible ferrosaponite as inclusions, with rhombic (pseudo cubic) calcite crystals. In a gas vesicle in black basalt. ”

“Quartz crystals with "belts" of botryoidal, blue-green pumpellyite or celadonite around the prism, and nearly black spheres of possible ferrosaponite as inclusions, with rhombic (pseudo cubic) calcite crystals. In a gas vesicle in black basalt. ”

“Quartz crystals with "belts" of botryoidal, blue-green pumpellyite group mineral or possibly celadonite around the prism, and nearly black spheres (potentially ferrosaponite) as inclusions, with rhombic (pseudo cubic) calcite crystals. In a gas vesicle in black basalt. This is a high-res version of the Mindat.org Photo of the Day - 3rd Mar 2018 that I could not substitute because it is "in use", so that is now a child photo. ”