Free Ash PBR materials

Welded volcanic tuff, compacted ash with fiamme lenses and a gritty sandstone feel. Colors run from tan to charcoal. The texture is uneven but cohesive.

Volcanic pumice, vesicular and abrasive, pale gray with glassy bubble walls. The texture is sponge-like at macro scale. Ash dust clings in the pores.

Molten lava cooled into pahoehoe, ropey folds of black glass with a few still-dull orange seams. Fine hairline cracks follow the flow. Ash dusts the low spots.