examining the rugged exterior of a stony capsule shell a detailed look at texture surface features and potential

shell exterior rough texture appearance irregular bumpy coarse grainy pebbled weathered brittle fragmented particulate chunky uneven nodular pitted granular speckled mottled marbled veined fibrous ridged furrowed corrugated striated scaly papillary keratinous keratotic cracked fissured crackled crazed roughened weatherbeaten porous perforated granulated lumpy bony geological biological mineral composition formation erosion weathering morphology detail closeup science geology structure natural physical layered fragmentation marks surface pattern