these are my 36 texture drawing, which exploring the visual expression for qualities, features and properties of different materials.
from left to right, top to bottom:

rough, toxic, fragile, conductive,hyaline, atomic

metallic, sheer, seared, elastic, fibrous, flexible

curvilinear, vague, alveolate, tousy, dynamic, mechanical

transparent, translucent, reflective, rocky, sticky, papery

ductile, silky, moist, glossy, harsh, durable

foliated, crystalline, meshy, hairy, shinny, rugged