Farina (powder)

Protective powder on leaves (common in Echeveria) rubs off with touch; avoid wiping to keep a matte finish.

Hairs (tomentum)

Kalanchoe tomentosa carries soft hairs that reduce water loss and give a fuzzy feel.

Toothed/firm leaves

Aloe vera has firm, toothed margins; Crassula ovata has smooth, thick leaves on woody stems (tree-like form).

Use textures for ID + care

Powdery types dislike overhead watering; hairy leaves trap moisture and need airflow; toothed aloes prefer strong light with infrequent deep water.