English to Russian Science Geography минералы

Marcasite or “spear pyrites” and its cubic cousin pyrite are mined to produce sulfuric acid. When struck with a hammer,
they produce a sulfureous odor. Both can be polished into bright metallic yellow gemstones.

Properties Brass-yellow or dark
tarnish color, gray-green streak;
metallic luster; orthorhombic
crystal system; hardness 6–6.5;
opaque; “spearhead” crystals,
concretionary habit.

Не совсем понятно, сто означает слово habit : габитус, агрегат или еще что-то. Спасибо за помощь.