hematite

/hee-muh-tahyt, hem-uh-/US // ˈhi məˌtaɪt, ˈhɛm ə- //UK // (ˈhɛmətaɪt) //

赤铁矿,赤铜矿,赤土,赤玉

Definitions

n.名词 noun

1
- : a very common mineral, iron oxide, Fe2O3, occurring in steel-gray to black crystals and in red earthy masses: the principal ore of iron.

An iron oxide called hematite improves tone, and acetylglucosamine, an enzyme derived from sugar, exfoliates for extra glow.
Ferruginous masses, probably consisting of brown hematite, come also from this island.
The ore used was from Bilbao, and known as the Ruby Mine, and was a good average hematite.
Papa says the Craven mines are remarkable, the new one with all that hematite is a fortune by itself.
The streak of limonite is yellow, thus distinguishing it from hematite.
He takes the softest hematite, grinds it upon a porphyry slab; and then carefully elutriates it.