Her face was dark in the shadowy place.
He has a dark complexion.
I was a fool to lose you in the darkness.
There are seven major cupreous ore veins being of certain industrial significance.
As there is no light, the room is extremely dark and nothing can be seen.
In the darkened room, the din of yesterday was going on again.
The Tanzanite weighs.95 Carat Total Weight.
Late at night, nothing can be seen in the dark room.
Tetrahedrite minerals in different types of gold deposits have different characteristic parameters.
Tetrahedrite is a common cupreous sulfide mineral in the Ashele volcanic massive sulfide deposit.