Natural iron ore contains various impurities in solid solution, which harden the reduced metal by producing irregular-shaped metallic crystals.

The primary chromium ore is the mixed metal oxide chromite, FeCrO, found as brittle metallic black crystals or granules.

Their cities are impressive sights, rising from the flatlands like a growth of metallic crystals.

Inside was a sliver of metallic crystal, shifting between solidity and a shimmering liquid form.

We shall start with metallic crystals, since these provide examples of the simplest crystal structures.

It forms brown to black metallic isometric crystals with a Mohs hardness of 5.5 to 6.

The principles that govern ice crystals apply as well to metallic crystals, whose microscopic structure helps determine the strength of cast alloys.

The girl asks what the guy thinks the ship is made of, to which he responds some sort of metallic crystal.

Quantum Dot, based in Hayward, Calif., introduced its first product to drug researchers in November: a metallic crystal that is bound to a protein called streptavidin.

It forms metallic grey monoclinic crystals.