Как по Английски будет 珍珠岩

noun

A black, lustrous, brittle mineral consisting of a sulphide of silver and arsenic, ag₁₆ as₈ s₁₁, occurring as tabular crystals of the monoclinic system and usually containing copper in place of some of the silver.

noun

A sediment or sedimentary rock composed of very fine clay or mud particles.

Примеры использования:

The eastern cordillera comprises pelites of pre-ordovician age

noun

A substance originally regarded as a mineral, a hydroxychloride of lead and copper, but now thought to be a mixture of boleite and pseudoboleite.

noun

A form of obsidian consisting of glassy globules, used as insulation or in plant growth media.

Примеры использования:

The mix we use contains compost, peat, perlite, rock phosphates, blood meal, calcite clay and gypsum.

adjective

Of, relating to, or distinctive of perlite; specifically designating a structure in natural glasses characterized by concentric spheroidal cracks.