sericite lumps

例句：

1. 1. The mineral deposit is composed mainly of sericite lumps.
   该矿床主要由硅石块组成。
2. 2.These sericite lumps are highly sought after for their unique properties.
   这些硅石块因其独特的性质而备受追捧。
3. 3. In the field of geology, sericite lumps play a crucial role in weathering processes.
   在地质学领域，硅石块在风化过程中起着至关重要的作用。