A type of mineral deposit that forms when hot water containing dissolved minerals flows into cracks in rocks and cools down.
Speises are interesting because they are formed by natural processes and can contain valuable minerals.
Examples:
The miners found a speises in the cave.
Speises are often found near volcanic areas.
The speises in the rock sparkled in the sunlight.
The speises looked like shiny rocks.
The speises was full of valuable minerals.
The speises was like a treasure hidden in the earth.