SCHIST

SCHIST

Schist is a medium grade metamorphic rock formed from shales and slates. The mineral crystals in a schist have been flattened into visible thin crystals, resulting in a flaky texture to the rock.

By definition, a schist contains more than 50% of platy and elongated minerals, usually in a quartz and feldspar matrix. Note that even these host minerals may have flattened, distorted crystal shapes.

Amethyst Galleries'
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MINERALS

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IGNEOUS: ANDESITE; ANORTHOSITE; BASALT; CARBONATITE; DACITE; DIORITE; DUNITE; GABBRO; GRANITE; KIMBERLITE; KOMATIITE; LAMPROPHYRES; MONZONITE; OBSIDIAN; PEGMATITE; PERIDOTITE; PUMICE; PYROXENITE; RHYOLITE; SCORIA; SYENITE
METAMORPHIC: GNEISS; MARBLE; QUARTZITE; PHYLLITE; SCHIST; SERPENTINITE; SLATE; SOAPSTONE
SEDIMENTARY: ANHYDRITE; BANDED IRON FORMATION; BRECCIA; CHALK; CHERT; CLAYSTONE; COAL; CONGLOMERATE; COQUINA; DOLOMITE; GEODES; GYPSUM; HALITE; LIMESTONE; MUDSTONE; PHOSPHORITE; SANDSTONE; SHALE; SILTSTONE; TILLITE
UNCONSOLIDATED SEDIMENTS: ALLUVIAL DEPOSITS; LAHARS; MORAINES; PEAT; SANDS; SOILS; TEPHRA; TILLS; ORES; MINING TALUS PILES
PRIMORDIAL: COMETS; ASTEROIDS; METEORITES; CHONDRITES; CHONDRULES; CAI's; PRESOLAR GRAINS; METEORIC MINERALS

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