Quartz schist

From Fresh Dictionary

English

Noun

quartz schist

1. ((geology{{#if:|, {{{2}}}{{#if:|, {{{3}}}{{#if:|, {{{4}}}{{#if:|, {{{5}}}{{#if:|, {{{6}}}{{#if:|, {{{7}}}{{#if:|, {{{8}}}{{#if:|, {{{9}}}}}}}}}}}}}}}}}}})) a metamorphosed schist composed mostly of quartz with some mica and / or tourmaline

zh:quartz schist