• The gold-bearing quartz is crushed to powder .
• Crude barite is ground ( or reduced ) ( to fine powder ).
• The gold-bearing quartz is crushed to powder .
• Crude barite is ground ( or reduced ) ( to fine powder ).
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012