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72 Grams of an Unknown Gold Alloy just waiting on a Refine to Shine!

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161 views7likes1:10:40MicroNova-MetalsOriginal Release: 2026-06-19

Gold refining involves a multi-stage process where impure gold alloys are progressively cleaned through chemical reactions: first, the alloy is melted with fine silver and poured into nitric acid, which dissolves silver and copper while leaving gold behind; the resulting gold nuggets undergo repeated hot water and hydrochloric acid boils to remove remaining impurities; finally, the gold is dissolved in aqua regia (a mixture of hydrochloric and nitric acid) and precipitated using sodium bisulfite (SMB) to produce pure gold.

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