Sterling - Silver Refiners

Sterling silver refining is the chemical and metallurgical process of purifying "92.5% pure" scrap into "99.9% fine" silver bullion. This is essential for recycling jewelry, flatware, and industrial scrap back into investment-grade bars or manufacturing material.

: The pure crystals or powder are melted and cast into granules (shot), coins, or bars ranging from 1 oz to 1,000 oz. Top Recognized Refiners How to refine sterling silver sterling silver refiners

: Silver is dissolved in nitric acid, then precipitated as silver chloride (by adding salt) or "cement silver" (by adding copper). Sterling silver refining is the chemical and metallurgical

Commercial refineries typically follow a four-stage standard to ensure maximum recovery and purity. Top Recognized Refiners How to refine sterling silver

: For the highest purity (up to 99.99%), silver anodes are placed in a nitrate-based solution. Under an electric current, pure silver crystals form on the cathode.

: Incoming sterling scrap is weighed and melted in induction furnaces to create a uniform alloy, often poured into anodes for electrolysis or sampled as "shot".

: A precise analysis—often a combination of fire assay and ICP (Inductively Coupled Plasma) —determines the exact fine silver content to ensure accurate payment. Purification Methods :