Jewellery Mfg Scrap
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Bench filings & clippings
Jewellery Manufacturing Scrap – Gold, Silver, Platinum & Mixed Precious Metal Scrap for Refining
Buy jewellery manufacturing scrap – gold, silver, platinum, and mixed precious metal scrap from casting, polishing, and bench work. Ideal for refiners and precious metal recyclers. Contact us for bulk orders. Delivery by air, land & sea worldwide. Standard & express shipment available.
Our Jewellery Manufacturing Scrap consists of high-value precious metal waste generated during the production of fine jewellery. This scrap originates from jewellery factories, workshops, and ateliers, including casting sprues, bench filings, polishing dust, floor sweeps, crucible residues, depleted plating solutions (containing gold/silver/platinum), and rejected castings.
Unlike consumer jewellery scrap (old rings, chains, etc.), manufacturing scrap is often cleaner, has a known base alloy composition, and offers excellent recovery rates for refiners. Material typically includes karat gold (10K, 14K, 18K, 22K), fine silver, sterling silver, platinum, palladium, and various alloy combinations.
Types of Jewellery Manufacturing Scrap (Included in Mixed Lots):
| Scrap Category | Description | Typical Purity/Content |
|---|---|---|
| Casting sprues & buttons | Leftover metal from investment casting trees | Same as original alloy (10K–22K gold, platinum, silver) |
| Bench filings & sweeps | Metal filings collected from bench drawers and trays | High-grade, mix of alloys |
| Polishing dust & vacuum bags | Fine dust from grinding, polishing, buffing wheels | Low to moderate (10–50% metal, rest abrasives) |
| Floor sweeps | Swept material from workshop floors | Low concentration – requires smelting |
| Crucible & melting dish residues | Remnants stuck to crucibles | High-grade but mixed |
| Rejected castings / broken pieces | Defective or incomplete jewellery pieces | Same as original alloy |
| Filings from sizing/re-sizing | Small shavings from ring sizing | High-grade |
| Depleted electroplating solutions | Spent cyanide or acid gold/silver/rhodium baths | Low concentration (ppm) – specialist recovery only |
| Polishing compound residues | Cloths, wheels, compounds with embedded precious metal dust | Variable |
Typical Metal Composition by Alloy Type (Gold-Based):
| Alloy | Gold | Silver | Copper | Zinc/Nickel | Other |
|---|---|---|---|---|---|
| 10K Yellow | 41.7% | 10–20% | 30–40% | 5–10% | |
| 14K Yellow | 58.3% | 4–20% | 20–30% | 5–10% | |
| 18K Yellow | 75.0% | 4–15% | 5–15% | 0–5% | |
| 22K Yellow | 91.7% | 2–5% | 2–5% | 0–2% | |
| 14K White (Ni) | 58.3% | 10–20% | 10–20% | 10–15% Nickel | 0–5% Zn |
| 14K White (Pd) | 58.3% | 10–20% | 5–10% | 0–5% | 8–12% Palladium |
| 18K White | 75.0% | 0–10% | 0–5% | 0–10% | 10–20% Palladium/Nickel |
Silver-Based Scrap:
| Material | Silver Content | Other Metals |
|---|---|---|
| Sterling silver scrap | 92.5% | 7.5% Copper |
| Fine silver filings | 99.9%+ | Trace |
| Argentium silver | 93–96% | Copper, germanium |
Platinum & Palladium Scrap:
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Platinum casting sprues (950 Pt, 5% other metals)
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Palladium white gold sweeps
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Platinum polishing dust (fine, high value)
Expected Precious Metal Yields (Mixed Manufacturing Scrap – Unprocessed):
| Scrap Grade | Gold (g/kg) | Silver (g/kg) | Platinum (g/kg) | Notes |
|---|---|---|---|---|
| High-grade (sprues, filings, rejects) | 200–800 g | 10–200 g | 0–50 g | Direct melt + assay |
| Medium-grade (bench sweeps, mixed dust) | 20–150 g | 50–300 g | 0–10 g | Needs concentration |
| Low-grade (floor sweeps, vacuum bags) | 2–20 g | 10–100 g | 0–2 g | Requires smelting |
| Polishing compound waste | 5–50 g | 20–200 g | 0–5 g | Ash then refine |
Actual yields depend strongly on original alloys and how much abrasive material is present.
Processing Methods for Refiners:
| Scrap Type | Recommended Method |
|---|---|
| Sprues, filings, solid pieces | Direct melt in induction/crucible → sample → refine |
| Bench sweeps (low abrasive) | Incineration → screening → melt or leach |
| Polishing dust & floor sweeps | Incineration (burn off organics) → pass through hammer mill → gravity separation → smelt with fluxes |
| Vacuum bags | As above, recover metals from bagging material |
| Depleted solutions | Ion exchange, cementation, or electrolytic recovery (specialist) |
Safety / Compliance:
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Polishing dust may contain fine combustibles (risk of flash fire) – handle with care
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Floor sweeps may contain silica, abrasives – use respirator
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Depleted cyanide solutions require licensed hazardous waste handling
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We sell only non-hazardous solid scrap; liquids not included unless specified.
Available Quantities:
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Sample lots: 100g – 500g (for assay testing)
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Small lab packs: 1kg – 5kg
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Workshop cartons: 10kg – 25kg
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Bulk drums: 50kg – 200kg
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Factory pallets: 500kg – 1,000kg
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Container loads available for large-scale refiners
Quality & Condition:
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Mixed lots contain a variety of scrap types – we can customize (e.g., sprues-only, sweeps-only)
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Some material may contain stones (CZs, diamonds) – we do NOT remove them; they add weight without precious metal value unless specified.
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No electronic scrap, no medical waste, no mercury.
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Lot composition disclosed as: % high-grade solids, % sweeps, % dust (estimated).
Why Choose Our Jewellery Mfg Scrap?
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Direct from jewellery manufacturing sources – no consumer mixing
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Known alloys – many lots have manufacturing records
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Higher gold concentration than most e-waste or dental scrap
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Reliable monthly volume for repeat supply
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We provide representative samples for assay before bulk purchase
For more inquiries or to place an order (samples, trial lots, or bulk drums), please contact us.We deliver by air, land, and sea — internationally. Standard and express shipment options available.
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