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In jewellery, you deposit fine metal with a founder who returns worked pieces. The metal account tracks the fine-metal balance per supplier and per metal (gold, silver, platinum, palladium), always in fine weight (grams of pure metal), never in gross weight. The balance lives on a dedicated stock lot, per supplier and per metal. Every account movement is a movement of that lot, traced and linked to the record that produced it.

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Inflows and outflows

The account moves from your records, both ways. The base weight comes from the fineness: base = gross weight × fineness (925‰ for silver, 750‰ for 18-carat gold).
  • Outflow (debit): a receiving of worked pieces consumes the deposited metal. The applied total is base + loss (the founder charges a working loss).
  • Inflow (credit): a shipment of pieces returned to the founder puts metal back on the account. The credited total is base − loss (some founders deduct a loss on returned pieces).
Pieces with no metal weight entered contribute no fine metal: they are flagged on the record rather than silently counted as zero.

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Loss rates

Loss rates are configured per supplier, per alloy and per flow:
  • receiving = a surcharge added to the debit,
  • shipment = a deduction removed from the credit.
There is no default and no fallback: an unconfigured pair simply means no loss. A single document can mix several alloys with different rates.

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Setup

An administrator installs the extension, which creates the dedicated schema, then configures:
  • the alloys (metal and fineness),
  • the fine-metal article per metal,
  • the eligible suppliers,
  • the stock lot that holds the balance, per supplier and per metal,
  • the loss rates per supplier, alloy and flow.

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Day to day

1

Open an eligible record

On a receiving or shipment for a configured founder, the Metal account card shows the per-metal detail: base, loss, total, and the balance before and after.
2

Apply

The lot balance is updated by a stock movement, traced and linked to the record. A record can only be applied once; if the movement fails, it returns to pending and stays replayable.
3

Or ignore

Skip a record that should not touch the account, with a reason. An already-processed record shows its recap.

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Manual corrections

Since the balance is a stock lot, you can adjust it directly with a stock correction, without going through a record. This is useful to reconcile the account with a real weighing: you enter either a delta (a weight to add or remove) or an absolute value (force the balance to a given weight). The correction is traced like any stock movement.
The shipment (credit) side is rolling out. The receiving (debit) side is available.