Diamond Memo vs Consignment vs Outright Purchase: A Guide for Jewellers

When a jeweller needs a natural diamond, buying it outright is not always the only possible commercial structure. In the diamond trade, stones may also be supplied on memo or placed with a retailer on consignment.

These arrangements can give a jeweller access to a wider selection without purchasing every stone in advance. However, they also create responsibilities relating to ownership, insurance, security, deadlines and payment.

The short explanation is:

• Memo generally provides temporary access to identified diamonds for inspection, selection or a specific customer opportunity.
• Consignment generally places supplier-owned goods with a retailer for a longer or continuing sales period.
• Outright purchase is a sale in which ownership transfers according to the agreed sale terms and the buyer pays according to the invoice.

These are useful trade descriptions, not universal legal definitions. Businesses sometimes use “memo” and “consignment” interchangeably. The written agreement—not the heading placed on the document—determines ownership, risk, payment and return obligations.

This article provides practical commercial guidance for professional jewellers. Individual agreements should be reviewed with the appropriate legal, tax, accounting and insurance advisers.

Memo vs consignment vs purchase at a glance

The rule that prevents most disputes

Four distinctions should be understood before accepting any diamond:

1. Possession is not the same as ownership.
2. Ownership is not the same as responsibility for loss or damage.
3. A grading report is not proof of ownership.
4. A trade label is not a substitute for written terms.

A supplier may continue to own a memo diamond while the retailer bears responsibility for its security, insurance and timely return. Alternatively, risk may transfer at a particular delivery point. The agreement must state which position applies.

Never assume that a diamond is covered simply because it remains the supplier’s property.

What is a diamond memo?

“Memo” is short for memorandum. In a typical diamond memo transaction, a supplier releases one or more specifically identified stones to another trade business without completing a normal outright sale at the beginning of the arrangement.

Memo may be used for:

• A private-client appointment
• Comparing several centre stones
• Inspecting a diamond before making a purchasing decision
• Sourcing an unusual shape, size or quality combination
• Reviewing a matched pair or layout
• Showing a high-value stone for a bespoke commission

Memo is not automatically free stock, a credit facility or an unrestricted right to sell or alter a diamond. The recipient’s authority comes from the written memo terms.

A practical memo workflow

A controlled memo transaction normally follows these stages:

1. Define the customer requirement. Record the shape, carat range, colour, clarity, grading-laboratory preference, budget, setting requirements and appointment date.
2. Request suitable stones. Shortlist only diamonds that have a realistic chance of meeting the brief.
3. Complete supplier approval. Provide any requested business, identity, insurance, credit or trade-reference information.
4. Agree the terms before dispatch. Confirm the identified stones, price, currency, risk, insurance, permitted use, payment trigger and return deadline.
5. Inspect and acknowledge receipt. Reconcile every stone against the supplier’s document immediately.
6. Present the approved stones. Follow the agreement’s rules for customer handling, off-site viewing and temporary mounting.
7. Complete the sale or return the goods. If more time is needed, obtain a written extension before the deadline.

No memo duration should be assumed to be standard. A valid period is whatever the parties expressly agree for that transaction.

What is diamond consignment?

Diamond consignment is normally a more continuing stock arrangement. A supplier places identified goods with a retailer, who displays or markets them without purchasing all the goods at the outset.

When a diamond sells, the retailer reports the transaction and settles with the supplier according to the agreement. Depending on the structure, the retailer may purchase and resell the stone, retain an agreed margin or earn a commission. The contract must explain which commercial model applies.

A proper consignment arrangement should cover:

• The initial inventory schedule
• Permitted sales locations and channels
• Supplier prices and the retailer’s pricing authority
• Reporting frequency
• The event that counts as a sale
• Payment and settlement deadlines
• Inventory reconciliation
• Stock rotation or supplier recall
• Return conditions
• Lost, damaged or missing goods
• Termination of the arrangement

Consignment can expand a retailer’s showroom selection, but it still consumes safe capacity, insurance limits, administration and sales attention. Stock should be reviewed regularly rather than kept indefinitely simply because it was not purchased upfront.

What is an outright wholesale purchase?

With an outright purchase, the retailer enters into a sale and pays according to the supplier’s invoice terms. Ownership and risk pass at the points specified in the contract and delivery terms; they should not automatically be assumed to transfer at the same moment.

Outright purchase is often suitable for:

• Proven fast-moving natural-diamond specifications
• Repeat production requirements
• Calibrated or matched goods used in manufacturing
• Confirmed customer orders
• Stones the retailer wants to control without recall
• Inventory for which replacement availability is strategically important

The buyer receives greater control but also carries the commercial effects of owning the stock. These may include financing costs, insurance, ageing inventory, price movements and the risk that customer demand changes.

An outright purchase does not automatically include a right to return an unsold diamond. Any inspection or return right must be stated in the supplier’s terms.

Which model should a jeweller choose?

Many established jewellers use a hybrid structure: purchasing dependable core stock, sourcing unusual requests individually and using flexible arrangements only where they improve a genuine customer opportunity.

Before selecting stock, learn how to read a wholesale diamond inventory list and apply a consistent supplier-vetting checklist.

What should a memo or consignment agreement contain?

A useful document should answer each of the following questions without relying on verbal assumptions.

For cross-border arrangements or high-value inventory, obtain jurisdiction-specific advice about title retention, enforcement and the treatment of supplier-owned property if either business becomes insolvent.

Receiving memo or consignment diamonds correctly

Every incoming stone should receive its own traceable record. At minimum, record:

• Supplier
• Memo or consignment document number
• Supplier stock number
• Laboratory and report number
• Shape and carat weight
• Agreed value and currency
• Date and time received
• Package condition
• Physical condition
• Insurance status
• Customer or internal purpose
• Return deadline
• Current location
• Final outcome

Reconcile the parcel promptly. Check the number of stones, weights, identifying characteristics, accompanying reports and any inscription where present.

For a GIA-graded diamond, GIA Report Check can confirm that the report information matches the data in GIA’s database. That database check does not, by itself, replace matching the physical stone to the report and inspecting its condition.

Memo and consignment goods should be assigned a separate inventory status from:

• Retailer-owned stock
• Customer-owned jewellery
• Repair items
• Buyback goods
• Manufacturing work in progress

Logical segregation in the inventory system—and physical segregation where practical—reduces mistakes concerning ownership, pricing and returns.

Insurance and security questions to resolve

Never assume that an ordinary shop policy covers entrusted supplier property. Ask the insurer or broker to confirm the position in writing.

Check:

• Whether supplier-owned memo and consignment goods are covered
• The maximum limit per stone, parcel and location
• Cover during receipt and dispatch
• Cover while in transit
• Approved carriers and shipping procedures
• Cover during an off-site customer appointment
• Whether a customer may ever take possession
• Staff-access requirements
• Safe and alarm requirements
• Geographic restrictions
• Policy excess or deductible
• Exclusions for unexplained disappearance
• Claim-notification and evidence requirements

If the agreed value exceeds the applicable insurance limit, do not accept dispatch until the parties and insurer resolve the gap.

Customer presentation, setting and onward transfer

A customer may be allowed to inspect a memo diamond in the jeweller’s premises, but this does not automatically authorise the customer to take it away.

Similarly, the retailer should not:

• Send the stone to another branch
• Give it to an outside setter
• Mount or alter it
• Remove an inscription
• Submit it to a laboratory
• Send it to another buyer
• Allow an unsupervised off-site viewing

unless the supplier has authorised that activity and the insurance arrangement covers it.

If temporary mounting is permitted, document who will perform it, what setting will be used and who bears responsibility for damage.

Handling a sale or return

The agreement should define exactly when a memo or consignment stone becomes payable. Possible triggers may include written acceptance, resale, delivery to the final customer, failure to return by the deadline or another agreed event.

When a stone sells:

1. Update its status immediately.
2. Notify the supplier using the agreed method.
3. Confirm the supplier price and currency.
4. Issue the customer documentation accurately.
5. Pay or settle by the contractual deadline.
6. Retain the required transaction and sourcing records.

When a stone is returned:

1. Reinspect it against the receipt record.
2. Match the stone and report.
3. Photograph and document the condition.
4. Use the approved packaging and carrier.
5. Confirm the shipment’s insured value.
6. Retain the tracking and dispatch evidence.
7. Obtain confirmation that the supplier received and accepted the return.
8. Close the inventory record.

Dispatching a parcel is not the same as completing a return. The record should remain open until receipt is confirmed.

Accounting, VAT and cross-border movement

Supplier-owned diamonds held in a shop should not automatically be recorded as normal purchased inventory. The correct accounting treatment depends on the agreement and the business’s applicable accounting rules.

Likewise, describing a transaction as “memo” does not automatically remove VAT, customs, import, export or reporting obligations. Cross-border movement may create obligations even when legal title remains with the supplier.

For goods moving through Belgium from outside the EU, consult the Antwerp Diamond Office import-process guide. For movements between EU member states, review the intra-EU diamond-shipping guide and obtain transaction-specific VAT advice.

The Belgian FPS Economy diamond guidance explains registration and administrative obligations for Belgium-based diamond dealers and provides access to a dealer-registration search.

Sourcing and traceability records should remain connected to each stone throughout the transaction. The Responsible Jewellery Council Code of Practices provides a recognised industry framework for supply-chain due diligence and accurate product disclosure. Businesses trading across the EU should also check the European Commission’s current diamond-restrictions guidance.

How suppliers assess memo and consignment requests

Flexible trade terms expose the supplier to inventory, credit and enforcement risk. Approval is therefore normally selective.

A supplier may consider:

• Legal company verification
• VAT and registration information
• Ownership and authorised signatories
• Physical trading address
• Experience in the jewellery industry
• Trade references
• Previous purchasing and payment history
• Credit information
• Insurance and security arrangements
• Country and delivery destination
• Value and type of goods requested
• The quality of the underlying customer opportunity
• Identity, sanctions and compliance checks

A first transaction may therefore be structured as an outright purchase even if more flexible terms could be considered after a trading history is established.

Practical example: sourcing three oval diamonds

A customer has booked an appointment to choose an oval natural diamond for a bespoke engagement ring.

The jeweller records the customer’s:

• Carat range
• Colour and clarity preferences
• Dimensions and length-to-width preference
• Fluorescence tolerance
• Grading-report preference
• Budget
• Appointment date

The supplier identifies three relevant stones and, after approving the retailer and confirming written terms, releases them on memo.

On arrival, the retailer:

1. Reconciles the stones against the memo.
2. Verifies each grading-report record.
3. Inspects and records each diamond’s condition.
4. Stores the diamonds under the correct inventory status.
5. Presents them under controlled conditions.

The customer chooses one. The retailer reports the selection, and that stone becomes payable according to the agreed trigger. The other two are reinspected and returned through the approved insured method before the deadline.

This is where memo is most useful: a defined client, a clear brief, a realistic selection and a controlled process.

Common mistakes to avoid

• Accepting goods without signed or accepted written terms
• Assuming supplier ownership means the retailer has no liability
• Treating memo as free or indefinite inventory
• Failing to verify insurance before dispatch
• Mixing supplier goods with owned or customer-owned stock
• Recording only the grading report number and not the supplier stock number
• Letting a customer or setter take possession without authorisation
• Altering or mounting a diamond without written permission
• Missing a return deadline without requesting an extension
• Assuming a quoted price remains open indefinitely
• Failing to report a consignment sale promptly
• Treating a tracking receipt as final confirmation of return
• Making VAT or customs assumptions based only on the word “memo”

Frequently asked questions

Discuss your wholesale diamond requirement

Dalila Diamonds’ B2B sourcing service supports professional buyers seeking documented, laboratory-graded natural diamonds through Antwerp.

To discuss an outright wholesale purchase or ask whether an alternative trade arrangement may be available for selected goods, contact Dalila Diamonds with:

• Company name and country
• VAT or registration number
• Required diamond specifications
• Budget or target wholesale range
• Intended use
• Required date
• Delivery destination
• Preferred purchasing model

Alternatively, email business@daliladiamonds.com with the subject:

Wholesale Terms Enquiry – [Company] – [Purchase/Memo/Consignment]

Memo, consignment and credit are not guaranteed. Any alternative arrangement remains subject to company verification, risk and insurance review, stock availability and written approval.