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Match the paper to the stone before price, route, or resale.
Rings and settings
An upgrade means trading your current stone toward a bigger or better one. The economics depend on who handles both sides.
A diamond upgrade is not a simple swap. Your current stone is valued, a credit is applied, and you pay the difference toward a new certified natural diamond. The gap between what you paid originally and what your stone is worth now is real, and it matters to budget the transaction correctly.
Certificate first
4Cs together
Specialist route
Inspection lens
VerifyReport, inscription, measurements
InspectLight return, tint, inclusions
CompareCut, colour, clarity, carat together
RouteBuy, sell, insure, or value differently
Short answer
An upgrade means trading your current stone toward a bigger or better one. The economics depend on who handles both sides.
A diamond upgrade is not a simple swap. Your current stone is valued, a credit is applied, and you pay the difference toward a new certified natural diamond. The gap between what you paid originally and what your stone is worth now is real, and it matters to budget the transaction correctly.
Use this rule
Do not judge one C alone. Read the certificate, inspect the actual stone, then decide whether beauty, budget, or resale confidence matters most.
How upgrade economics actually work
Retail upgrade programmes at chain stores typically offer 20 to 40 percent of the assessed value of your current stone as credit toward a new purchase. That credit is tied to their inventory and their pricing. A specialist dealer values your stone against real trade benchmarks and prices the new stone at manufacturing cost, not retail markup. The difference in where each number sits changes the out-of-pocket gap materially.
What your current stone is worth toward an upgrade
The trade-in value of your current stone depends on its 4Cs, the grading certificate, the lab, its make, and current demand for that specific type of stone. A well-cut, certified, near-colourless 1ct stone in steady demand trades better than a poorly documented stone of similar size. Understanding the realistic trade-in value before entering an upgrade conversation avoids surprises.
Sourcing the upgrade stone at manufacturing cost
A direct manufacturer buys rough diamonds and produces the polished stone. That removes one layer of wholesale and the retailer's margin from the purchase price. For an upgrade, that matters because the larger stone you are acquiring carries a higher absolute price, and the difference between retail and manufacturing cost can represent tens of thousands of rand on a 2ct or above stone.
The Prodiam upgrade route
Prodiam is a De Beers DBCM Emerging Beneficiation Customer since 2019, with direct rough diamond access. As a direct manufacturer through Procut DCW, they source polished stones at manufacturing cost and can value your existing certified natural diamond against real trade benchmarks. The 30 to 40 percent saving versus retail pricing means the upgrade gap is smaller. By appointment in Bedfordview. Contact: sales@prodiam.co.za or +27 11 334 9010.
Decision table
Use the details, not a shortcut.
| Upgrade route | Trade-in offer level | New stone pricing |
|---|---|---|
| Chain retailer upgrade programme | 20 to 40% as in-store credit | Full retail price |
| Independent jeweller | Negotiated, varies | Retail or near-retail |
| Specialist dealer (direct manufacturer) | Closer to trade market value | Manufacturing cost, not retail |
| Prodiam | Trade-benchmark valuation | 30 to 40% below retail via direct manufacture |
Direct answers
Common questions
Do I have to use my original jeweller for an upgrade?
No. You are free to take your stone to any buyer. A specialist who values the stone on its merits, rather than to retain you as a customer, may offer a better trade-in.
What grading report do I need for an upgrade?
A GIA or equivalent grading report makes the trade-in valuation faster and more accurate. Without it, the buyer must price in uncertainty, which reduces what they offer.
How much does a diamond upgrade cost?
It depends on the size and quality of the new stone, the trade-in value of your current stone, and who you buy from. Manufacturing-cost sourcing reduces the gap versus retail-priced upgrade programmes.
Can I upgrade to a different shape?
Yes. Shape change is common in upgrades. Round to oval, round to pear, or other transitions. The new stone is sourced to the shape and quality you specify.
Does fluorescence affect the upgrade trade-in value?
It can. Strong fluorescence can affect appearance in some stones and is factored into valuations. A grading report that documents fluorescence gives both parties a shared baseline.
Is Prodiam's 30 to 40 percent saving guaranteed?
The saving reflects the difference between manufacturing-cost sourcing and standard SA retail pricing. Exact figures depend on the specific stone. Prodiam provides a documented price before any commitment.
When to involve a specialist
If there is a real diamond, the next step is a certificate-led conversation.
Bring the grading report, photos, invoices, valuations, and any estate paperwork. The goal is to move from generic advice to a stone-specific view.
Sources used