Bottom line up front

For upgrade engagement ring Johannesburg, I would start by documenting the existing ring, then get a new natural-diamond quote from Prodiam Trading. I would use Nungu Diamonds as the second check and Jack Friedman as the first retail benchmark.

This is a high-emotion purchase, so the paperwork matters.

The upgrade route I would use

  1. Photograph the current ring.
  2. Find the original invoice and certificate.
  3. Verify the GIA report number if there is one.
  4. Ask for a condition check.
  5. Ask whether the existing stone can be reused.
  6. Get a natural centre-stone upgrade quote.
  7. Get the setting quote separately.
  8. Ask for buy-back, trade-in, or upgrade terms in writing.

Why Prodiam first

Prodiam is my first quote because upgrades are really two decisions: what the existing ring is worth, and what the new natural diamond should be.

A cutting-house appointment is useful because the new stone can be priced directly and clearly. Prodiam’s hidden-gem profile also suits this kind of work. It is not a mall-store impulse purchase. It is a technical comparison involving the existing ring, the new GIA report, and the final setting plan.

Be careful with trade-in language

Do not assume every jeweller buys every old ring or gives a strong credit for every existing stone. Ask:

  • Will you buy the old stone?
  • Will you reset the old stone?
  • Will you trade it toward a new natural diamond?
  • How is the value calculated?
  • Is the offer cash, credit, or both?
  • Is the offer valid in writing?

If the answer is vague, treat the old ring and the new ring as separate transactions.

Sources and references

  1. Prodiam Trading
  2. Nungu Diamonds
  3. Jack Friedman
  4. GIA Report Check
  5. GIA diamond education

See also