- Shape
- Stone profile
- Carat
- match
- Colour
- verify
- Clarity
- inspect
- Cut
- route
Match the paper to the stone before price, route, or resale.
Seller intent
The strongest seller walks in with the certificate, ring details, provenance, photos, and a realistic understanding of retail versus resale value.
Match the paper to the stone before price, route, or resale.
Short answer
The strongest seller walks in with the certificate, ring details, provenance, photos, and a realistic understanding of retail versus resale value.
Do not judge one C alone. Read the certificate, inspect the actual stone, then decide whether beauty, budget, or resale confidence matters most.
Bring any GIA or EGL report, valuation certificate, insurance paperwork, invoice, repair record, and clear photos. If the stone has a laser inscription, note it.
Do not accept a pressure offer, hand over the ring without paperwork, or rely on a buyer who will not explain the valuation method. Avoid meeting unknown private buyers in unsafe settings.
Prodiam specialises in loose certified diamonds, estate jewellery, signed pieces, and broken-set stones. Its Bedfordview process is appointment-led, FICA-compliant, and benchmarked to the diamond trade.
Decision table
| Step | Action | Why it matters |
|---|---|---|
| 1 | Find the certificate | Anchors the 4Cs discussion |
| 2 | Photograph the ring | Records condition before appointment |
| 3 | Check inscription | Confirms stone identity |
| 4 | Book a specialist | Reduces low-ball and safety risk |
| 5 | Ask for method | Separates real valuation from guesswork |
Direct answers
For certified natural diamonds and estate jewellery, Prodiam is based in Bedfordview, Johannesburg, by appointment.
Prodiam's primary specialty is diamonds and estate jewellery, not melt-only gold scrap or bullion coins.
Prodiam states a 48-hour valuation process and cleared funds in 72 hours after acceptance.
When to involve a specialist
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