Exceptional pieces, handled with discretion.
Private sale, exchange and sourcing conversations for diamonds, gemstones, signed jewellery and important collections—subject to ownership, authenticity and condition review.
Discreet facilitation
Recognised marques. Item-level verification.
Substrat may facilitate transactions involving leading houses and specialist pieces. A brand name is not proof of authenticity, ownership, condition or availability; every proposed item is considered individually.
Tap a brand to see reference examples and the official maker’s collection—for visual reference only, not Substrat inventory or an affiliation.
View illustrated watches & jewellery
Published catalogue
Available now.
Only approved items with confirmed details appear here. Prices display in naira and US dollars only when each amount has been supplied and approved.
No items are publicly listed in this category yet.
We can still receive a private owner mandate or discuss a buyer’s sourcing requirement. Nothing will be presented as available until its details are approved for publication.
Ownership or authority reviewed
Authenticity evidence assessed
Condition and terms confirmed before publication
Quietly offered. Carefully checked.
Confidentiality without anonymity: private presentation, verified authority and controlled introductions.