The ledger
Where every stone comes from
Each kind of stone and metal we use, where it was mined, grown or refined, and who we buy it from. The paperwork for your own stone comes with the piece.
Lab-grown diamonds
- Origin
- Grown in Surat, India, by chemical vapour deposition
- Bought from
- One grower, visited in 2023
- Paperwork
- IGI report with every stone over 0.3 ct
Chemically the same as a mined diamond, at about a quarter of the price. We tell you which is which, always.
Natural diamonds
- Origin
- Botswana and Canada, mine of origin stated
- Bought from
- A Kimberley Process member dealer in Antwerp
- Paperwork
- GIA report and a mine-of-origin statement
Bought only with a named mine. We will not set a natural diamond whose origin we cannot state.
Blue sapphires
- Origin
- Ratnapura, Sri Lanka
- Bought from
- A family cutter we have bought from since 2013
- Paperwork
- Our own origin note, lab report on request
Unheated where we can find them, and we tell you when a stone has been heated.
Emeralds
- Origin
- Muzo, Colombia
- Bought from
- A dealer in Bogotá, through a Miami importer
- Paperwork
- Lab report stating any oil treatment
Almost every emerald is oiled; we say how much, and never set a resin-filled stone.
Gold
- Origin
- Recycled, refined in Florida
- Bought from
- A refiner certified by the Responsible Jewellery Council
- Paperwork
- Refiner's certificate for each batch
All our gold is recycled. We can also melt your own old gold into the new piece.
Platinum
- Origin
- Recycled, refined in Florida
- Bought from
- The same refiner as our gold
- Paperwork
- Refiner's certificate
950 platinum, hallmarked, heavier and whiter than white gold and never needs replating.