Five families · one standard
Stones
We work with only five families of gems — and buy fewer than one in a thousand of the stones we are shown.
01 / 05
Ruby
The king of gems. We buy only unheated rubies from Mogok and Mozambique, and only those that keep their fire in shadow.
- Origin
- Mogok, Myanmar
- Grade
- Pigeon’s blood, unheated
- Sizes we set
- 0.5 – 6 ct
02 / 05
Sapphire
From the velvet blue of Kashmir to the bright cornflower of Ceylon. Every sapphire is cut in Geneva to keep its weight honest.
- Origin
- Kashmir · Ceylon
- Grade
- Cornflower & royal blue
- Sizes we set
- 1 – 22 ct
03 / 05
Emerald
Muzo emeralds with their “jardin” left visible: we prefer a living stone to a perfect, treated one.
- Origin
- Muzo, Colombia
- Grade
- Minor oil or none
- Sizes we set
- 1 – 15 ct
04 / 05
Diamond
Exceptional white diamonds, mostly D to F colour, traced from mine to atelier with a passport for every stone.
- Origin
- Botswana · Canada
- Grade
- D–F colour, IF–VVS
- Sizes we set
- 0.3 – 30 ct
05 / 05
Pink sapphire
Madagascar’s gift: every shade from blush to hot fuchsia. The stone of our Rose collection since 1952.
- Origin
- Madagascar
- Grade
- Hot pink to dawn rose
- Sizes we set
- 1 – 8 ct