Rapper Jay-Z spotted wearing a Richard Mille

Jay-Z was recently spotted wearing what can only be described as one of the rarest objects in contemporary horology: a unique-piece Richard Mille RM 56-01 Tourbillon encased entirely in green sapphire crystal, the second bespoke commission of this reference the rapper and entrepreneur has secured from the Swiss manufacture.

The Richard Mille RM 56-01 represents the apex of the brand's material obsession. Introduced as a limited series in 2012, the reference pushed sapphire crystal — already used for exhibition casebacks across the industry — into structural territory never previously attempted at this scale. The case, middle, lugs, and movement bridges are all machined from monocrystalline corundum, a material that rates 9 on the Mohs hardness scale and requires diamond-tipped tools to shape. Machining tolerances are measured in microns. The manually wound tourbillon movement, calibre RM 56-01, beats at 3 Hz and offers approximately 45 hours of power reserve, its going-train and tourbillon cage floating visually in mid-air thanks to a cable-suspension system that isolates the movement from shock — a solution Richard Mille borrowed conceptually from marine chronometer gimbals.

From a collector standpoint, the RM 56-01 in its standard sapphire iterations already commands extreme rarity. Production across all versions has never exceeded a handful of pieces per year, and each case requires months of machining time. A unique piece in a custom color of sapphire — green, no less — elevates the object beyond conventional market categories. Richard Mille has confirmed green monocrystalline sapphire as a commission material only on the rarest occasions, making Jay-Z's example genuinely singular.

Jay-Z's relationship with Richard Mille is well documented. He is among the brand's longest-standing celebrity associates and has previously worn the blue sapphire RM 56, itself a unique piece. Owning two separate unique-piece commissions in the same reference, in different crystal colors, reflects both extraordinary financial access and a genuine collector's logic — treating the RM 56 not as a single trophy but as a study in material variation.

No official retail price exists for this piece. Informed market estimates place the value of a unique-piece RM 56-01 in colored sapphire at approximately three million dollars, consistent with what comparable Richard Mille one-of-ones have achieved at auction. The standard sapphire RM 56-01, when it surfaces on the secondary market, typically trades between 800,000 and 1.2 million USD — underscoring how dramatically bespoke commissions depart from even those benchmarks.