Blackened Steel Tiaras
Between the years of 1912-1915, Henri Picq made about five or six blackened steel tiaras for Cartier. Only three of them are known to still exist.
Fürstenberg Blackened Steel Tiara, 1912
Marghiloman Blackened Steel Tiara, 1914
Sassoon Ivy Blackened Steel Tiara, 1914
Tiara Materials 1 of ∞
Source: tiaramania