Angela Ottino della Chiesa argues that this is the London version. The Louvre version was first mentioned as part of the royal collection at Fontainebleau in 1625. The London version, which remained in the church of San Francesco il Grande in Milan until 1781, was taken to the hospital of Santa Caterina in Milan and purchased in 1785 by the English painter Gavin Hamilton. It was in the collection of the Marquis of Lansdown, then the Earl of Suffolk, before entering the National Gallery in 1880. Dark in color, very hard, low permeability.
Fractures normally occur in parallel patterns.
It is similar to the larger-scale exfoliation produced usually by mechanical weathering. This page has been sponsored by Ada DiLoreto in honor of Leonardo da Vinci. To find out how to become a pioneer and homestead on the Leonardo WWW Site, contact the Frontier Properties Sales Office .