This pigment analysis is based on the work of the scientists of the Centraal Laboratorium voor Voorwerpen van Kunst en Wetenschap which is currently the Cultural Heritage Agency of the Netherlands (1).

1 – Discoloured red in the blue tree in the left part of the painting: carmine cochineal lake
2 – Light pink blossom, the top part of the painting: carmine cochineal lake
3 – Branch in the upper right edge: emerald green,  lead white, zinc white, unidentified yellow pigment, carmine cochineal lake, vermilion
4 – Green in the grass, brown at the surface: chrome yellow, Prussian blue, yellow synthetic organic lake
5 – Yellow in the grass: lead white, chrome yellow, synthetic yellow organic lake
6 – Red strokes in the grass: carmine cochineal
7 – Dark red from a tree branch: carmine cochineal lake
8 – Blue sky: lead white, zinc white, viridian, Prussian blue

References

(1) J.H. Hofenk de Graaff, M.F.S. Karreman, M. de Keijzer, W.G.T. Roelofs, Scientific Investigation, in: Cornelia Peres, Michael Hoyle, Louis van Tilborgh,  A Closer look: Technical and art-historical studies on works by Van Gogh and Gauguin, Waanders Publishers 1991.

(1) Cornelia Peres, Michael Hoyle, Louis van Tilborgh,  A Closer look: Technical and art-historical studies on works by Van Gogh and Gauguin, Waanders Publishers 1991.