This is 'Marie Bracquemond at the Easel' (1890), painted by Édouard Dammouse (French, 1850-1903). Said to be pastel, which seems pretty amazing to me, but presumably right.
Here's what it says on the website I found it on:
Dammouse began his art education with Félix Bracquemond, genre painter, watercolorist, pastel artist and engraver. Alongside Marie Bracquemond, wife of his master and also an artist, he perfected his painting technique. Here, he depicts Marie in the studio drawing, perhaps in the early stages of executing a painting.
He was also a well-known decorator of ceramics. Here's what I found on another website:
Painter and ceramic decorator Edouard-Alexandre Dammousse was born in Belleville, an historically working class neighborhood in Paris, and studied painting under Felix Bracquemond before working with Ernest Chaplet at the Laurin factory. Later he joined the group of artists, including his brother Albert-Louis Dammousse, working, again, under Bracquemond at the C. Haviland studio at Auteuil. After the studio's closure in 1881, he went with Chaplet to the workshop on rue Blomet from 1882-1886. His work there was in naturalistic and oriental styles. He and his brother established a workshop at Sèvres producing stoneware and, later, glass.