Author Anne Bronte was keen rock collector, research shows.

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Anne Bronte was not only a talented writer but also a skilled rock collector interested in geology, researchers have revealed.

The youngest Bronte sister built up a collection of specimens before her death aged 29 in 1849.

It was thought she collected them for their aesthetic value, but research shared by Sally Jaspars has shown she was an informed geology fan.

Ms Jaspers is studying Bronte as part of a PhD at the University of Aberdeen.

She said: "Her interest in geology is mentioned in her literary works - indeed in The Tenant Of Wildfell Hall she references the science and a book by Sir Humphry Davy directly."

Ms Jaspers was helped by Stephen Bowden, from the university's School of Geosciences, who helped to analyse the collection housed at the Bronte Parsonage Museum in Haworth, West Yorkshire. 

Experts from the University of Leeds and a specialist spectroscopy company were also involved, and they found she had carnelians and agates which she collected in Scarborough, where she worked as a governess.

She also had flowstone and a rare kind of red obsidian, which originated outside of the UK.