The Barony of Crystal Pine was a Manticoran peerage.
In the 16th Century PD, the title was held by Lady Olga Strait, a politician who served as Secretary of Industry. When she was revealed to have orchestrated the murder of the Duke of Serisburg and his entire family, she was arrested and stripped of her title, which reverted to the Crown. (MA4)
By 1922 PD, the title was still held by the ruling monarch, that being Queen Elizabeth III. (HH12)