A rich turquoise blue specimen of Hemimorphite from the classic North of England location of Roughton Gill Mine. The Hemimorphite is seen as a light blue sparkling botryoidal coating on the Fe oxide rich matrix. The Hemimorphite also lines vugs on the reverse of the specimen. This mineral was probably first recorded from the mine in 1747, under the name Calamine - a prized addition to a collection of the time. Specimens are now rare, only occasionally seen on the market. A fine example of a now rare specimen.