Mimetite Var. Kampylite – Dry Gill Mine, Caldbeck, Allerdale, Cumbria, England
Ex collection Émile Deyrolle (1838–1917)
 
Historical stage of the phosphorus-containing mimetesite variety campylite on foliated snow-white barite. The orange-brown spherical crystals stand out beautifully from the black matrix.
Collection piece with good shine from the famous Dry Gill Mine.
 
Émile Deyrolle (1838-1917) was a French naturalist and natural history dealer in Paris. The shop originally belonged to his grandfather, the naturalist Jean-Baptiste Deyrolle, who opened his shop in 1831 at 23 rue de la Monnaie. Émile's father Achille Deyrolle ran the business for many years. Émile took it over in 1866. The 1881 (and current) address was (and is) 46, Rue du Bac, the former home of Jacques Samuel Bernhart. Deyrolle specialized in natural history publications and specimens, minerals, rocks, fossils, botanical specimens, shells, specimens, microscopic specimens and microscopes.