(Born: Union, New Jersey, U.S.A., 18 June 1872; Died:      ) American mineral dealer & collector.

For a few years, Hopping operated his own New York City mineral store on Dey street. He issued several small catalogs and bulletins. Eventually, he merged with William Niven to form the firm of Niven and Hopping of New York City during the 1890s. But after this short lived partnership, he is listed in the Naturalists' Directory of 1894 as a collector of minerals, crystals and butterflies. He appears to have died sometime after 1930.

Biographical references: MRLA: Mineralogical Record Label Archive. • Naturalist's Directory: 1894-1895.

Catalogue, 1899

1. English, 1899 [Sale catalog].
Catalogue and Price List | of | Minerals | For Scientific and Educational Purposes. | [ornament] | Roy Hopping, | 5& 7 Dey Street, | New York, U.S.A. | 1899.

8°: [1]-66 p., 10 plates, illus. Plate one being a portrait of Hopping with his signature. Page size: 224 x 160 mm. Very rare.

Contents: [1-2], Title page, verso printer and engraver information.; [Plate one, portrait of Hopping].; [3], "Contents."; [4], "Students Collections."; [Plate II, Krokoite].; 5-64, Text of mineral catalog.; 65-66, "Books."

Bibliographical references: NUC. • USGS Library Catalog.

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