TB58T1: Group of three doubly terminated crystals, with a good definition of terminal faces and growths of a fibrous aspect on the prism. The prisms have a very good geometrical color zoning, which is perpendicular to the main orientation of the crystal.
The sample is from the John H. Marshall collection, as the catalog number of register on the piece shows, though we don’t have the original label from John.
The specimen has been photographed and published in the magazine ‘Paragénesis’, number 01/2020, page 61
Himalaya Mine, Gem Hill, Mesa Grande District, San Diego County, California  USA

Specimen size: 4.7 × 2.2 × 2.3 cm = 1.85” × 0.87” × 0.91”