TC87S3: Group on matrix of prismatic crystals with very well defined faces and edges, and a very bright and yellowish green color. Also from one of the great British mineral localities. It is with a label of the well-known collection of John H. Marshall, of Massachusetts, and a catalog card from the same collection.
Mexico Mine, Roughton Gill, Caldbeck Fells, Allerdale, former Cumberland, Cumbria  England / United Kingdom

Specimen size: 5.1 × 3.6 × 3 cm = 2.01” × 1.42” × 1.18”

Main crystal size: 0.8 × 0.2 cm = 0.31” × 0.08”