NB26AF1: Parallel aggregate of sharp Euclase crystals with well-defined faces and edges, transparent, bright, with a nice and uniform blue color. Partially coated by small white Calcite crystals. An excellent miniature.
This specimen has been photographed and published in the bulletin ‘MiniBul A.G.A.B.’ on page 18 of number 2/2021

La Marina Mine is located in Pauna Municipality, Boyacá Department, Colombia, within the western emerald mining zone of the country. It belongs to the Western Emerald Belt, where deposits occur in fractured and sheared Cretaceous shales and limestones that acted as conduits for beryllium-rich hydrothermal fluids. In this geological setting, metasomatic processes produced La Marina emeralds, associated with carbonates, pyrite, quartz, and fluorite, within a structural context controlled by Andean compressive tectonics.
La Marina Mine, Municipio Pauna, Western Emerald Belt, Boyacá Department  Colombia (06-07/2015)

Specimen size: 3.1 × 1.5 × 0.8 cm = 1.22” × 0.59” × 0.31”

Main crystal size: 3 × 0.8 cm = 1.18” × 0.31”