JFD177AP1: Many years ago, when specimens from the quarries of the Sierra Norte de Madrid began to be seen (almost always referred to under the generic name of 'Los Gallegos') this quality of specimen still attracted attention. Later, those quarries experienced a splendor that we could hardly imagine, and so this piece now remains as a historical relic of the early days.
Miraculously, I was able to find out that it came specifically from the Navazales II Quarry, rather than having only the generic area name of 'Los Gallegos'
Navazales II Quarries, La Cabrera pluton, Valdemanco - Bustarviejo - Cabanillas de la Sierra - Navalafuente, Comarca Sierra Norte, Community of Madrid  Spain (1998)

Specimen size: 7.4 × 4.2 × 3 cm = 2.91” × 1.65” × 1.18”

Main crystal size: 2 × 0.3 cm = 0.79” × 0.12”