NA90AL5: Two cubic Fluorite crystals beveled by the rhombododecahedron, very clean and transparent, bright, and with geometric color zoning.
The specimen comes from the Miguel David Martínez collection (No. 526)

Fluorites from this locality formed in low-temperature hydrothermal veins hosted in Mesozoic sedimentary rocks, related to the circulation of fluor-rich fluids through fractures. These fluids favored the crystallization of Fluorite in cavities and open spaces, giving rise to crystals of great transparency and exceptional color.
La Viesca Mine, La Collada mining area, Huergo, Siero, Comarca Oviedo, Principality of Asturias (Asturias)  Spain (2016)

Specimen size: 6 × 6 × 4.2 cm = 2.36” × 2.36” × 1.65”

Main crystal size: 4 × 3.5 cm = 1.57” × 1.38”