JFD199AP4: Quartz veins crop out on the surface of the ground in the Alkiza area, and although they do not usually have large crystals, they can be clean and lustrous. Among the ones I have seen, I chose this one because of the quality of the crystals, very transparent, and because the crystals are a little more separated from each other than is usual there.
Outcrops of Quartz veins from Alkiza, Anoeta-Alkiza road, Alkiza, Comarca Tolosaldea, Guipúzcoa / Gipuzkoa, Basque Country (Euskadi)  Spain (1992)

Specimen size: 8.2 × 6.6 × 4.8 cm = 3.23” × 2.60” × 1.89”

Main crystal size: 3.9 × 0.6 cm = 1.54” × 0.24”