- Brookite, Albite
- Small Cabinet, 7.0 x 5.4 x 3.4 cm
- Twll Maen Grisial, Fron Olau, Prenteg, Gwynedd (Caernarvonshire), Wales, UK
Lustrous, brown brookite blades to 8 mm are aesthetically scattered or concentrated in a vug and are nicely complimented by lustrous, albite blades on this superb specimen from a classic and historic locale in Wales - Twll Maen Grisial, the Type Locality for brookite. Ex. Phillip Greybill Collection.