This 3-dimensional, very transparent cluster of parallel-growth amethyst crystals sits on a thin crust of matrix. The lustrous and gemmy crystals are subtly graded in color from an intense purple to lavender and to clear tips. The largest crystal is 8.3 cm in length. Lovely cluster, this is typicla of older material from the locality but pieces can seldom be found today in such fine condition. luster, and gemminess here, are superb! This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Comes with custom lucite base already made for the specimen.