Chrysoberyl – Santa Teresa, Espirito Santo, Brazil
 Former collection of Dr. Walter Kühnel via C. Weise, 1977
 These chrysoberyl triplets are a time-honored classic and are still considered by many to be the most beautiful textbook crystals of this type. The cyclic twinning and the lustrous, gem-like yellow-green color make this impressive mineral sought after worldwide.
 Old material, probably from the 1940s or 1950s.