Hans-Jürgen Henn and Alfred Zimmermann, “Heliodor Tree Frog”, Date Unknown, Heliodor and Gold, 15 cm in Height, Henn Gems
Designed by Hans-Jürgen Henn and Alfred Zimmermann, the “Heliodor Tree Frog” was intricately fashioned by master gemstone carver Alfred Zimmermann. The frog and its perch was carved from richly colored Ukrainian heliodor, a member of the beryl family known for its hexagonal crystals, vitreous luster, and range of color. The amphibian’s gemstone perch is set on a base of eighteen-carat yellow gold; the combined materials allude to the various textures of an exotic tree trunk in the wild.
One of the most renowned lapidary artists of the last several decades, Alfred Zimmerman is a member of an Idar-Oberstein family of gemstone carvers. Originally an apprentice of Gerd Dreher, a fourth-generation stone carver, Alfred Zimmerman is also known for working in the “Fabergé” tradition. Zimmerman’s frequent subjects are either soldiers or peasants in folkloric attire but he is well known for animal carvings of transparent crystalline minerals. Zimmermann has recently retired after a long career of finely executed sculptures.
The third-generation of the Henn family in the gemstone trade, Hans-Jürgen Henn has over fifty years of experience in the trade. From an early age, he combined his passion for precious stones with mountaineering, during which he was always searching for the rare and undiscovered. Henn, the first to coin the expression Kashmir Peridot, had the passion and foresight to preserve the Dom Pedro Aquamarine as a single, dramatic stone. This stone, the largest aquamarine ever cut, was fashioned by Bernd Munsteiner, and gifted to the Smithsonian Institute in 2011.
For information on exhibitions, jewelry, and objects of art, the Henn Gemstone website is located at: https://henngems.de/home/