Large pyrope crystals containing gem-quality portions have been collected since the early 1990s from the Dora Maira Massif, Western Alps, Italy. These crystals have yielded pale purple to purplish pink gemstones typically up to 1 ct. The chemical composition and physical properties compare favorably to those reported for near-end-member pyrope. Absorption spectra suggest that the color is related to Fe2+ and Mn2+. The pyrope formed in a mica schist-quartzite layer within Paleozoic basement rocks that underwent an Alpine high-pressure/low-temperature metamorphic event. The deposit appears extensive, but future production undoubtedly will be limited due to environmental restraints. Currently about 100 carats per year enter the marketplace.
Large pyrope crystals containing gem-quality portions have been collected since the early 1990s from the Dora Maira Massif, Western Alps, Italy. These crystals have yielded pale purple to purplish pink gemstones typically up to 1 ct. The chemical composition and physical properties compare favorably to those reported for near-end-member pyrope. Absorption spectra suggest that the color is related to Fe2+ and Mn2+. The pyrope formed in a mica schist-quartzite layer within Paleozoic basement rocks that underwent an Alpine high-pressure/low-temperature metamorphic event. The deposit appears extensive, but future production undoubtedly will be limited due to environmental restraints. Currently about 100 carats per year enter the marketplace.
