He graciously agreed to share, and says that the photo on the left "is of a pyrope garnet from the classical locality Case Ramello in the Dora-Maira massif. This is one of the bigger ones (see watch for scale), but there are even bigger garnets there. The slight change in color comes from a decrease in Fe from core to rim. The second garnet is smaller, ca 4 cm in diameter coexisting with large phengite and sugary quartz.”
For contrast, the below photo is of a thin section of the Tasmanian whiteschist; the largest garnet in this photo (upper left corner) is 4 mm wide.
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