James St. John: Corundite (emery rock) (Naxos Emery Deposits, metamorphism in the Eocene & Miocene, 40-50 Ma & 16-20; Naxos Island, Aegean Sea) 1
James St. John: Corundite (emery rock) (Naxos Emery Deposits, metamorphism in the Eocene & Miocene, 40-50 Ma & 16-20; Naxos Island, Aegean Sea) 2
James St. John: Quartz with included actinolite (Serifos Island, Cyclade Islands, Aegean Sea)
James St. John: Argentiferous galena (Laurium Silver Mines, Attica, Greece)
James St. John: Emery (Naxos Emery Deposits, metamorphism in the Eocene & Miocene, 40-50 Ma & 16-20; Naxos Island, Aegean Sea) 1
James St. John: Emery (Naxos Emery Deposits, metamorphism in the Eocene & Miocene, 40-50 Ma & 16-20; Naxos Island, Aegean Sea) 2
James St. John: Emery (Naxos Emery Deposits, metamorphism in the Eocene & Miocene, 40-50 Ma & 16-20; Naxos Island, Aegean Sea) 3
James St. John: Emery (Naxos Emery Deposits, metamorphism in the Eocene & Miocene, 40-50 Ma & 16-20; Naxos Island, Aegean Sea) 4
James St. John: Emery (Naxos Emery Deposits, metamorphism in the Eocene & Miocene, 40-50 Ma & 16-20; Naxos Island, Aegean Sea) 5
James St. John: Emery (Naxos Emery Deposits, metamorphism in the Eocene & Miocene, 40-50 Ma & 16-20; Naxos Island, Aegean Sea) 6
James St. John: "Greek Green Porphyry" (glomeroporphyritic metabasalt) (Tyros Beds, Triassic; near Levetsova, Laconia, Greece) 1
James St. John: "Greek Green Porphyry" (glomeroporphyritic metabasalt) (Tyros Beds, Triassic; near Levetsova, Laconia, Greece) 2