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corundum, var. sapphire; cut stone, with offcut fragments and enclosing megacrystic monchiquite with unknown rod-like mineral in pyroxene 1.12 ct

Uasaig River, Carishader, Loch Roag, Lewis, Western Isles, Scotland loose, [from dyke], [Tertiary] MANU COMBE, Ian 1998 Scotland A mixed-cut rectangular stone with rounded corners. Slight variation in colour from one end to the other. Some offcut fragments polished to show pleochroism.