Photograph of the left side of stone roughout (ISAP 10410) from Glenullin, Co. Derry, from the Ulster Museum (UM 1954:147). Macro-ID - Porcellanite. Micro-ID - Porcellanite Ic. Petrology - Blue grey, unevenly lightly fine streaked, very fine mottled. Description - Surface dominat
Roughout | Porcellanite
Image
Photograph of face 2 of stone roughout (ISAP 10410) from Glenullin, Co. Derry, from the Ulster Museum (UM 1954:147). Macro-ID - Porcellanite. Micro-ID - Porcellanite Ic. Petrology - Blue grey, unevenly lightly fine streaked, very fine mottled. Description - Surface dominated by l
Roughout | Porcellanite
Image
Photograph of face 1 of stone roughout (ISAP 10410) from Glenullin, Co. Derry, from the Ulster Museum (UM 1954:147). Macro-ID - Porcellanite. Micro-ID - Porcellanite Ic. Petrology - Blue grey, unevenly lightly fine streaked, very fine mottled. Description - Surface dominated by l
Roughout | Porcellanite
Image
Photograph of polarised thin section of stone roughout (ISAP 10410) from Glenullin, , Co. Derry, from the Ulster Museum (UM 1954:147). Macro-ID - Porcellanite. Micro-ID - Porcellanite Ic. Petrology - Blue grey, unevenly lightly fine streaked, very fine mottled. Description - Surf
Roughout | Porcellanite
Image
Photograph of cross polarised thin section of stone roughout (ISAP 10410) from Glenullin, , Co. Derry, from the Ulster Museum (UM 1954:147). Macro-ID - Porcellanite. Micro-ID - Porcellanite Ic. Petrology - Blue grey, unevenly lightly fine streaked, very fine mottled. Description
Roughout | Porcellanite
Image
Scanned drawing of stone roughout (ISAP 10410) from Glenullin, Co. Derry, from the Ulster Museum (UM 1954:147). Macro-ID - Porcellanite. Micro-ID - Porcellanite Ic. Petrology - Blue grey, unevenly lightly fine streaked, very fine mottled. Description - Surface dominated by large
Roughout | Porcellanite
Image