60
    • P531108
    • Corsehill quarry.
    • P512489
    • Achscrabster Quarry (New), Thurso,...
    • P512500
    • Achscrabster Quarry (New), Thurso. View...
    • P512504
    • Achscrabster Quarry (New), Thurso. View...
    • P512561
    • Achscrabster Quarry (New), Thurso....
    • P1022475
    • Photomicrograph of a sample of Alves...
    • P1022476
    • Photomicrograph of a sample of Alves...
    • P1022477
    • Photomicrograph of a sample of...
    • P1022478
    • Photomicrograph of a sample of...
    • P1022479
    • Photomicrograph of a sample of Ballagan...
    • P1022480
    • Photomicrograph of a sample of Ballagan...
    • P1022481
    • Photomicrograph of a sample of Ballagan...
    • P1022482
    • Photomicrograph of a sample of Ballagan...
    • P1022483
    • Photomicrograph of a sample of Ballagan...
    • P1022484
    • Photomicrograph of a sample of Ballagan...
    • P1022485
    • Photomicrograph of a sample of Ballagan...
    • P1022486
    • Photomicrograph of a sample of Ballagan...
    • P1022487
    • Photomicrograph of a sample of Ballagan...
    • P1022488
    • Photomicrograph of a sample of Ballagan...
    • P1022489
    • Photomicrograph of a sample of Ballagan...
    • P1022490
    • Photomicrograph of a sample of Ballagan...
    • P1022491
    • Photomicrograph of a sample of Ballagan...
    • P1022492
    • Photomicrograph of a sample of Ballagan...
    • P1022493
    • Photomicrograph of a sample of...
    • P1022494
    • Photomicrograph of a sample of...
    • P1022495
    • Photomicrograph of a sample of...
    • P1022496
    • Photomicrograph of a sample of...
    • P1022497
    • Photomicrograph of a sample of...
    • P1022498
    • Photomicrograph of a sample of...
    • P1022499
    • Photomicrograph of a sample of Bressay...
    • P1022500
    • Photomicrograph of a sample of Bressay...
    • P1022501
    • Photomicrograph of a sample of Burghead...
    • P1022502
    • Photomicrograph of a sample of Burghead...
    • P1022503
    • Photomicrograph of a sample of...
    • P1022504
    • Photomicrograph of a sample of...
    • P1022505
    • Photomicrograph of a sample of Calders...
    • P1022506
    • Photomicrograph of a sample of Calders...
    • P1022507
    • Photomicrograph of a sample of Calders...
    • P1022508
    • Photomicrograph of a sample of Calders...
    • P1022509
    • Photomicrograph of a sample of Calders...
    • P1022510
    • Photomicrograph of a sample of Calders...
    • P1022511
    • Photomicrograph of a sample of Clyde...
    • P1022512
    • Photomicrograph of a sample of Clyde...
    • P1022513
    • Photomicrograph of a sample of...
    • P1022514
    • Photomicrograph of a sample of...
    • P1022515
    • Photomicrograph of a sample of...
    • P1022516
    • Photomicrograph of a sample of...
    • P1022517
    • Photomicrograph of a sample of...
    • P1022518
    • Photomicrograph of a sample of...
    • P1022519
    • Photomicrograph of a sample of...
    • P1022520
    • Photomicrograph of a sample of...
    • P1022521
    • Photomicrograph of a sample of...
    • P1022522
    • Photomicrograph of a sample of...
    • P1022523
    • Photomicrograph of a sample of Corrie...
    • P1022524
    • Photomicrograph of a sample of Corrie...
    • P1022525
    • Photomicrograph of a sample of Dundee...
    • P1022526
    • Photomicrograph of a sample of Dundee...
    • P1022527
    • Photomicrograph of a sample of Dundee...
    • P1022528
    • Photomicrograph of a sample of Dundee...
    • P1022529
    • Photomicrograph of a sample of Dundee...