Quartz, variety agate - blue-grey, pale grey fortification banded with pink zoning - from Ardownie Quarry, Monifieth, Angus

Quartz, variety agate - polished slab - dark blue-grey and pale grey fortification banded with a flash of reddish-brown and dark green moss surround - Ardownie Quarry, Monifieth, Angus

Quartz, variety agate - dark translucent blue zones with blue-grey banding, some brown zoning and a large common quartz infill - one face polished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - dark translucent blue-grey with pale blue-grey banding, two tubes of escape and a common quartz infill - one face polished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - blue-grey and pink banded - with some common quartz infill - polished on two faces - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - a dark blue-grey and grey fortification banded slice - polished and mounted as a silver brooch - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - blue-grey banded with pink and brown zoning and a common quartz infill - one face polished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - blue-grey and grey fortification banded with some dark reddish-brown zones - one face polished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - a slice - scenic - colourless translucent with green celadonite moss, purple-red zoning and hematchate ovoids - one face polished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - blue-grey and grey banded and zoned - unpolished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - dark translucent blue-grey and grey fortification banded - one face polished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - dark translucent blue-grey and grey fortification banded - unpolished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - pale blue-grey and grey fortification banded and zoned with ovoids - unpolished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - pale blue-grey banded with a large common quartz infill - one face polished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - blue-grey, pale grey and dark grey fortification banded and zoned - one face polished - Agate book, F.52(3), p.25 - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus

Quartz, variety agate - blue-grey fortification banded with pink bands and small brown zones - one face polished - from Blue Hole, Usan, Scurdie Ness, Montrose, Angus