St-Bt-Grt gneiss
Hill of Three Stones, Fetteresso Forest
St zone
St → white Mca
Grt-Hem-Tur schist
Burn of Course Bauld, Kincardineshire
Grt zone
Gr-Ms schist
Allt Linne a Bhuirein, Gleann Fearnach, Perthshire
Pre-Chl zone
Grt-Act-Bt schist
Crannoch (near), Allt Fearnach, Glen Fernait
Grt zone
Sil-Ilm-Tur rock
Tilbouries, Kincardineshire
Sil zone
Fibrolite
Needles inside Tur
With sensitive tint
(The needles are length slow, with straight extinction)
Sil-Mca gneiss
Findon (N), Kincardineshire
Sil zone
Fibrolite and white Mca
With sensitive tint
Length slow (Sil)
Schist or gneiss
Craig Lair, Perthshire
Grt zone
Hexagonal outline in Pl
Sil-Grt-Bt-Perthite gneiss
Balnacraig, Deeside
Sil zone
Grt, Sil, & Bt
White Mca alteration
High-relief Sil mosaic & Grt fragments
Prismatic Sil
Grt-Crd-Bt-Qz hornfels
Sparcraigs, Belhelvie
Grt zone
Pale yellow pleochroic haloes (Crd)
Imperfect polysynthetic twins
Qz-rich
Needles on Grt tip
Crd-Ms schist
Slains Castle, Aberdeen (coast N of)
Crd zone
Sector trilling
Qz-Ms-Chl phyllite with Bt
Pass of Brander Rd, E of Allt Cruachan, Argyll
Sericite schist
(In Erim [?] Quartzite) S side of Loch Gair, Loch Fyne
Pre-Chl zone
Tip of a Qz lens
Calc-Bt schist
Brenfield Bay, S of Ardrishaig
Bt zone
Calc-Sericite-(Bt) schist
1 m SW of St Catherine's, Loch Fyne
Bt zone
Strath Tummel road, 3 m above Garry Br.
Grt zone
Lamellar twinned grain with Qz inclusions
Ky-Grt-Mca schist
Glen Fernait district, Perthshire
Ky or Sil zone
(Like a little meteorite; grains beyond the edge of the section)
Yellow tint NE of centre
Sensitive tint (length slow)
A grain of similar relief to the neighbouring Grt
Length slow; somewhat mottled birefringence might indicate Ep
Somewhat anomalous colours in extinction
Sensitive tint (length slow in centre)
(Video)
(Video)
St-Ky-Grt-Mca schist
In River Tay, Grandtully
St zone (at least)
Three zones within Tur
With sensitive tint
St inclusions within Grt
Rt in the bottom right
Alteration at edges
St in Grt
Qz-Pl-Bt-Ms-Ky-St schist
Burn of Braco
Ky zone
St twin
With sensitive tint
With sensitive tint
Calc-Chl-Ab schist
Burn W of Hotel, Dalmally
Chl zone
Grt-iferous and graphitic Mca schist
Blair Atholl
Grt zone
Grt-iferous Mca schist
Near head of Kirkton Burn, Balquhidder
Grt zone
Grt → Chl
Grt-Bt-Ms schist
Coast N of Portlethen Bay, S of Aberdeen
Grt zone
And-Sil-St-Grt-Mca schist
Mill of Kinnairdy
Sil zone
Fibrolite
(The white grain to the east is length fast with inclined extinction)
With sensitive tint
Ms-Bt-Augen gneiss
Railway WNW of Grantown
Grt zone
Symplectites within Pl within Kfs
Pinched-out twins
Perthitic texture in Kfs (?)
Dotty centres
Straight extinction wrt the cleavage
Grt-iferous Mca schist
Roadside ½ m E of Glen Spean Lodge
Grt zone
With sensitive tint
(Video)
Ms-Bt-Augen gneiss
NE of cemetery, 1 m NE of Keith
High relief accessories
The accessories have very high birefringence
High relief grain in centre
Low first-order grey birefringence
Very good cleavage in the centre