£1.10 – £2.00
Trachyte, a common igneous rock composed of various minerals including quartz, feldpsars, micas and olivine, rock specimens come from East Lothian, Scotland and are available in optional sizes, supplied in a card tray with a label.
Trachyte is an igneous rock produced by volcanic activity, overall it is an fine grained rock with little to almost no larger crystals within its structure. The rock can be easily be told apart form our other trachyte variant, sanadine trachyte, which, while all trachytes contain sanadine feldspar, this particular specimens fine grained texture makes it near impossible to see, even with aid of a magnifying lens, where as our specimens of sandine trachyte, one can easily see the sanidine crystals even with the naked eye. These particular rock specimens come from the Pencraig sill in the Markle Mains Quarry which is located in East Linton, Scotland, they are a brown - reddish colour and are available in various sizes, supplied in a card tray with an information label.