Syenite

Syenite - a small polished slab - pinkish, coarse-grained, largely composed of alkali feldspar - a with small amount of quartz, plagioclase, hornblende and/or biotite (difficult to distinguish in polished specimen) - original name: Syenites Antiquorum - locality unknown

Syenite

Syenite - a small polished slab - mainly white, crystalline mineral, probably orthoclase, with numerous aggregates of a dark green, euhedral mineral, probably hornblende - locality unknown

Syenite, larvikitic

Larvikitic syenite, polished coarse-grained blue-grey slab almost completely composed of labradorite, trade name 'Larvikite Granite', from Norway