Irish Slate

Irish Slate, Lapis Hybernicus Blue SlatePhoto from Wikimedia (US Govt.) Minerological name: Lapis HybernicusA foliated metamorphic rock formed from clay or volcanic-ash sediment. Parts used: Blue-grey slate from Ireland; softer than regular slate Temperature & Taste: Cool, dry. Constituents: Mainly composed of clay-minerals, quartz and mica, including muscovite, often with biotite, chlorite, hematite, pyrite.Less commonly…