Nuummite

Nuummite (means "derived from Nuuk" in Greenlandic) was first found near Nuuk, Greenland, in the early 1980's. Even though Nuummite is a recent discovery, it was formed more than three billion years ago (yes, billion!). It is also known as the oldest rock on earth.

Nuummite is the trade name for a rare black gemstone with iridescent flecks. It is a metamorphic rock (formed from existing rock). Nuummite is mainly made up of Anthophyllite and Gedrite, with small amounts of Chalcopyrite, Pyrite and Pyrrhotine.

Nuummite's iridescent is due to it's lamellar structures (micro structures) are composed of fine, alternating fibrous layers of different materials in the form of lamellae.

Alternate Spellings: Nuumit, Nuumite, Nuummit
Color: Light-grey to almost black with iridescent yellow, blue, red, green, gold and violet flecks
Origins: Mainly Greenland but some has also been found in Finland.