Formula: Na₂Ti₂(Si₂O₆)O₃

Species:

Colour: Pale purple-brown, pale pink to mauve, brown to black

Lustre: Adamantine, Vitreous, Sub-Metallic, Dull

Hardness: 6

Specific Gravity: 3.42 – 3.45

Crystal System: Orthorhombic

Name: For Johannes Theodor Lorenzen (1855-1884), Danish mineralogist

Type Locality: Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq – Greenland