Massive, without cleavage.
G = 5·04. H = 41⁄2-5. Brownish black; opaque.
Nohl, near Kongelf, Sweden.
Oerstedite.
A variety of [Zircon] (q.v.), poor in SiO₂. ZrO₂ = 69%.
Tetragonal; angles exactly those of Zircon.
G = 3·629. H = 51⁄2. Reddish-brown; adamantine lustre.
Arendal, Norway.
Orangite.
ThSiO₄, usually with Fe, Ca, H₂O in traces. ThO₂ = 71·2-73·8%.