One of the first specimens I have ever collected; massive and tiny crystals of azurite with green malachite from one of the small Gotthalfske coppermines situated north-west of Alnsjøen, Grorud, Oslo, Norway. In the Årvoll – Alnsjøen – Huken area there are about 10 – 15 small mines and prospects. I collected the specimen around 1965. My ...
© OT. Ljøstad