Hydroxyapatite – Oksøyekollen, Snarum, Modum, Norway
 This 3.7 cm hydroxyapatite crystal is particularly sharp-edged and lustrous. A small amount of hornblende has grown into the crystal. Hornblende is the typical accompanying mineral for this extremely rare apatite-group mineral, which is found only in this form in Oksøyekollen.
 Rare collector's item with crystal model-like structure.