A striking CABINET-SIZED specimen with two sprays of lustrous and bright golden-yellow boltwoodite laths to 2.2 cm from the Swakopmund District of Namibia. Boltwoodite is a rare hydrated potassium uranium silicate. These are very large crystals for the species and this is older material, as the accompanying label says S.W. Africa, not Namibia. 11.3 x 6.4 x 5.6 cm