This group of octahedral cuprite crystals is simply outstanding for the locality! The largest crystal measures 1.0 cm across and the plate is rich and covered with such high-quality crystals on both sides. I am told that these were mined prior to the 1870s and are very rare. The only specimen I had previously seen of this material from the collection of Sir Robert Ferguson (1769-1840) and was considered an incredible rarity at the time we had it in 1998. This is an exceptionally rare specimen from an important old locality! It is impossible to find on the market todya, I would say.