Allargentum-Silver after Dyscrasite" refers to a mineral specimen from the Bouismas Mine in Bou Azer, Morocco, where native silver and allargentum (a silver-antimony mineral) have replaced the original dyscrasite crystals. These specimens are prized for their aesthetic, dendritic formations and lustrous, dark gray to silver colors. Location: The specimens come from the Bouismas Mine in the Bou Azzer district of Morocco. This is part of the Draa-Tafilalet region in the Ouarzazate province. Mineral formation: The allargentum and silver have formed a "pseudomorph," meaning they have taken the outer shape of the original mineral. In this case, the crystals of dyscrasite have been replaced by this new metallic mixture. Appearance: The specimens often feature spectacular, lustrous, and dendritic (branching) growths. The crystals are metallic and range in color from dark gray to silver. Significance: Allargentum is a rare mineral, and these Moroccan finds from 2015 are considered some of the best examples of the species, particularly those with sharp, well-defined crystals. Weight: 2,29g Size: 17,1mm x 13,4mm x 11,2mm All of our minerals come with a Certificate of Authenticity. Every week, the issued Certificates of Authenticity are updated in our database verification system on our website. If you find that your certificate has not yet been updated, please contact us and we will update it immediately. Display box not included. IMPORTANT SHIPPING INFORMATION: All items with value between 15 and 800 Euros are now impossible to get them shipped to USA due to the new negulataions of the USA customs administration. Sorry for the inconveniences.