Μια συλλογή από πέντε ορυκτά δείγματα σε μαύρο φόντο. Ανωτερα αριστερά βρίσκεται ο πυρίτης (FeS? ), γνωστός για τη μεταλλική του λά. A collection of five mineral specimens on a black background. Top left is pyrite (FeS? ), known for its metallic luster and brassy-yellow hue. Top right shows a piece of black hematite (Fe? O? ), with a shiny, metallic appearance. Center is a banded jasper, displaying layers of orange and black. Bottom left is a mineral formation of orange-hued calcite (CaCO? ) with a rough texture. Bottom right features a cluster of purple amethyst crystals (SiO? ) with a vibrant color and pointed terminations.