Aragonite
Aragonite is a calcium carbonate mineral that shares its composition with calcite but differs in its crystal structure, resulting in distinctive forms and habits. It develops under less common geological conditions than calcite, making it comparatively rarer. Although most aragonite specimens appear white or colorless, they can also display attractive hues of blue, green, red, or violet when trace elements are present. Collectors often value its branching, coral-like, or spherical growths, which create highly decorative specimens. The examples listed here are primarily from Afghanistan, admired for their vivid coloration and strong visual appeal. Other well-known sources include China, particularly Wenshan, where copper inclusions impart delicate to intense blue tones that enhance the aesthetic charm of the stone. With its scarcity, varied color palette, and unusual crystal habits, aragonite holds both scientific significance and artistic beauty, making it a distinctive addition to any fine mineral collection.