
Lapis Lazuli Usage: Cabochons as ring stones and for brooches, pendants, spheres for stone necklaces, also often as handicraft items. Treatment: Non-beautiful blue lapis lazuli is frequently colored by placing it in dye solutions. However, this can be easily identified by rubbing with alcohol or acetone; dyed stones color the cotton pad blue. Differentiation: The essentially always present inclusions of pyrite and calcite are highly characteristic. They are always absent in other dyed stones.	Staurolite Morphology: Prismatic to tabular crystals, often cruciform twins (right-angled or intergrown at about 60°), always anhedral. Origin and occurrence: Anhedral in mica schists and gneisses. Accessory minerals: Quartz, mica, kyanite. Similar minerals: Tourmaline always clearly exhibits trigonal sym-metry and does not form cruciform twins; kyanite is never dark brown; garnet has a distinct cubic crystal form; unlike staurolite, andalusite has an almost square cross-section.	Gratonite Morphology: Prismatic crystals with characteristic trigonal end faces, radial aggregates, uneven. Origin and occurrence: In hydrothermal deposits, in subvolcanic tin-silver deposits. Accessory minerals: Jordanite, cerussite, pyrite, enargite, tinstone, argentite. Similar minerals: Its characteristic crystal formmakes gratonite unmistakable; tourmaline does not have a metallic luster; pris-matic tinstone is tetragonal.


Chrysocolla Use: Cabochons as ring stones and for brooches, pendants, spheres for stone necklaces, also often as handicraft items. Differentiation: The practically always present intergrowths with malachite (green) make the stone very typical and unmistakable in appearance.	Rhodonite Use: Cabochons as ring stones and for brooches, pendants, spheres for stone necklaces, also often as handicraft items. Differentiation: Due to its color and typical black veining, it is impossible to confuse rhodonite with any other gemstone or semi-precious stone.	Andalusite Use: As ring stones, for pendants. Due to chiastolite’s distinct cru-ciform shape and its occurrence near the pilgrimage site of Santiago de Compostela in Spain, chiastolite pendants were often worn as religious amulets.