Gemologist Martin P. Steinbach has had a lifelong fascination with asterism. This is the property of gems (so-called star stones or asteria) to show a star-like pattern of reflected or refracted light after they have been polished and shaped. This is the first book on this topic, showing the different classes of star stones using a large number of photos.
English - 900 Pages - 23 x 7 x 29,2 cm - 4.3 Kg