Chocolate' flint : 3D documentation

First charactristics of chocolate flint containing an attempt to determine distinct features of flint "Zele" type from Wierzbica mine was given by R. Schild (1971). There were three levels of occurrence of flint concretions at the Wierzbica "Zele" site. They occurr in two types – as large plates and as nodule-like concretions. Raw material extracted at Wierzbica "Zele" site differs from other similar varieties of chocolate flint by weaker lustre and the occurrence of clear demarcation between black and brown chocolate colour in the flint mass of some part of concretionsR. Schild（1971年）首次对巧克力燧石（chocolate flint）的相关特征展开研究，其尝试区分产自维尔日比采（Wierzbica）矿区的"泽莱（Zele）"型燧石的独特属性。维尔日比采"泽莱"矿点的燧石结核存在三类赋存层位，且以两种产出形态存在：大型板状燧石与结核状燧石。从该矿点提取的原料，相较于其他同类巧克力燧石品种，其光泽较弱，且部分结核的燧石基质中可见黑色与棕褐色巧克力色调间清晰的分界。