Chocolate' flint : 3D documentation

First charactristics of chocolate flint containing an attempt to determine distinct features for flint of "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 concretions1971年，R.席尔德（R. Schild）首次对巧克力燧石（chocolate flint）的相关特征展开了系统阐述，其研究旨在明确产自维尔日尼采（Wierzbica）矿区泽莱（Zele）型燧石的专属鉴别特征。在维尔日尼采泽莱矿点，燧石结核的产出共分为三个层级。该矿点的燧石结核存在两种产出形态：大型板状燧石与结核状燧石。产自该矿点的原料，相较于其他同类巧克力燧石品种，具有两处显著差异：其一为光泽偏弱，其二为部分结核的燧石基质中，黑色与棕褐色巧克力色调之间存在清晰的颜色分界。