This lot consists of natural Quartz crystals containing petroleum (hydrocarbon) fluid inclusions, commonly known as Petroleum Diamond Quartz. The specimens show clear to translucent quartz with internal petroleum inclusions; in several pieces, a visible movable petroleum drop can be observed when the crystals are gently tilted or warmed. All specimens are natural, unpolished, and untreated, preserving their original crystal form and internal features. Natural growth marks, internal inclusions, and minor surface irregularities are present and confirm authenticity. Quantity & Weight Total specimens: 7 Individual weights: 8 g, 4 g, 3 g, 5 g, 2 g, 1 g, 3 g Total combined weight: approx. 26 grams