The outer surface is almost entirely covered with petrified bark - a great rarity as the softer material rarely survives
Diplomystus dentatus and Priscacara sp
einer Epoche außergewöhnlicher Biodiversität im westlichen Nordamerika
is prized for its purple color
das ein robustes Skelett sowie die Merkmale eines urzeitlichen Temnospondylen zeigt
SOLD | Große Rote Jaspiskugel | Südafrika Triceratops-wirbel The outer surface is almostOrigin: South Africa Size: Diameter 21cm Description: Spherical, polished to bring out rich red and gold tones. Cut in Idar Oberstein, Germany. Additional information: Jasper, opaque, fine grained or dense variety of the quartz mineral chert, which presents various colors. Mainly brick red to brown red, it owes its color to added hematite; but when mixed with clay the color is yellowish white or gray, or with goethite brown or yellow. Jasper, long