interesting fossil plesiosurus bone,partially fossilized in pyrite; clear structure of the bone visible in this polished on both side cabochon. This fossil is from the middle Jurassic period, dated about 150 million years ago and comes from Tatarstan Region, Russia. Several natural cavities are visible.
Size: 53.5x30.4x3.3 mm.
Weight: 45.16 ct.