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Its characteristic longitudinal stretch marks as well as its transversal growth lines can be seen
Impressive specimen of the genus Cyphaspis
Plagioclase crystals appear in interstitial position with olivine in the chondrules
glued or fabricated
The rostral barbs of this enormous sawfish are relatively common in the Cretaceous quarries in the South of Morocco
07306 - Top Rare 2.67 Inch Fulgurite ("Petrified lightning") Collected in Algeria Turtle Its characteristic longitudinal stretch marksFulgurites are natural tubes, clumps, or masses of sintered, vitrified, and or fused soil, sand, rock, organic debris and other sediments that can form when lightning discharges into ground. They can therefore be referred to as petrified lightning. They are classified as a variety of the mineraloid lechatelierite, although their absolute chemical composition is dependent on the physical and chemical properties of the usually granular crystalline