21577 - Top Huge Slender Grass Green Epidote Crystals on Matrix Imilchil Mine Morocco Neltneria A New Pterosaur (Pterodactyloidea: Azhdarchidae)

A New Pterosaur (Pterodactyloidea: Azhdarchidae) fromthe Upper Cretaceous of Morocco

• Ordovician of Argentina

It is a magnificent and impressive piece

It has only been excavated from the matrix in order to make it visible

21577 - Top Huge Slender Grass Green Epidote Crystals on Matrix Imilchil Mine Morocco Neltneria A New Pterosaur (Pterodactyloidea: Azhdarchidae)Well developed crystals of epidote, Ca2Al2(Fe3+; Al)(SiO4)(Si2O7)O(OH), crystallizing in the monoclinic system, are of frequent occurrence: they are commonly prismatic in habit, the direction of elongation being perpendicular to the single plane of symmetry. The faces are often deeply striated and crystals are often twinned. Many of the characters of the mineral vary with the amount of iron present for instance, the color, the optical constants, and