From Edong Mining District, Daye, Hubei, China   Large cluster of scalenohedral calcite with a secondary coating of lustrous iridescent metallic chalcopyrite crystals on the surfaces. Bright and lively specimen with a scintillating surface.   3.20 lbs, 6.5'' x 4'' x 4.75''

Carcharodontosaurus (Dinosaur) tooth in a glass display box From Tegana Formation, North Africa. Cretaceous Age 65 million years Carcharodontosaurus is one of the longest and heaviest known carnivorous dinosaurs, with various scientists proposing length estimates ranging between 12 and 13 m (39-43.5 ft) and weight estimates between 6 and 15...

Carcharodontosaurus (Dinosaur) tooth in a glass display box From Tegana Formation, North Africa. Cretaceous Age 65 million years Carcharodontosaurus is one of the longest and heaviest known carnivorous dinosaurs, with various scientists proposing length estimates ranging between 12 and 13 m (39-43.5 ft) and weight estimates between 6 and 15...

From Tegana Formation, North Africa Cretaceous Age 65 million years Carcharodontosaurus is one of the longest and heaviest known carnivorous dinosaurs, with various scientists proposing length estimates ranging between 12 and 13 m (39-43.5 ft) and weight estimates between 6 and 15 metric tons.This tooth is from a large Carcharodontosaurus...

From Tegana Formation, North Africa Cretaceous Age 65 million years Carcharodontosaurus is one of the longest and heaviest known carnivorous dinosaurs, with various scientists proposing length estimates ranging between 12 and 13 m (39-43.5 ft) and weight estimates between 6 and 15 metric tons.This tooth is from a large Carcharodontosaurus...

From Quincy Mine, Hancock, Keweenaw Peninsula Copper District, Houghton County, MichiganLustrous translucent parallel scalenohedral calcite crystals with metallic copper inclusions on matrix. The copper inclusions are visible throughout the crystals.*Custom Lucite base shown included with purchase1.25 lbs, 4'' x 3.5'' x 2.5''

From Dalnegorsk, Primorskiy Kray, Russia Highly lustrous gem transparent crystals of colorless fluorite on matrix with small prismatic quartz crystals embedded with metallic galena crystals along side bladed rhombic crystals of calcite. The fluorite crystals show a combination of various formation from tetrahexahedral to octahedral and  dodecahedral.   2 lbs,...

Cluster of genuine electric-green fluorite crystals on Matrix. This rare African specimen displays large gemmy crystals, with top luster. A fine collector piece.    3.6 lbs, 6.5 x 4 x 3.5 inches

Cluster of genuine electric-green fluorite crystals on Matrix. This rare African specimen displays large gemmy crystals, with top luster. A fine collector piece.    4.8 lbs, 5 x 2.25 x 5.5 inches

Cluster of genuine electric-green fluorite crystals on Matrix. This rare African specimen displays large gemmy crystals, with top luster. A fine collector piece.    6.4 lbs, 6.5 x 4 x 5 inches

Cluster of genuine electric-green fluorite crystals on Matrix. This rare African specimen displays large gemmy crystals, with top luster. A fine collector piece.    7 lbs, 9 x 3 x 6.5 inches

Cluster of genuine electric-green fluorite crystals on Matrix. This rare African specimen displays large gemmy crystals, with top luster. A fine collector piece.    8.8 lbs, 6 x 4 x 6.5 inches

This is a slice of fossilized dinosaur bone with one side polished to a mirror finish. This specimen is a fossilized dinosaur bone in which the original fossil material has been replaced by silica, exposing the inner cell structure of the bone. The impurities within the silica is how this...

This is a slice of fossilized dinosaur bone with one side polished to a mirror finish. This specimen is a fossilized dinosaur bone in which the original fossil material has been replaced by silica, exposing the inner cell structure of the bone. The impurities within the silica is how this...

This is a slice of fossilized dinosaur bone with one side polished to a mirror finish. This specimen is a fossilized dinosaur bone in which the original fossil material has been replaced by silica, exposing the inner cell structure of the bone. The impurities within the silica is how this...

From Dalnegorsk, Primorskiy Kray, Russia   Highly lustrous stacked cluster of translucent manganese rich faint pink calcite crystals. The calcite crystals are scalenohedral formation with double terminations and striated crystal faces.   1.80 lbs, 5.5'' x 4'' x 3''

Spinosaurus (Dinosaur) tooth in a glass display box From Tegana Formation, North Africa. Cretaceous Age 65 million years Carcharodontosaurus is one of the longest and heaviest known carnivorous dinosaurs, with various scientists proposing length estimates ranging between 12 and 13 m (39-43.5 ft) and weight estimates between 6 and 15...

Here is a large vertebrae from the massive Spinosaurus maroccanus theropod dinosaur. It comes from From Baharija Formation, South of Taouz, Kem-kem Basin, Morocco.Spinosaurus (meaning "spine lizard") is a genus of theropod dinosaur that lived in what now is North Africa, during the lower Albian to lower Cenomanian stages of...

From Nasik District, Maharashtra, India   Penetrating twinned crystals of transparent golden yellow calcite with silky luster faces and sharp terminations. The twin orientation is well defined and visible throught the termination faces.  2 lbs, 5 x 4 x 3.5 inches