Seriatopora hystrix is a species of colonial stony coral in the family Pocilloporidae. It forms a bushy clump and is commonly known as thin birds n...

Gebel Kamil is a meteorite that struck Egypt approximately 5 millennia ago, resulting in a crater encircled by thousands of iron shrapnel with a co...

Gebel Kamil is a meteorite that struck Egypt approximately 5 millennia ago, resulting in a crater encircled by thousands of iron shrapnel with a co...

Gebel Kamil is a meteorite that struck Egypt approximately 5 millennia ago, resulting in a crater encircled by thousands of iron shrapnel with a co...

Mosasaurs probably evolved from an extinct group of aquatic lizards known as aigialosaurs in the Early Cretaceous Period (73-65 million years ago)....

Mosasaurs probably evolved from an extinct group of aquatic lizards known as aigialosaurs in the Early Cretaceous Period (73-65 million years ago)....

An aesthetic specimen of a 5" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glassy...

An aesthetic specimen of a 6" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glassy...

An aesthetic specimen of a 7" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glassy...

An aesthetic specimen of a 8" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glassy...

An aesthetic specimen of a 9" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glassy...

An aesthetic specimen of a 11" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 12" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 12" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 10" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 19" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 13" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 15" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 15" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 18" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 12" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...

An aesthetic specimen of a 23" gem transparent gypsum var. selenite crystal on druzy matrix. The specimen has top quality transparency with a glass...