From Huanggang Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia, China Several intersecting doubly terminated quartz crystals colored green by inclusi...

From Deveti Septemvri Mine, Madan District, Rhodope Mountains, Bulgariaina Rare large specimen of crystals of arsenopyrite with quartz. The arseno...

Lustrous translucent red-brown sphalerite crystals in an elongated cluster perched on a thin slab of gray matrix coated with quartz microcrystals. ...

From Elk Creek, Meade County, South Dakota Large, museum-quality, lustrous transparent deep golden calcite on matrix. Double terminated scalenohedr...

Pristine cluster of colorless apophyllite crystals. The crystals vary from milky white to water-clear at the terminations. this is a stalactitic fo...

From Diamantina, Minas Gerais, Brazil Large transparent colorless quartz crystals with surfaces composed of many smaller parallel crystal faces. In...

From Xuebaoding Mountain near Pingwu, Sichuan Province, ChinaTranslucent orange scheelite crystals on plate of limonite-stained muscovite mica crys...

From Wushan Spessartine Mine, Tongbei-Yunling District, Fujian Province, China Large specimen of lustrous transparent deep red spessartine garnet c...

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...

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

Museum quality, 5" tall stone containing many small ammonite fossils. The ammonites are of the species Promicroceras marstonense and are Lower Jura...

Large, natural cluster of trilobite in its original fossil matrix. The Asaphid trilobites include some of the most extreme trilobite adaptations kn...

Large, natural cluster of trilobite in its original fossil matrix. The Asaphid trilobites include some of the most extreme trilobite adaptations kn...

From Stanley Butte, San Carlos Indian Reservation, Graham County, Arizona Well crystallized, classic cluster of greenish-brown andradite garnet cry...

From Katanga (Shaba) Province, Democratic Republic of the Congo (Zaire)Lustrous transparent green acicular malachite crystals lining cavities on Cu...

Lustrous cluster of rhombohedral formation of calcite with heavy inclusions of brick red hematite. The calcite crystal faces are fully terminated w...

From Kunar, Afghanistan Large single crystal of transparent sherry colored Topaz with sharp complex basal pinacoid terminations. Crystal is well fo...

From Ouro Preto, Minas Gerais, Brazil Huge single crystal of sherry-colored gem-grade topaz with complex etched surface on the flat termination...

From Chhaqpu, Braldu Valley, Skardu District, Gilgit-Baltistan, Pakistan Many interconnected crystals of black schorl tourmaline in  matrix of sta...

From La Grasta Mine, Delia, Caltanissetta Province, Sicily, Italy Colorless translucent prismatic celestine crystals with lustrous crystal faces, o...

From Jebel Ouichane, Sagangane, Nador Province, L'Oriental Region, Morocco.Lustrous transparent blue tapered barite crystals in a group of parallel...

From Kelly Mine, Magdalena District, Socorro County, New Mexico Beautiful specimen of lilac-purple botryoidal smithsonite in rounded, botryoidal sh...