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Chemical formula NaCaB 5 O 9 8H 2 O Crystalline system triclinic Class borates ...

Chemical formula SiO2 _ Crystalline system trigonal, hexagonal Class oxides ...

Chemical formula Be 3 Al 2 (SiO 3 ) 6 Crystalline system Hexagonal Class silicates ...

Chemical formula Mn 2+ SiO 3 Crystalline System Triclinic Class Silicates ...

Chemical formula Ca 2 (Mg,Fe,Al) 5 (Al,Si) 8 O 22 (OH) 2 Crystalline System Monoclinic ...

Chemical formula (Fe 2+ ,Mg,Zn) 2 Al 9 (Si,Al) 4 O 22 OH 2 Crystalline System Monoclinic ...

Chemical formula Al2SiO5 _ _ _ Crystalline system triclinic Class silicates ...

Species Mosasaurus sp. Geological Period Late Cretaceous ≈ 70 - 66 ma Origin Kem Kem, Taouz, Morocco Si...

Species Heterodont bivalve Geological Period Jurassic ≈ 160-200 ma Origin France Size ...

Species Ammonite Cleoniceras sp. Geological Period Lower Albian Cretaceous ≈ 100.5 ma Origin Mahajanga, Madaga...

Chemical formula NaCa 2 (Si 3 O 8 )(OH) Crystalline system triclinic Class silicat...

Species Strombus Bubonius Geological Period Middle Pleistocene ≈ 0.12 -0.78 ma Origin Erfoud, Moroc...

Presentation Wooden box with 16 compartments and transparent methacrylate sliding lid. informative label Name, Classificati...

Chemical formula Pb 5 Cl(VO 4 ) 3 Crystalline system Hexagonal Class vanadates ...

Fórmula química SiO2 Sistema Cristalino Hexagonal / Trigonal Clase Óxidos Procedencia Brasil Tamaño 2,00-3,00 cm ...

Chemical formula CaCO 3 Crystalline system orthorhombic Class carbonates Origin Va...

Chemical formula (Na,Ca)(Al,Fe,Li)(Al,Mg,Mn) 6 (BO 3 ) 3 (Si 6 O 18 ).(OH,F) 4 Crystalline system trigonal...

Presentation Wooden box with 20 compartments and transparent methacrylate sliding lid. Information label Name, Chemical...

Composición Sílice (SiO₂) fundida, con impurezas del terreno Clase lechatelierita, Vidrio natural Coordenadas varias Proce...

Composición Mezcla de hierro y níquel y cristales translúcidos de olivino de color verde o amarillo. Clase Metálico-rocoso (litos...

Chemical formula SiO 2 •nH 2 O Crystalline System Amorphous Class Silicates - Miner...

This practical wooden display box is ideal for storing and organizing all types of objects, whether minerals, fossils, rocks, shells, jewelry or a...

Chemical formula Ca 2 Al 3 (SiO 4 ) 3 (OH) Crystalline system Rhombic Class Silica...

Rock Class Sedimentary rock Rock Subclass Chemical and Organogenic Origin Olot, Girona Size 2.0-3.0cm...

Chemical formula CaF 2 Crystalline system Cubic, Octahedron, Rhombododecahedron Class ...

Rock Class igneous rock Rock Subclass Volcanic (volcanic glass) Origin Hidalgo, Mexico Size Medium:...

Especie Estromatolito Periodo Geológico  Devónico ≈ 419-359 m.a. Procedencia  Desierto del Sahara, Marruecos Tamaño Mediano: 3,0...

Practical metal magnifying glass with 40x magnification, of scientific quality. The magnifying glass is foldable to protect the glass and is an op...

Rock Class metamorphic rock Rock Subclass contact metamorphism Origin Sar-E-Sang, Afghanistan Size 2.0-...

Species Heliophora Orbicularis Geological Period Pliocene ≈ 5.3 - 1.8 ma Origin Western Sahara , Mauritania ...

Chemical formula SiO2 _ Crystalline system trigonal Class oxides Origin Midelt...

Species Family Araucariaceae Geological Period Oligocene ≈ 23 Ma Origin Sumatra, Indonesia ...

Rock Class igneous rock Rock Subclass Volcanic (volcanic glass) Origin Hidalgo, Mexico Size Medium: ...

Rock Class igneous rock Rock Subclass Volcanic (volcanic glass) Origin Hidalgo, Mexico Size Medium: ...

Chemical formula KAlSi 3 OR 8 Crystalline system Monoclinic/Triclinic Class silicat...

Chemical formula KAlSi 3 OR 8 Crystalline system Monoclinic/Triclinic Class silicat...