Crystals
Quartz with inclusions
Quartz with inclusions • SiO₂ enclosing minerals, fluids, gases, cavities, fractures, and earlier growth surfaces Solid inclusions • rutile, tourmaline, chlorite, hematite, pyrite, titanium oxides Scenic structures • gardens, mosses,...
Quartz with inclusions
Quartz with inclusions • SiO₂ enclosing minerals, fluids, gases, cavities, fractures, and earlier growth surfaces Solid inclusions • rutile, tourmaline, chlorite, hematite, pyrite, titanium oxides Scenic structures • gardens, mosses,...
Oolite
Oolite • sedimentary rock dominated by coated grains called ooids Ooids • commonly about 0.25–2 mm across Classic composition • calcite or aragonite cortices and carbonate cement Related rocks •...
Oolite
Oolite • sedimentary rock dominated by coated grains called ooids Ooids • commonly about 0.25–2 mm across Classic composition • calcite or aragonite cortices and carbonate cement Related rocks •...
Nuummite
Nuummite • trade and rock name for iridescent orthoamphibole material associated especially with the Nuuk district of southwestern Greenland Principal optical minerals • anthophyllite and gedrite Common flashes • gold,...
Nuummite
Nuummite • trade and rock name for iridescent orthoamphibole material associated especially with the Nuuk district of southwestern Greenland Principal optical minerals • anthophyllite and gedrite Common flashes • gold,...
Moldavite
Moldavite • green Central European tektite formed from terrestrial material during the Ries impact Impact event • Nördlinger Ries, southern Germany Age • approximately 14.8 million years Strewn field •...
Moldavite
Moldavite • green Central European tektite formed from terrestrial material during the Ries impact Impact event • Nördlinger Ries, southern Germany Age • approximately 14.8 million years Strewn field •...
Fulgurite
Fulgurite • natural material fused, melted, or vitrified along a lightning-current path Not a mineral species • commonly a glass-rich geological object Silica-rich examples may contain lechatelierite Classic form: branching...
Fulgurite
Fulgurite • natural material fused, melted, or vitrified along a lightning-current path Not a mineral species • commonly a glass-rich geological object Silica-rich examples may contain lechatelierite Classic form: branching...
Hessonite
Grossular garnet variety Ca3Al2(SiO4)3 Isometric crystal system Mohs approximately 6.5–7 Cinnamon stone Hessonite Garnet: Cinnamon Color, Treacle Light, and the Warm Side of Grossular Hessonite is the apricot-to-cognac variety of...
Hessonite
Grossular garnet variety Ca3Al2(SiO4)3 Isometric crystal system Mohs approximately 6.5–7 Cinnamon stone Hessonite Garnet: Cinnamon Color, Treacle Light, and the Warm Side of Grossular Hessonite is the apricot-to-cognac variety of...