Fluorite
Calcium Fluoride (CaF2)
mineral
Category
Mineraloid (Man Made Origin)
Browse mineraloid (man made origin) specimens identified by the Rock Identifier community.
Learn about Mineraloid (Man Made Origin) in the encyclopedia
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Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Fluorite (often called Rainbow Fluorite or Purple-Green Fluorite)
Calcium Fluoride (CaF2)
mineral
Fire Opal (in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)
igneous
Limonite/Ironstone
Limonite (Hydrous ferric oxides), FeO(OH)·nH2O
sedimentary
Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
igneous/sedimentary mixed (Orbicular Jasper)
Anthropogenic Heat Source (Electronic/Industrial Interface)
Thermal IR emission (Electronic infrastructure)
not a rock or mineral
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Diamond
Diamond (C)
mineral
K2 Jasper (K2 Granite)
Azurite-in-Granite
igneous
Diamond
Carbon (C)
gemstone
Sandstone
Arenite
Sedimentary
Emerald
Beryl (Be3Al2Si6O18 with chromium and vanadium impurities)
gemstone
Granite
Intrusive igneous rock
igneous
Granite
Phaneritic Felsic/Intermediate Igneous Rock
igneous
Blue Sapphire
Corundum (Al2O3)
gemstone
Emerald (Faceted Gemstone)
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Diamond (Green tinted)
Carbon (C) with trace impurities or lattice defects
mineral
Polished black obsidian pyramid/block
Obsidian — natural volcanic glass, chiefly rhyolitic silica (approximately 70–75% SiO₂)
igneous
Polished mahogany obsidian (likely)
Volcanic glass; primarily silica-rich rhyolitic glass (SiO₂), with iron oxides
igneous
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite/Magnetite inclusions)
igneous
Mahogany Obsidian
Obsidian (Volcanic Glass with Hematite inclusions)
igneous
Gold Sheen Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (primarily SiO2)
igneous
Black Obsidian
Obsidian (Volcanic Glass)
igneous
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (70–75% SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Mahogany Obsidian
Volcanic Glass (predominantly SiO2 with inclusions of Hematite or Magnetite)
igneous
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite or Magnetite inclusions)
igneous
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (mostly SiO2)
igneous
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Blue slag glass or dyed glass-like industrial material
Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass
mineral
Tumbled black stone, likely black obsidian
Obsidian — natural volcanic glass, primarily SiO₂
igneous
Iron Meteorite
Iron Meteorite (Group IAB or IIIAB common)
meteorite
Small dark metallic-looking rock fragment
Undetermined; possibly iron oxide-rich material or a metallic mineral
mineral
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions
igneous