Jasper (likely Kambaba or Crocodile Jasper variety)
Silicon Dioxide (SiO2) with inclusions
sedimentary
Category
Mineraloid (Man Made Origin)
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Stardust (Micrometeorite)
Chondrite / Micrometeorite (Extraterrestrial Silicate)
igneous
Fluorite (specifically Rainbow Fluorite or Purple Fluorite)
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (Purple Octahedron)
Calcium Fluoride (CaF2)
Mineral
Quartz (Common Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Chert (Common Opal/Agate inclusion)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Amber
Succinite (organic mineraloid); Chemical formula: C10H16O
mineral
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Opal (Precious Opal)
Hydrated Silica (SiO2·nH2O)
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass)
Igneous
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (70-75% SiO2)
igneous
Limonite (Iron Ore)
Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O
mineral
Granite
Granite
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Green Chert
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Sandstone (Micaceous)
Clastic Sedimentary Rock (primarily SiO2 with Mica)
sedimentary
Diamond
Natural Carbon (C)
mineral
Diamond (Princess Cut)
Carbon (C)
mineral
Sandstone (likely Quartzite-rich)
Arenite (primarily SiO2)
sedimentary
Granite
Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
River Rock (Basalt/Greywacke pebbles)
Fluvial gravel primarily composed of Mafic Volcanic Rock (Basalt) or Lithic Sandstone (Greywacke)
igneous and sedimentary
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate), Be3Al2(SiO3)6
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
mineral
Sandstone (Quartzose Pebble)
Arenite (SiO2)
sedimentary
Black Sapphire (Basaltic Blue Sapphire)
Corundum (Al2O3)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Mineraloid
Chalk
Micrite (primarily Calcium Carbonate, CaCO3)
sedimentary
Diamond (or Cubic Zirconia simulant)
Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ
mineral
Moissanite
Silicon Carbide (SiC)
mineral
Diamond
Carbon (C)
mineral
Ruby (Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Blue Sapphire
Corundum (Al2O3 with trace Titanium and Iron)
mineral
Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
sedimentary
Snowflake Obsidian
Volcanic glass containing Spherulitic Cristobalite (SiO2)
igneous
Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)
igneous
Obsidian
Volcanic Glass (70-75% SiO2)
igneous
Opal
Hydrated Silica (SiO2·nH2O)
mineral