Antropogenic (Man Made Glass Byproduct)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Green Fluorite

Calcium fluoride (CaF2)

Calcite

Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Unidentified translucent mineral fragment, possibly calcite

Calcite (calcium carbonate, CaCO₃), tentative identification

Chalcedony (likely agate/chert fragment)

Microcrystalline quartz, SiO₂

Ferrochrome Slag

Calcium-Aluminium-Magnesium Silicate Slag

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)

Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Amber

Succinite (with a generalized formula of C10H16O)

Sandstone

Clastic Sedimentary Rock

Limestone

CaCO3 (Mainly Calcite or Aragonite)

Note on Image Identification: Textile

N/A (Anthropogenic material)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Polished red jasper beads

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Quartzite (River Pebble)

Metamorphosed Quartz-rich Sandstone (SiO2)

Iron Slag

Anthropogenic pyrometallurgical residue

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Black Obsidian

Volcanic Glass (predominantly SiO2)

Obsidian

Obsidian (volcanic glass)

Iron-rich quartzite or ironstone fragment

Quartzite dominated by quartz (SiO₂), with iron oxides such as hematite/goethite

Tumbled blue-gray chalcedony (likely blue agate)

Chalcedony, microcrystalline quartz (SiO₂)

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Iron Slag

Iron Slag (Industrial Vitreous Material)

Silver (Sterling Silver Jewelry)

Argentum (Ag) mixed with Copper (Cu)

Green Chert (Jasper)

Silicon Dioxide (SiO2)

Diamond in Kimberlite

Diamond (C in Kimberlite Matrix)

Bituminous Coal (with Anthracite or Vitrinite inclusion)

Organic-rich Sedimentary Rock (Carboniferous classification)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Granite

Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)

Quartz

Silicon Dioxide (SiO2)

Weathered sandstone or iron-stained sedimentary stone

Quartz-rich sandstone, commonly arkose or lithic sandstone; composition cannot be confirmed visually

Chert (Fossiliferous)

Silicon dioxide (SiO2)

Sandstone (lithic)

Lithic Wacke / Arenite

Sandstone

Arenite (SiO2 based with various mineral cements)

Weathered quartz-rich cobble, possibly quartzite or feldspar-rich granite

Quartz–feldspar aggregate; identification is uncertain from the photograph

Tumbled jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Weathered quartz-rich rock, possibly sandstone or quartzite

Likely quartzite (mostly SiO₂), though a granular sandstone is also possible

Limestone

Calcium Carbonate (CaCO3)