Crushed Stone (Likely Limestone or Granite)
Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite
sedimentary or igneous
Category
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Polished chalcedony (likely sagenite or included agate)
Microcrystalline quartz, SiO₂, with iron-oxide and possibly rutile/goethite inclusions
gemstone
Chert (Iron-stained)
Silicon Dioxide (SiO2) with Iron Oxides
sedimentary
Sandstone
Arenite (SiO2 based typically)
sedimentary
Sandstone
Arenite (SiO2 based typically)
sedimentary
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Mineral (or mineraloid if microcrystalline)
Blue Topaz
Al2SiO4(F,OH)2 (Aluminum silicate fluoride hydroxide)
gemstone
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Sandstone
Arenite (SiO2 based with cement)
sedimentary
Muscovite Mica
Muscovite KAl2(AlSi3O10)(OH)2
mineral
Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Mineral
Chalcedony (Grey/White Agate)
Silicon Dioxide (SiO₂)
mineral
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Chert
Microcrystalline silica (SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based typically)
sedimentary
Chert (River Pebble)
Microcrystalline silica (SiO2)
sedimentary
Copper-bearing rock, likely native copper in a matrix
Native copper (Cu), possibly with cuprite/malachite in a basaltic or porphyritic matrix
mineral
Celestine (Celestite)
Celestine (Strontium Sulfate, SrSO4)
mineral
Painted Garden Rock
Coated Siltstone or Mudstone
sedimentary
Hag Stone
Perforated Sedimentary Rock
sedimentary
Diorite
Diorite
igneous
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flinty variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Weathered quartz-rich pebble
Likely quartz-bearing vein rock; exact identification requires testing
mineral
Chert Arrowhead
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
mineral
Copper Ore
Mixed copper sulfides/oxides in gangue matrix
mineral
Chert Pebble/Nodule
Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)
Sedimentary
Mixed Gemstone and Mineral Collection
Silicon Dioxide (SiO2) based minerals and others
mineral
Sandstone
Arenite (SiO2 dominant)
sedimentary
Chert (Sedimentary Rock)
Silicon Dioxide (SiO2)
sedimentary
Chert (Common Variety, Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO₂)
sedimentary
Native Copper
Copper (Cu)
mineral
Coquina
Biogenic Limestone (Coquina)
sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Polished yellow jasper cabochon
Jasper, microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions
metamorphic
Chert with Chalcedony/Quartz Vug
Cryptocrystalline Silica (SiO2)
sedimentary
Otodus Shark Tooth
Otodus obliquus
fossil
Diamond in Gold Setting
Diamond (C - pure carbon)
mineral