Granite
Phaneritic Felsic Intrusive Rock (Granite)
Igneous
Category
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Granite pebble
Granite, chiefly quartz, feldspar, and mica
igneous
Colorless faceted gemstone (likely cubic zirconia)
Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond
gemstone
Amethyst Cluster
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz on Matrix
Silicon Dioxide (SiO2) with trace impurities and aluminum inclusions
mineral
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Riverstone Jasper (Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Pink Granite
Phaneritic intrusive igneous rock (high Potassium-Feldspar)
igneous
Granite (specifically Pink Granite)
Phaneritic Plutonic Rock (High Potassium Feldspar Granite)
igneous
Shale with Siltstone layering
Sedimentary Clastic Rock (Mudstone/Shale)
sedimentary
Amethyst Geode (Carved)
Amethyst (Violet Crystalline Quartz - SiO2)
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Sandstone Concretion
Arenaceous concretion (primarily SiO2 with Fe2O3 staining)
sedimentary
Black Pebble (Basalt / Chert)
SiO2 (if Chert) or Mafic Igneous Rock (if Basalt)
igneous
Hag Stone
Perforated Sedimentary Rock (primarily Siltstone or Mudstone)
sedimentary
Blue Sapphire (Tumbled/Polished)
Corundum (Al2O3)
mineral
Black Onyx
Silicon Dioxide (SiO2) with parallel banding
mineral
Purple Dyed Agate Geode (Banded Chalcedony)
Silicon Dioxide (SiO2) - variety: Agate
mineral
Beach Pebble (Gray Quartzite / Fine-Grained Metasediment)
Quartzite (SiO2-dominated rock) / Metamorphic Sandstone
metamorphic
Granite
Granite (silica-rich intrusive igneous rock)
igneous
Granite
Phaneritic Felsic Igneous Rock (composed主に of SiO2, Al2O3, K2O, Na2O)
igneous
Pumice
Pumice (Vesicular Rhyolite/Andesite)
igneous
Likely weathered granite or granitic pegmatite
Granite; mainly quartz (SiO₂), feldspar, and mica, with possible iron-oxide staining
igneous
Banded Agate
Microcrystalline Quartz (SiO2) with impurities
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Oolitic Chert
Silicon Dioxide (SiO2) with oolitic texture
sedimentary
Amethyst
Amethyst (SiO2)
mineral
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Mixed polished gemstone bead lot, likely dyed agate and quartz
Chalcedony (microcrystalline quartz, SiO₂), with possible amethyst, aventurine, and other dyed quartz varieties
gemstone
Citrine
Citrine (Silicon Dioxide - SiO2)
mineral
Druzy Quartz Geode (with Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster on Matrix
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2 + Fe4+)
mineral
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Emerald in Matrix (Quartz/Schist)
Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities
mineral
Pink Granite
Phaneritic intrusive igneous rock (Granite)
igneous
Dyed or color-enhanced agate/microcrystalline quartz bead
Chalcedony (microcrystalline SiO₂), likely agate
gemstone
Sandstone (Banded)
Arenite (primarily SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Blue Quartzite (Dyed Quartzite)
Quartzite (SiO2 with dye enhancements)
metamorphic