The Purple Specimen Is A Mineral (Amethyst); The White Specimen Is A Sedimentary Rock (Limestone Or Marble).

Chert (specifically Flint or Common Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Amethyst (Rose-tinted variation)

Silicon Dioxide (SiO2) with trace iron impurities

Quartzite with Quartz Geode / Vug

Crystalline Silicon Dioxide (SiO2) in Metamorphic Host

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Granite with Quartz Vein

Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)

Quartz

Silicon Dioxide (SiO2)

Chert / Jasper

Silicon Dioxide (SiO₂)

Turquoise in Matrix

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz Geode (partially opened)

Silicon Dioxide (SiO2) with iron staining

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Banded Agate (River Stone)

Agate (Silicon Dioxide - SiO2)

Jasper Agate

Chalcedony (Silicon Dioxide - SiO2)

Schist (Micaceous Schist)

Schist (containing mainly Muscovite and Quartz)

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Chert (Flint Pebbles)

Microcrystalline quartz (SiO2)

Rough Emerald (Beryl)

Emerald (Be3Al2(SiO3)6 with Cr/V impurities)

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

N/A (The provided image is a storyboard/digital document)

Chert (Common Opal/Jasper variety)

Microcrystalline Quartz (SiO2) with hydration

Chert (River Pebble)

Chert (Microcrystalline Quartz, SiO2)

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

Agatized Fossil or Chalcedony Nodule

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (Jasper)

Jasper (Silicon Dioxide, SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Goethite)

Honey Calcite

Calcium Carbonate (CaCO3)

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Druzy Agate (Star-cut Geode Slice)

Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline Quartz

Chakra Tumbled Stone Set

Various (including Amethyst [SiO2], Sodalite [Na8(Al6Si6O24)Cl2], Green Aventurine [SiO2], Red Jasper [SiO2], etc.)

Gneiss (High-grade Metamorphic Rock)

Gneiss (Metamorphic silicate rock)

Veined Pebble (likely a Quartz-Veined Pebble)

Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)

Chert (Yellow/Tan Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Manganese Oxide Crust on Limestone

Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3

Amethyst (Faceted)

Silicon Dioxide with Iron impurities (SiO2)

Chert (Common Opal or Flint variant)

Microcrystalline Quartz (SiO2)

Gneiss (Schistose)

Gneiss

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Ferruginous Quartz Cobble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

River Quartzite / Tumble-Polished Quartz

Quartzite (SiO2)