Mineral (Specifically A Cryptocrystalline Variety Of Quartz)

Pink Granite (River Pebble)

Phaneritic Felsic Igneous Rock

Jasper with Chalcedony

Silicon Dioxide (SiO2)

Chert (Jasper/Flint Pebble)

Microcrystalline quartz (SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Banded Agate (with possible Chalcedony layers)

Silicon dioxide (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Dyed Agate

Silicon Dioxide with artificial pigment (SiO2)

Black Onyx

Silicon Dioxide (SiO2) with cryptocrystalline structure

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

Yooperlite (Sodalite-bearing Syenite)

Sodalite-rich Syenite

Fuchsite in Quartz (Aventurine Quartz)

K(Al,Cr)2(AlSi3O10)(OH)2 (Fuchsite) + SiO2 (Quartz)

Rose Quartz

Silicon Dioxide (SiO2)

Citrine

SiO2 (Silicon Dioxide)

Milky Quartz

Silicon Dioxide (SiO2)

Chert (Flint) with Glauconite

Microcrystalline Quartz (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Rose Quartz

Quartz (SiO2) with trace elements of titanium, iron, or manganese

Jasper

Jasper (Silica/Quartz) - SiO2

Blue Quartz (Dumortierite Quartz)

Quartz (SiO2) with inclusions of Dumortierite (Al7(BO3)(SiO4)3O3)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 predominantly)

Chert (containing Flint and Chalcedony)

Microcrystalline Quartz (SiO2)

Tiger's Eye

SiO2 (Quartz with inclusion of iron oxides)

Yellow Jasper

Silicon Dioxide (SiO2) with high iron inclusion

Chert (Flint)

Silicon Dioxide (SiO2)

Smoky Quartz

Quartz (Silicon Dioxide) - SiO2

Blue Aventurine

Silicon Dioxide (SiO2) with inclusions of Dumortierite

Unakite

Unakite (Epidotized Granite)

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

Red Moss Agate or Jasper-Agate

Silicon Dioxide (SiO2)

Jasper

Silicon dioxide (SiO2)

Chert

Microcrystalline Quartz (SiO2)

Rose Quartz

Quartz (Silicon Dioxide - SiO2) with trace impurities of Titanium, Manganese, or Iron

Grey Chalcedony (Tumbled Moon)

Microcrystalline Quartz (SiO2)

Limestone (specifically Bituminous or Carbonaceous Limestone)

Calcium Carbonate (CaCO3) with Organic Impurities

Chalcedony (Quartz variety)

Silicon Dioxide (SiO2)

Amethyst (variety of Quartz)

SiO2 (Silicon Dioxide) with trace iron impurities

Amethyst (Quartz variety)

Amethyst [Silicon Dioxide (SiO2)]

Amethyst (Variety of Quartz)

Silicon Dioxide (SiO2) with iron impurities

Chert / River Cobble

Microcrystalline Quartz (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)