Sedimentary Or Igneous Associated Mineral

Gneiss

Gneiss

Quartz

Silicon Dioxide (SiO2)

Pumice

Pumice (Vesicular felsic extrusive igneous rock)

Malachite

Malachite (Cu2CO3(OH)2)

Gneiss

Gneiss (Metamorphic rock)

Basalt with Chert or Jasper Inclusion

Igneous basalt / sedimentary chert nodule

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Banded gneiss (likely amphibolite-bearing gneiss)

Gneiss; quartz–feldspar–mica/amphibole aggregate

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Chert / Lake Superior Agate

Cryptocrystalline Silicon Dioxide (SiO2)

Black Jasper with Quartz

Silicon Dioxide (SiO2) with impurities

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Banded Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartzite

Quartzite (Metamorphic rock composed primarily of quartz)

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock with Arfvedsonite (formerly believed to be Jasper)

Pebble (likely Quartz or Chert)

SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.

Jasper (Iron-stained Quartzite/Chert)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities

Green Jasper

Silicon Dioxide (SiO2) with impurities

Banded Carnelian Agate

Silicon Dioxide (SiO2)

Gneiss

High-grade Metamorphic Gneiss

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Iron-stained quartz (likely quartzite or quartz-rich rock)

Quartz, silicon dioxide (SiO₂), with iron-oxide staining

Chert (and associated river cobbles)

Silicon dioxide (SiO2)

Schist

Mica schist, likely muscovite–biotite schist with quartz and feldspar

Quartz (Tumbled Peach/Pink Quartz)

Silicon Dioxide (SiO2)

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Green Fluorite

Calcium fluoride (CaF2)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite - Lithium-rich Mica)

Gneiss (likely)

Gneiss

Red Jasper

Red Jasper (SiO2 with Hematite inclusions)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Copper Ore with Chalcocite

Copper sulfide (Cu2S) with associated copper-bearing minerals

Blue Apatite

Apatite (Ca5(PO4)3(F,Cl,OH))

Glacial Granite with Epidote

Granite featuring Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))