Mineral In A Matrix (Likely Quartz Or Feldspar)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Amygdaloidal Basalt

Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Glacially transported granite and gneiss boulders

Granite (quartz–feldspar–mica); banded specimens likely gneiss

Porphyritic Rhyolite (Llanite or similar)

Porphyritic Rhyolite / Quartz-Feldspar Porphyry

Dalmatian jasper (likely orbicular microgranite)

Quartz–feldspar–biotite/pyroxene microgranite; commonly marketed as Dalmatian jasper

Andesite Porphyry

Porphyritic Andesite (Intermediate volcanic rock)

Sandstone (Quartzose Pebble)

Clastic Sedimentary Rock (Litharenite/Quartz arenite)

Leopardite

Porphyritic Quartz Monzonite or Rhyolite

Likely weathered granite or granitic pegmatite fragment

Granite, composed mainly of quartz, feldspar, and dark mica or amphibole

Quartz crystal fragment in weathered host rock

Quartz (SiO₂), possibly in a feldspathic or iron-stained matrix

Quartz Veined Siltstone

Siltstone with Quartz Intrusion (SiO2)

Sandstone with Quartz Sphere

Arenite (SiO2-rich sedimentary rock) with Quartzite/Rose Quartz sphere

Weathered granitic rock

Granite, likely biotite granodiorite

Porphyritic Basalt (likely artificially dyed or altered)

Basalt with plagioclase phenocrysts (likely treated)

Weathered quartz-rich rock, likely granite or granitic gneiss

Granite (quartz–feldspar–mica aggregate), possibly weathered granitic gneiss

Porphyritic Basalt (with Quartz or Calcite inclusion)

Porphyritic Basalt (Matrix: SiO2/MgO/FeO, Phenocryst: likely Quartz or Calcite)

Granite Pebble

Granite (Plutonic Igneous Rock)

Quartz Vein in Hematitic Siltstone

Hydrothermal Quartz (SiO2) in Ferriferous Matrix

Granite-like igneous rock

Likely medium-grained granite or granodiorite; quartz–feldspar–mica aggregate

Orbicular Jasper (Ocean Jasper tendency)

Silicon Dioxide (SiO2) with impurities

Granite

Granite

Quartz Vein in Basalt or Porphyry

Silicate-veined volcanic rock

Conglomerate

Polymictic conglomerate; rounded clasts cemented in a fine-grained matrix

Granite

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Olivine in Quartz/Feldspar Matrix (Peridotite or Granitic Pegmatite)

(Mg,Fe)2SiO4 (Olivine) with Quartz / Feldspar

Granite

Intrusive Felsic Igneous Rock

Rounded granite cobble

Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende

Granite Pebble

Phaneritic Felsic Igneous Rock

Weathered, iron-stained quartz-rich pebble (uncertain identification)

Microcrystalline quartz, SiO₂, with iron-oxide/hydroxide staining and dark matrix inclusions

Aquamarine with Quartz

Beryl (Be3Al2Si6O18) with Quartz (SiO2)

Quartz-rich breccia or conglomerate

Siliciclastic conglomerate/breccia, predominantly quartz and feldspar clasts in a rusty iron-oxide cement

Amygdaloidal Basalt

Basalt with secondary amygdule minerals (likely Epidote or Chlorite)

Amygdaloidal Basalt with Quartz

Basalt (SiO2 inclusion)

Quartz-rich pegmatite (likely feldspar–quartz rock)

Granitic pegmatite; predominantly quartz (SiO₂) and feldspar, with possible mica and iron-oxide staining

Porphyry

Porphyritic Andesite / Basaltic Porphyry

Likely mica-rich schist with embedded dark pebble

Biotite–quartz schist; dark clast possibly basalt or chert

Weathered granitic rock

Granite or granodiorite; mainly quartz, feldspar, and mica/amphibole

Vein-bearing sandstone or quartzite cobble

Quartz-rich sandstone with white quartz veins; possibly metamorphosed to quartzite

Quartz-rich feldspathic pebble, possibly granite or granitic gneiss

Quartz–feldspar aggregate, likely granite; dark inclusion may be biotite, hornblende, or iron-oxide staining

Drupa Quartz (Sparkly Drusy Quartz on Matrix)

Crystalline Silicon Dioxide (SiO2) on host rock

Mixed Mineral Collection (with Quartz, Beryl, and host rock)

Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite