Mineral In A Matrix (Likely Quartz Or Feldspar)

Weathered quartz-rich cobble, possibly granitic gneiss

Probable quartz–feldspar–mica aggregate; exact lithology uncertain from image

Granite

Phaneritic plutonic rock (SiO2 + Al2O3)

Quartz-rich pegmatite (likely milky quartz with feldspar and mica)

Granite pegmatite; chiefly quartz (SiO₂), with feldspar and mica-group minerals

Weathered porphyritic volcanic rock

Likely porphyritic andesite or basalt; exact identification requires a fresh surface and testing

K2 stone (azurite–granite)

Biotite granite hosting blue azurite (Cu₃(CO₃)₂(OH)₂), often with malachite and quartz

Granite

Granite (High-silica plutonic rock)

Weathered granite (likely biotite granite)

Granite; interlocking quartz, feldspar, and mica, commonly with biotite

Milky Quartz in Conglomerate Matrix

Silicon Dioxide (SiO2) within Clastic Sedimentary Rock

Fish Fossil in Limestone

Lycoptera (likely) in Micritic Limestone

Likely quartz fragment

Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock

Quartz-rich granite or granitic pegmatite

Coarse crystalline aggregate of quartz (SiO₂), feldspar, and mica; exact identification is uncertain from the image

Pink Granite

Granite (enriched in Potassium Feldspar / Orthoclase)

Unakite (likely epidote–feldspar rock)

Epidote–K-feldspar–quartz aggregate; commonly approximated as pink orthoclase/microcline + green epidote + quartz

Polished ocean jasper (orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron oxides and assorted alteration minerals

Yellow Jasper

Silicon Dioxide (SiO2) with high iron inclusion

Pink granite (weathered, rounded cobble)

Granite; predominantly quartz, potassium feldspar, plagioclase, and mica/amphibole

Granite

Intrusive igneous rock (Granite)

Quartz-rich granite or granitic gneiss

Granite; chiefly quartz (SiO₂), feldspar, and mica

Dalmatian Jasper (Dalmatian Stone)

Perthitic feldspar with Arfvedsonite inclusions

Dalmatian Jasper (Dalmatian Stone)

Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)

Quartz (Druzy on Matrix)

Silicon Dioxide (SiO2)

Dalmatian Stone

Dalmatian Jasper (a trade name for an igneous microcrystalline rock composed mostly of feldspar, quartz, and dravite)

Polished pink-and-black granite or gneiss

Granite–gneiss, chiefly quartz, feldspar, and biotite/amphibole

White chalcedony or quartz-rich pebble

Microcrystalline quartz (SiO₂), possibly with minor calcite or feldspar

Likely weathered granite or granitic gneiss

Granite: quartz + feldspar + mica; possibly gneiss if foliation is present

K2 Jasper (K2 Granite)

Azurite-in-Granite

Quartz-bearing feldspathic rock, likely weathered granite or pegmatite

Granite/pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica

Pink Granite Porphyry Cobble

Porphyritic K-Feldspar Granite

Smoky Quartz with Feldspar

SiO2 (Quartz) with KAlSi3O8 (Feldspar)

Tumbled granite (pink granite pebble)

Felsic intrusive igneous rock; chiefly quartz, alkali feldspar, plagioclase, and minor biotite/hornblende

Gneiss (Green Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Conglomerate

Clast-supported polymict conglomerate

Weathered granite or granodiorite fragment

Granite–granodiorite, chiefly quartz, feldspar, and dark biotite/amphibole

Quartz-rich granite or pegmatitic rock

Granite/pegmatite; chiefly quartz (SiO₂), feldspar, and minor mica

Porphyritic Basalt with K-Feldspar Phenocryst

Porphyritic Basic Igneous Rock (with Potassium Feldspar)

Citrine-bearing quartz cluster

Quartz, silicon dioxide (SiO₂), with iron-related yellow coloration

Granite Glacial Erratic

Intrusive Phaneritic Felsic Rock (Granite)

Small rounded pebble, likely quartz-rich stone

Indeterminate from photograph; possibly microcrystalline quartz (SiO₂) or a weathered silicate pebble

Mixed rock fragments, likely basalt and weathered granite

Probable mafic volcanic rock (basalt) with granitoid fragments; exact identification is uncertain from the image

Granite Pebble (Weathered)

Phaneritic Felsic Igneous Rock

Dark, mica-rich metamorphic rock (probable schist or gneiss fragment)

Likely biotite–quartz–feldspar schist; exact identification requires testing

Amazonite

Amazonite (KAlSi3O8)