Unknown (Likely Sedimentary Or Metamorphic)

Quartz pebble

Silicon dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Painted River Rock

Painted Quartzite or Smooth Siltstone

Banded gneiss (likely garnet-biotite or quartz-feldspar gneiss)

Gneiss; predominantly quartz (SiO₂), feldspar, and dark biotite/amphibole

Orange Calcite (likely polished specimen)

Calcite

Banded gneiss pebble

Gneiss, likely quartz–feldspar–mica gneiss

Quartz fragment

Quartz (silicon dioxide, SiO₂)

Quartz (likely Rose or Milky Quartz)

Silicon Dioxide (SiO2)

Small white mineral fragment

Indeterminate; possibly quartz, calcite, or feldspar

Pyrite-bearing metamorphic rock (likely schist or quartzite)

Mica/quartz-rich metamorphic matrix with pyrite (FeS₂), possibly chalcopyrite (CuFeS₂)

Uncertain gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica rock; exact identification requires close examination

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Banded metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss, possibly amphibolite-bearing

Gold-colored mineral specimen, likely pyrite or weathered mica schist

Tentatively pyrite (FeS₂); identification is uncertain from the obscured image

Pyrite

Iron Sulfide (FeS2)

Quartz vein fragment

Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions

Native Silver Nugget

Silver (Ag)

Tumbled hematite (likely hematite-rich ironstone)

Hematite, Fe₂O₃; possibly mixed with magnetite or goethite

Red Jasper

Jasper (Silicon Dioxide Si₂O₃)

Weathered iron-rich metamorphic rock (probable amphibolite or schist fragment)

Likely hornblende–plagioclase amphibolite with biotite/chlorite alteration; exact identification requires testing

Natural freshwater pearls

Pearl (nacreous calcium carbonate; chiefly aragonite, CaCO₃)

Rough amber-colored quartz or calcite fragment

Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Quartz Pebble

Silicon Dioxide (SiO2)

Gneiss

Feldspar–quartz–mica gneiss, locally amphibole-bearing

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Yellow Calcite

Calcium Carbonate (CaCO3)

Tumbled blue stone and polished red-brown stone

Likely sodalite or blue aventurine; red specimen possibly jasper or polished flint/chert

Quartzite Cobble

Metamorphic Quartzite (SiO2)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Feldspar (specifically Orthoclase or Plagioclase)

Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate

Green Aventurine

Silicon dioxide (SiO2) with fuchsite inclusions

Small quartz-rich pebble or rock fragment

Quartz (silicon dioxide, SiO₂), possibly with iron-oxide staining or host-rock inclusions

Quartz geode slice

Microcrystalline and crystalline quartz, silicon dioxide (SiO₂)

Garnet-Mica Schist

Garnetiferous Porphyroblastic Schist

Jasper (Red and Yellow)

Silicon Dioxide (SiO2) with iron oxide impurities

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Weathered dark stone, possibly basalt

Basalt; commonly plagioclase feldspar, pyroxene, and minor olivine

Banded gneissic rock

Gneiss, likely quartz–feldspar–biotite gneiss