Sedimentary And Igneous (Mixed)

Mixed Tumbled Stones (Mostly Agate, Jasper, and Quartz)

Silicon Dioxide (SiO2)

Red-brown iron-rich mineral specimen, likely hematite/goethite

Hematite (Fe₂O₃), possibly mixed with goethite (FeO(OH)) and iron oxides

Botryoidal Hematite

Iron Oxide, Fe2O3

Pyrite

Iron Sulfide (FeS2)

Amazonite-like microcline bead bracelet

Microcline feldspar, KAlSi₃O₈; likely mixed with pale amazonite, quartz, or other feldspar beads

Rounded river pebbles

Unidentified mixed lithologies; the reddish pebble may be iron-stained sandstone or volcanic rock

Ironstone Concretion (Limonite/Hematite Nodules)

Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)

Likely yellow calcite

Calcite (CaCO₃)

Polished/tumbled brecciated jasper (likely rainforest or ocean jasper)

Microcrystalline quartz (SiO₂), commonly mixed with chalcedony, iron oxides, and other silicates

Calcite

Calcium Carbonate (CaCO3)

Weathered quartz-bearing rock, possibly calcite vein fragment

Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)

Mixed Agate and Lapis Lazuli Bracelet

Chalcedony (SiO2) and Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Quartz (Milky / Massive Quartz)

Silicon Dioxide (SiO2)

White Calcite

Calcium Carbonate (CaCO3)

Likely assorted beach/river pebbles

Undetermined mixed lithologies; visible pieces may include quartz-rich and volcanic rocks

Garnet-bearing granite or pegmatitic granitic rock

Coarse-grained granitoid, likely granite or pegmatite, composed mainly of quartz and feldspar with almandine/spessartine garnet and dark biotite or amphibole

Pyrite

Iron Sulfide (FeS2)

Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)

Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)

Quartz

Silicon Dioxide (SiO2)

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Blue sodalite (likely rough fragments)

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly mixed with blue calcite or lapis lazuli

Jasper

Microcrystalline quartz (SiO2)

Green calcite (rough specimen)

Calcite, CaCO₃

Yellow Jasper

Silicon dioxide (Microcrystalline quartz, SiO2)

Zoisite with Ruby (Anyolite)

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

Red jasper chips

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

Calcite

Calcium Carbonate (CaCO3)

Small quartz crystal fragment

Quartz, SiO₂

Quartz geode or quartz-bearing rock

Quartz (SiO₂), likely in a chalcedony- or basalt-hosted cavity

Quartz (in matrix)

Quartz (SiO₂)

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly iron-stained or included in a mixed rock; exact identification is uncertain from the image

Uncertain dark-and-white rock fragment

Likely a mixed lithic specimen, possibly quartz-bearing granite or ore; exact identification is not possible from the photograph

Likely tumbled orange calcite

Calcite (CaCO₃)

Specular Hematite with Quartz and Limonite

Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)

Pyrite

Iron Sulfide (FeS2)

Honey calcite (rough crystal fragment)

Calcite, CaCO₃

Likely limonite/goethite-rich ironstone

Limonite (amorphous hydrated iron oxides), commonly mixed with goethite, hematite, and host rock

Limonite

FeO(OH)•nH2O

Bloodstone (Heliotrope)

SiO2 (Cryptocrystalline Quartz / Chalcedony)

Quartz-rich rock, possibly milky quartz or quartzite fragment

Quartz (SiO₂), potentially quartzite if metamorphic

Honey-colored quartz cluster

Quartz, silicon dioxide (SiO₂), likely iron-stained or included quartz