Mineral (Silicate Variety)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Granite

Intrusive Igneous Rock

Nephrite Jade

Nephrite (a variety of the Calcium magnesium iron silicate mineral series Actinolite), Ca2(Mg, Fe)5Si8O22(OH)2

Weathered quartz-rich pebble, possibly granitic gneiss

Quartz–feldspar–mica aggregate; likely granitoid or gneiss

Pallasite Meteorite (likely Imilac or Brenham)

Stony-Iron Meteorite (Pallasite)

Diorite (Spotted)

Diorite (Intrusive igneous rock)

Common Opal

Hydrated silica (SiO2 " nH2O)

Green Aventurine (or Xiuyan Jade / Serpentine)

Silicon Dioxide (SiO2) with Fuchsite inclusions or Magnesium Silicate

Serpentine (polished/tumbled)

Serpentinite; chiefly antigorite, lizardite, and chrysotile, commonly with magnetite and carbonate minerals

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Diorite

Intermediate plutonic igneous rock

Weathered gray stone, possibly basalt or granitic rock

Indeterminate fine- to medium-grained silicate rock; possible basalt, diabase, or weathered granite

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Red Ochre (Hematite-rich Clay)

Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)

Kambaba Jasper (Crocodile Jasper)

Stromatolitic Rhyolite/Jasper (SiO2)

Glauconitic Sandstone

Glauconitic Quartz Arenite

Kaolinite Claystone

Al2Si2O5(OH)4 (Kaolinite)

Weathered copper-bearing rock, possibly malachite/chrysocolla-bearing matrix

Indeterminate; likely copper carbonate/silicate minerals in a host rock, potentially malachite (Cu₂CO₃(OH)₂) or chrysocolla (hydrated copper silicate)

Glauconitic Sandstone

Glauconitic Sandstone (Quartz with Glauconite)

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

Quartz with impurities or Host Rock

SiO2 (Silicon Dioxide) with mixed silicates

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Likely weathered igneous rock fragments

Indeterminate; possibly basaltic or granitic rock with quartz, feldspar, and dark mafic minerals

Polished orbicular jasper (likely ocean jasper)

Silica-rich microcrystalline quartz/chalcedony, SiO₂; precise variety uncertain from the photo

Garnet (likely Almandine or a blend)

Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

Rhodonite Tumbled Chips

Manganese silicate (Mn,Fe,Mg,Ca)SiO3

Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)

Mixed Silicates and Sulfides (SiO2, FeS2)

Granite

Intrusive Igneous Rock

Marble

Recrystallized Calcite (CaCO3)

Pink Quartz / Rose Quartz

Silicon Dioxide (SiO2)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

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

Gold Ore

Native Gold (Au) in Quartz or Silicate matrix

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image

Likely weathered stone or mineral fragment

Unidentified fine-grained silicate rock; possible basalt, greenstone, or serpentine

Green Jasper (Chert)

Microcrystalline Quartz (SiO2) with iron/clay inclusion

Fossil-bearing limestone slab

Bioclastic limestone, likely containing brachiopod or bivalve impressions