Mineral Like (Anthropogenic)

Silver (Native Element / Alloy)

Silver (Ag)

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Quartz Druzy (on Calcedony/Quartz base)

Silicon Dioxide (SiO2)

Agate (translucent slice)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Diorite

Diorite

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Granite

Granite

Jasper (Milky/Cream Variety)

Silicon Dioxide (SiO2) - variety of Chalcedony

Schist

Mica Schist

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)

Cream Marble (Speckled)

Metamorphosed Limestone (mainly CaCO3)

Quartz Vein with Iron Staining

Silicon Dioxide (SiO2)

Rutilated Quartz

SiO2 with TiO2 inclusions

Basalt with Vesicles

Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)

Quartz Geode (with Agate banding)

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based)

Agate

Chalcedony (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Petrified Wood

Silicified Wood / Chalcedony (SiO2)

Blue Chalcedony Geode (with Quartz Druzy)

Silicon Dioxide (SiO2) - Microcrystalline variety of Quartz

Smoky Quartz with Amethyst

Silicon Dioxide (SiO2)

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Optical Calcite

Calcium Carbonate (CaCO3)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Gneiss

Foliated Metamorphic Rock

Greenstone

Metabasalt / Chlorite-Epidote Schist

Granodiorite

Granodiorite (intermediate plutonic rock)

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Kyanite (within Quartz)

Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)

Basalt with Epidote/Chlorite

Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))

Garden Quartz (Phantom Quartz)

Silicon Dioxide (SiO2) with various inclusions (often Chlorite, Hematite, or Iron)

Obsidian

Volcanic Glass (Amorphous Silica)

Gneiss (specifically a Granitic Gneiss)

Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)

Gneiss

Metamorphic rock of high-grade regional metamorphism

Garnet (likely Pyrope or Almandine)

Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Black Kyanite

Kyanite (Al2SiO5) with carbonaceous inclusions