Metamorphic (Modified)

Mica

Mica group (often Muscovite or Biotite)

Polished Stone Pendant (Identity Unclear)

Unknown (Possibly Jasper/Agate/Quartz mixture)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Clear Quartz

Silicon Dioxide (SiO2)

Yellow Sapphire or Citrine

Al2O3 (Corundum) or SiO2 (Quartz)

Green Tourmaline

Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4

Weathered quartz-rich metamorphic rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite with iron-oxide staining and dark inclusions

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Rhodonite

Rhodonite (MnSiO₃), a manganese inosilicate

Gneiss

Gneiss (Foliated Metamorphic Rock)

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline SiO₂, with minor mica and iron-oxide impurities

Unidentified gray mineral/rock fragment

Indeterminate from image; possibly quartz-rich material or mica-bearing schist

Weathered quartz-rich rock fragment (possibly iron-stained quartzite)

Quartzite; primarily quartz (SiO₂), with iron-oxide staining and minor accessory minerals

Small quartz-rich pebble or rock fragment

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

Muscovite mica

Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Osumilite in Granite Matrix

(K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30

Ruby Fuchsite / Ruby in Fuchsite

Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix

Rhodonite

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

Iron-stained garnet-bearing rock, possibly almandine garnet

Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Orange Calcite (likely polished specimen)

Calcite

Likely mica-rich metamorphic rock (schist)

Mica schist, probably biotite–muscovite schist; exact identification requires closer examination

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Greenstone (likely greenschist)

Chlorite–actinolite–epidote-rich metabasalt; mineral proportions cannot be confirmed from the photo

Milky quartz

Quartz, silicon dioxide (SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Mica schist fragment

Biotite–quartz–feldspar schist

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

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

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite Pebble

Quartzite (SiO2)

Quartzite Pebble (Beach Pebble)

Metamorphic Quartzite (SiO2)

Quartzite Pebble

Metamorphic Quartz (SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Quartzite with Hematite staining

Metamorphic Quartzite (SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Gneiss

Gneiss (Metamorphic Rock)

Quartzite

Metamorphic rock (SiO2)

River Pebble (Gneiss/Schist mix)

Metamorphic rock aggregate

Quartzite pebble

Metamorphic Quartzite (SiO2)

Quartzite

Metamorphic Quartzite (SiO2)