Industrial Byproduct

Black Tourmaline (Schorl)

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

Diamond (Rough)

Diamond (C)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)

Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)

Fluorite (likely)

Calcium Fluoride (CaF2)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Calcite (Yellow/Orange variety - sometimes called Honey Calcite)

Calcite

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Pyrite

Pyrite (Iron sulfide, FeS₂)

Fluorite

Fluorite (CaF₂)

Pyrite

Pyrite (Iron Disulfide), FeS2

Serpentine

Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)