White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Non Geological
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz Vein Rock
Silicon Dioxide (SiO2)
mineral
Baroque Pearl
Calcium Carbonate (Aragonite or Calcite) and Conchiolin
Organic Gemstone
Quartz (Milky or Yellow/Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Pebble
Lithic fragment / Sedimentary clast
sedimentary
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Worn River Pebble with Fossil Indentation
Sedimentary Rock with Fossil Infill
sedimentary
Sandstone (with potential fossil fragments)
Sandstone (SiO2 dominated with iron oxides)
sedimentary
Mixed Rock and Mineral Collection
Mixed Assemblage (includes Quartz, Jasper, Feldspar, and Turquoise-colored stones)
mineral
Gravel and River Pebbles
Unconsolidated rock fragments / Detrital sediment
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
mineral
Quartz with Tourmaline
Silicon Dioxide (SiO2) with complex cyclosilicate inclusions
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Quartzite fragment)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
mineral
Painted River Rock (likely Quartzite or Granite)
Quartzite or Granitic Gneiss (painted)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Zirconia (Ceramic) & Ion-X Glass
Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass
Synthetic Mineral / Glass
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz River Pebble (Quartzite)
Metamorphic Quartzite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral