Mineraloid (Cryptocrystalline Quartz)

Green Aventurine

Aventurine (Silicon dioxide, SiO₂)

Jasper pebble

Silicon dioxide (SiO2) with iron oxide inclusions

Chert (variously known as Flint or Microcrystalline Quartz)

Silicon dioxide (SiO2)

Mookaite Jasper

Siliceous sedimentary rock (variety of Jasper/Chert)

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.

Botryoidal Chalcedony

Chalcedony (SiO2)

Chert / Flint

Chert (varietal name for microcrystalline quartz). Chemical formula: SiO₂

Chalcedony (specifically Agate or Moonstone-like Quartz)

Silicon Dioxide (SiO2)

Banded Iron Formation (Red Jasper and Hematite Chert)

Banded Iron Formation (BIF); Fe2O3 (Hematite) + SiO2 (Quartz/Jasper)

Red Jasper (beads)

SiO₂ (Silicon Dioxide)

Banded Iron Formation (Jasper-Hematite)

Banded Iron Formation (BIF); composition primarily Hematite (Fe2O3) and Chalcedony/Quartz (SiO2)

Banded Iron Formation

Banded Iron Formation (BIF)

White Chalcedony (likely Common Opal or Milky Quartz)

Silicon Dioxide (SiO2)

Red Jasper (River Pebble)

Silicon Dioxide (SiO2) with hematite impurities

Jasper (Tumbled)

Silicon Dioxide (SiO₂)

Jasper River Pebble

Jasper (Silicon Dioxide, SiO2)

Jasper

Silicon Dioxide (SiO2)

Onyx Marble (also commonly called Onyx)

Calcite (CaCO3), often with other mineral impurities

Chert or Flint (polished/water-worn)

Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and magnesium inclusions

K2 Jasper (Beads)

Granodiorite with Azurite and Malachite

Red Jasper

Silicon Dioxide (SiO₂)

Banded Agate (specifically Botryoidal/Orbicular Agate)

Silicon Dioxide (SiO2)

Shale or Argillite

Shale (sedimentary) / Argillite (metamorphic)

Blue Lace Agate

Silicon Dioxide (SiO₂)

Jasper River Pebble

Silicon Dioxide (SiO2)

Chert / Flint

Chert (varieties include Flint)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Botryoidal Chalcedony with Calcite

Chalcedony (SiO2 with accessory minerals, likely CaCO3)

Chert (Jasper or Flint variant)

Chert (composed of microcrystalline quartz, SiO2)

Jasper, possibly Brecciated Jasper or Ocean Jasper due to patterns and color

Silicon Dioxide (SiO2), a variety of Chalcedony

Banded Agate (likely Carnelian Agate or Sardonyx)

Agate is a common name for a microcrystalline variety of Quartz (SiO₂), specifically a form of Chalcedony.

Ocean Jasper

Orbicular Jasper (variety of Chalcedony - SiO2)

Banded Iron Formation (BIF)

Banded Iron Formation

Jade (likely Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Concretion or Geode (unbroken)

Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.

Quartzite

Quartzite (primarily SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble (often referred to as 'Sea Glass' or 'River Stone' when worn smooth)

Silicon Dioxide (SiO2)

Quartzite pebble

Quartzite (SiO2)