Uncertain

Browse uncertain specimens identified by the Rock Identifier community.

Unidentifiable Rock Fragment

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Marble

Metamorphosed Limestone (calcite formulation CaCO3)

Marble

Recrystallized Carbonate Rock (CaCO3)

Marble

Recrystallized Calcite (CaCO3) Rock

White Marble

Recrystallized Calcite (CaCO3)

Oolite or Oolitic Limestone

Oolitic Limestone (Principal mineral: Calcite, CaCO3)

Basalt

Basalt