Mineral In Igneous Rock

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Given the appearance, it's likely a fragment of an igneous or metamorphic rock composed of multiple minerals. Without specific diagnostic features, it's difficult to give a common name other than 'crystalline rock fragment'. If pressed to guess based on the granular, somewhat light and dark speckled appearance, it could be a fragment of granite or a related intrusive igneous rock.

As a rock fragment, it does not have a single scientific mineral name; rather, it's a piece of a rock which is a combination of minerals. If it were granite, its main mineral composition would be quartz (SiO2), feldspar (e.g., KAlSi3O8 - orthoclase, (Na,Ca)(Al,Si)4O8 - plagioclase), and mica (e.g., KAl2(AlSi3O10)(OH)2 - muscovite or K(Mg,Fe)3AlSi3O10(OH)2 - biotite), among others.

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Drill Core Samples (Varied Lithology)

Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)

Quartz (Smoky/Grey variety)

Silicon Dioxide (SiO2)

Vesicular Basalt (Amygdaloidal)

Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Not a geological specimen

N/A (man-made object)

Quartz (Milky or Yellow variety)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Amygdaloidal Basalt with Quartz/Zeolite Infill

Amygdaloidal Basalt (extrusive volcanic rock with SiO2 or CaAl2Si3O10·3H2O infill)

Quartz Pebble

Silicon Dioxide (SiO2)

Granite

Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)

Quartz

Silicon Dioxide (SiO2)

Quartz Crystal Cluster

Quartz (Silicon Dioxide, SiO2)

Granite

Phaneritic Plutonic Felsic Rock (KAlSi3O8 - SiO2 - NaAlSi3O8)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Granite

Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Basalt with Scoria/Vesicular Texture

Vesicular Basalt (Iron-rich/Oxidized)

Hematite (Iron Ore)

Hematite (Fe2O3)

Unknown Rock Specimen

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Basalt

Basalt (Mafic volcanic rock)

Basalt River Stone

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Vesicular Basalt

Extrusive mafic igneous rock (primarily Plagioclase Feldspar and Pyroxene)

Geodude

Geodude (Rock Pokémon: No. 74)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Black Tourmaline

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble (with probable iron staining)

Silicon dioxide (SiO2)

Amygdaloidal Rhyolite

Amygdaloidal Rhyolite (Felsic volcanic rock)

Rhyolite

Rhyolite (felsic extrusive igneous rock)

Quartz (Smoky or Clear variety with inclusions)

Silicon Dioxide (SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)