Granite

Unakite

Epidotized Granite

Unakite

Epidotized Granite

Unakite

Epidotized Granite

Unakite (Tumbled)

Epidotized Granite

Unakite

Epidotized Granite

Pink Granite

Granite (Phaneritic intrusive rock rich in K-feldspar)

Pink Granite

Phaneritic Plutonic Felsic Rock (K-feldspar rich)

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Pink Granite

Phaneritic plutonic igneous rock (Alkali-feldspar granite)

Tan Brown Granite

Phaneritic Biotite-Feldspar Granite

Diorite

Diorite (intermediate intrusive igneous rock)

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Pegmatitic Granite

Granite (Alkali-feldspar granite) with Quartz and Orthoclase

Granite River Pebble

Phaneritic Granite (primarily Quartz, Feldspar, and Mica)

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Granite with Mafic Inclusions

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

Granite (specifically Pink or Red Granite)

Phaneritic Felsic Igneous Rock (Granite)

Diorite

Phaneritic intermediate plutonic rock

Granodiorite

Granodiorite (Na,Ca)(Al,Si)4O8

Granite Pebble

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

Granodiorite

Phaneritic Plutonic Rock - Granodiorite

Granodiorite Core

Granodiorite

Granodiorite with Biotite Mica

Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite Mica)

Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite)

Orbicular Quartz Diorite / Tonalite

Granite Pebble

Phaneritic Felsic Igneous Rock

Smoky Quartz in Matrix

Silicon Dioxide (SiO2)

Biotite (Mica)

K(Mg,Fe)3AlSi3O10(OH,F)2

Granite (Dioritic or Hornblende-rich)

Phaneritic Plutonic Felsic to Intermediate Igneous Rock

Pink Granite (Crystalline Granite)

Igneous Intrusive Rock (Felsic Plutonic)

Granite Cobble

Granite (Felsic Intrusive)

Granodiorite

Granodiorite (containing Quartz, Plagioclase, Orthoclase, Biotite/Hornblende)

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Quartz

Silicon Dioxide (SiO2)

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.

Unakite

Unakite (Epidotized Granite)

Unakite

Unakite (Epidotized Granite)

Granite (likely a river or beach pebble)

Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)

Granitic Sand

Detrital sediment (predominantly Quartz, Feldspar, and Mica)

Smoky Quartz

Silicon Dioxide (SiO2)

Granite (phaneritic background) with Limestone/Calcite carving

Felsic Igneous Plutonic Rock (background) / Calcium Carbonate (CaCO3) (carving)