Igneous Rock

Basalt

Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8

Granite

Granite (a common rock type, not a single mineral species)

Rose Quartz

Quartz (SiO₂), specifically a variety of Quartz

Rose Quartz

Rose Quartz (SiO2)

Granite Cobble/Pebble

Granite

Peridot (likely, based on color and appearance)

Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)(Si, Al)2O6 with (Ca, Na)(Al, Si)4O8

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Granite

Granite

Quartz

Silicon dioxide (SiO₂)

Basalt

Basalt

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Granite

Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)

Vesicular Basalt

Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 (Pyroxene) and (Ca,Na)Al(Al,Si)Si2O8 (Plagioclase Feldspar)

Basalt

Basalt

Diamond

Diamond (pure carbon; C)

Basalt with Weathered Surface

Basalt

Diamond

Diamond (Carbon, C)

Diamond

Diamond (carbon allotrope), C (chemical formula)

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.

Slag (Industrial Glassy Byproduct)

Anthropogenic silicate byproduct (Slag)

Nephrite Jade

Nephrite

Quartz (Druzy)

Silicon Dioxide (SiO2)

Granodiorite with Quartz Veining

Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins

Granite

Granite (composed mainly of Quartz, Feldspar, and Mica)

Quartz on Matrix

Silicon Dioxide (SiO2)

Vesicular Basalt (Pumice-like)

Vesicular Basalt

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Basalt Cobble

Vesicular Basalt (Mafic Extrusive)

Granodiorite

Granodiorite

Basalt with inclusion

Basalt (Aphanitic-Porphyritic texture)

Basalt with Scoria

Amygdaloidal Basalt / Vesicular Basalt

Granodiorite (Gneissic texture)

Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)

Basalt (Vesicular)

Basalt (Extrusive Volcanic Rock)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Gneiss

High-grade regional metamorphic rock (Foliated)

Massive Quartz with Host Rock

Silicon Dioxide (SiO2)

Basalt

Basalt (Mafic volcanic rock)

Basalt

Basalt (Mafic volcanic rock)

Basalt

Basalt

Garnetiferous Pegmatite

Pegmatite with Almandine Garnet and Muscovite

White Quartz

Silicon Dioxide (SiO2)