Metamorphic (Altered Igneous Rock)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Pink Granite / Gneiss

Felsic Plutonic Rock (Granite) with Gneissic banding

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sodalite (blue beads) and Clear Quartz (clear beads)

Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2

Dalmatian Jasper

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

River Rock (Granitic Gneiss)

Foliated Granitic Gneiss

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Granite Gneiss

Gneiss (derived from granitic protolith)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Pyrite

Pyrite (Iron Disulfide), FeS2

Citrine

Citrine (Silicon Dioxide - SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Granite

Granite

Granite

Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Corundum

Corundum (Al2O3)

Aventurine

Quartz (Aventurine variety)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartzite (Yellow/Orange variety)

Quartzite (primarily SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Banded Slate

Slate (Metamorphosed Siltstone/Mudstone)

Calcite (Yellow/Orange variety - sometimes called Honey Calcite)

Calcite

Drill Core Samples (Varied Lithology)

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

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

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.

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Quartz

Quartz (SiO₂)

Quartz with Mica Schist (Pegmatite Specimen)

SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)

Labradorite (tumbled)

Labradorite (a plagioclase feldspar mineral between anorthite and albite; chemical formula: (Ca,Na)(Si,Al)4O8)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)