Metamorphic Rock (Primarily Composed Of Minerals)

Rough Apatite in Matrix

Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

Tiger Iron

Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)

Dalmatian Stone

Dalmatian Jasper (actually a Peralkaline Igneous Rock)

Sandstone

Arenite (SiO2 based)

Lapis Lazuli

Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Serpentinite

Serpentinite (composed primarily of minerals in the Serpentine group)

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.

Sandstone

Clastic sedimentary rock (primarily SiO2)

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Slate

Foliated Metamorphic Rock (primarily composed of Muscovite, Chlorite, and Quartz)

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Quartzite Pebble

Metamorphic rock primarily composed of Silicon Dioxide (SiO2)

Lapis Lazuli

Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Sandstone

Arenite

Banded Gneiss

Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Quartzite

Quartzite (Metamorphic rock composed primarily of quartz)

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

Gneiss (specifically Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)

Sandstone

Arenite

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Granite

Granite

Granite Pebble

Phaneritic intrusive igneous rock

Lapis Lazuli

Lapis Lazuli (Complex silicate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli (Tumbled)

Lazurite-dominated contact metamorphic rock

Lapis Lazuli

Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)

Muscovite Schist

Metamorphic rock primarily composed of quartz and muscovite mica

Dalmation Stone

Peralkaline Rock (SiO2 with Arfvedsonite)

Sandstone

Arenite (SiO2 primarily)

Sandstone (Ferruginous)

Arenite (Fe2O3 enriched)

Sandstone

Arenite

Lapis Lazuli

Lazurite (primary mineral component), (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Marble

Metamorphic Limestone (CaCO3)

Chakra Crystal Bracelet

Mixed Mineral Assortment

Unakite

Epidotized Granite

Granite

Granite (Felsic Plutonic Rock)

Granite / Gneiss (Felsic Metamorphic or Igneous Rock)

Gneiss (or weathered Granite)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)