Mineral Based Human Made Alloy

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Sandstone

Arenite (SiO2 based with various mineral cements)

Limonite (Iron Stone)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

N/A (This is a digital image of a bar graph)

Digital Data Visualization (Bar Chart)

Human Skin (Epidermis/Dermis)

Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)

Gold Mineral

Native Gold (Au)

Orange Quartzite / Carnelian Agate

Silicon Dioxide (SiO2)

Basalt

Basalt (comprising Plagioclase feldspar, Pyroxene, and Olivine)

Granodiorite

Granodiorite

Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)

Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)

Beryllonite

Beryllonite (NaBePO4)

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.

Coquina

Bioclastic Limestone (Coquina)

Diamond Plate (Steel)

Alloyed Carbon Steel or Aluminum with 'Durbar' pattern

Sandstone

Arenite (SiO2 based with various mineral cements)

Arsenopyrite

Arsenopyrite (FeAsS)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Blue Sapphire (in a faceted jewelry setting)

Corundum (Al2O3) with trace Iron and Titanium

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Blue Goldstone

Goldstone (artificial glass)

Coquina

Biogenic Limestone (mostly Calcium Carbonate, CaCO3)

Native Copper

Native Copper (Cu)

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Unknown Organic Object (likely a berry or fruit)

Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.

Greenstone (Greenschist facies)

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Silver (Native Element / Alloy)

Silver (Ag)

Sandstone

Arenite (primarily SiO2)

Blue Topaz (specifically London Blue shade)

Topaz - Al2SiO4(F,OH)2

Sandstone Beach Pebble

Clastic sedimentary rock (SiO2 with iron oxide cement)

Moss Agate

Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)

Aquamarine (Pale variety)

Beryl (Be3Al2Si6O18)

Bismuth

Bismuth (element Bi) with oxidized thin-film interference layer

Michigan Float Copper

Native Copper (Cu)

Diamond (Princess Cut Faceted Gemstone)

Native Carbon (C)

Rose Quartz

Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese

Chrysocolla in Matrix

Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O

Banded Calcite (often sold as 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

Amazonite

Amazonite (KAlSi3O8)

Chert (Common Chert)

Cryptocrystalline Quartz (SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)