Man Made Object (Metalwork)

Honey calcite (likely rough cleavage fragment)

Calcite, calcium carbonate (CaCO₃)

Dark volcanic rock, likely basalt

Basalt; predominantly plagioclase feldspar, pyroxene, and minor olivine or magnetite

Likely tumbled amber or orange chalcedony

Uncertain from image; possibly amber (fossilized resin, chiefly C10H16O) or carnelian (microcrystalline quartz, SiO₂)

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Polished amber

Amber (fossilized plant resin), commonly succinite; organic mineraloid rather than a true mineral

Chalcedony (gray-white agate)

Microcrystalline quartz, SiO₂

Amethyst quartz cluster

Quartz, silicon dioxide (SiO₂), purple variety amethyst

Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Obsidian

Volcanic glass

Obsidian

Volcanic Glass

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Petrified Wood

Silicified wood (Quartz/Chalcedony)

Amethyst

Quartz (SiO2) with trace iron impurities

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Obsidian

Volcanic glass

Tiger Iron

Banded Iron Formation (BIF)

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Wood Jasper

Siliceous sedimentary rock (variety of Chert/Chalcedony)

Mookaite Jasper

Siliceous sedimentary rock (variety of Jasper/Chert)

Jasper

Silicon Dioxide (SiO2)

Jasper

Jasper (a variety of Chalcedony, SiO2)

Actinolite (likely fibrous amphibole)

Actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂; possibly an actinolite–tremolite specimen

Jade

There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.

Brown Jasper

Jasper (a cryptocrystalline variety of Quartz, SiO2)

Coral (Precious Coral)

Corallium rubrum (Red Coral), Paracorallium japonicum (Momo Coral), Pleurocorallium elatius (Sardinian Coral), various other species within the Corallidae family. Chemically, it's primarily Calcium Carbonate (CaCO 3 ).

Serpentine-rich metamorphic stone

Serpentinite, chiefly serpentine-group minerals (antigorite, lizardite, or chrysotile) with possible quartz, magnesite, and magnetite

Granite Cobble/Pebble

Granite

Red Jasper

Jasper (a cryptocrystalline variety of Quartz, SiO₂)

Honey Calcite

Calcium Carbonate (CaCO3)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Clear quartz sphere or polished quartz cabochon (tentative)

Quartz, silicon dioxide (SiO₂); appearance may also be consistent with ordinary glass, which cannot be ruled out from the image alone

Amazonite

Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)

Amazonite

Amazonite (KAlSi3O8 - a variety of Microcline Feldspar)

Lapis Lazuli (Lazurite crystals on Marble)

Lazurite / (Na,Ca)8[(S,Cl,SO4,OH)2|(AlSiO4)6]

Red jasper (iron-rich chalcedony), possibly brecciated

Jasper: microcrystalline quartz, SiO₂, colored mainly by iron oxides/hydroxides

Obsidian

Volcanic Glass (Amorphous SiO2)

Red jasper pebble

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

Rose quartz beads

Quartz, silicon dioxide (SiO₂), pink variety

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Obsidian

Volcanic Glass (Amorphous SiO2)

Obsidian

Volcanic Glass (felsic composition)

Larimar

Pectolite (NaCa2Si3O8(OH))