Man Made Object (Metalwork)

Optical Calcite

Calcite (Calcium Carbonate, CaCO3)

Weathered limestone pebble

Limestone, chiefly calcite (CaCO₃)

Petrified Wood

Silicified wood (primarily SiO2)

Jadeite Jade

Jadeite (NaAlSi2O6)

Fossil bivalve shell

Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features

Diamond (in a gold ring)

Diamond (pure carbon, C)

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Dark glassy pebble, possibly volcanic rock

Likely basalt or volcanic glass (var. obsidian), unconfirmed from image

Obsidian Arrowhead Replica (or similar knapped stone)

Obsidian (volcanic glass) or Chert

Likely fossilized shell or carbonate concretion

Indeterminate biogenic calcium carbonate, commonly calcite (CaCO₃)

Banded Calcite or Travertine

Calcium Carbonate (CaCO3)

Small white mineral fragment

Indeterminate; possibly quartz, calcite, or feldspar

Diamond

Carbon (C)

Iron meteorite fragment

Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment

Petrified Wood

Silicified Wood (SiO2)

Garnet

Group of silicate minerals (e.g., Almandine: Fe3Al2(SiO4)3)

Granodiorite

Granodiorite

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)

Pearl

Calcium Carbonate (Aragonite/Calcite) with Conchiolin, CaCO3

Diamond (in a jewelry setting)

Diamond (Carbon, C)

Quartz pebble or seed/crumb

SiO2 (if quartz)

Optical Calcite

Calcium Carbonate (CaCO3)

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Quartz pebble in concrete

Quartz (SiO₂), embedded in Portland-cement concrete

Polished blue-green glassy slag or coated mineral fragment

Most likely man-made colored glass/slag; exact composition cannot be determined visually

Blue goldstone beads

Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli

Jade (likely Nephrite Jade based on appearance)

Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)

Chelyabinsk Meteorite

Ordinary chondrite (LL5)

Gastly (Trick or Trade Halloween Series)

Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)

Diamond (or Diamond Simulant)

Carbon (C)

Orange Calcite

Calcite (CaCO3)

Greenstone Celt (Polished Stone Axe)

Metamorphosed mafic rock (often Basalt or Diabase)

Diamond (in jewelry setting)

Diamond (C - Carbon)

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Fossil gastropod shell

Fossilized marine gastropod; exact genus/species requires locality and examination

Polished orbicular/porphyritic granite or breccia

Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image

Polished orbicular stone, likely granite or diorite

Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite

Nephrite Jade

Nephrite

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Diamond

Native Carbon (C)

Diamond (in a jewelry setting)

Carbon (C)