Man Made Object (Simulant)

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Boxwork or Septarian Concretion

Septarian nodule / Boxwork weathering

Opalite (Man-made Glass)

Fused glass (typically made of dolomite and metal opacifiers)

Cobalt Glass Slug (Cullet)

Man-made Silicate Glass with Cobalt Oxide (CoO)

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Porcelain Tile (Sandstone-look)

Man-made Ceramic (resembling Quartz-rich Sandstone)

Sea Glass

Man-made vitreous material (silica-based glass)

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

Tumbled yellow jasper or chalcedony

Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Cubic Zirconia (Man-made)

Cubic Zirconia (ZrO2) with Enamel and Metal Alloy

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Mystic Topaz

Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating

Opalite

Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)

Obsidian (Blue)

Volcanic Glass (SiO2)

Blue Cracked Quartz (Dyed Fire Crackle Quartz)

Silicon Dioxide (SiO2) with synthetic dye

Slag

Metallurgical Slag

Pink Quartz / Sea Glass

Silicon Dioxide (SiO2)

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Jade (likely Nephrite Jade based on appearance)

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

Green Agate

Silicon dioxide (SiO₂)

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Diamond / Clear Quartz / Glass paste

Carbon (Diamond) / Silicon Dioxide (Quartz)

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Goldstone

Aventurine glass (Synthetic glass with copper inclusions)

Rock crystal quartz fragments

Quartz (silicon dioxide, SiO₂)

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Blue Goldstone

Aventurine Glass

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Quartz (likely milky quartz or quartz glass-like fragment)

Quartz, silicon dioxide (SiO₂)

Rounded graywacke or sandstone cobble

Lithified clastic sandstone; likely quartz–feldspar–lithic grain aggregate in a silica or calcite matrix

Diamond

C (Native Carbon)

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Faceted clear gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests

Polished dendritic agate or jasper

Microcrystalline quartz (SiO₂), likely chalcedony with iron/manganese dendrites

Clear quartz tumbled stone

Quartz (silicon dioxide, SiO₂)

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)