Man Made Object (Simulant)

Browse man made object (simulant) specimens identified by the Rock Identifier community.

Agate (various color varieties)

SiO₂ (Silicon Dioxide)

Mineral (specifically a variety of Chalcedony, which is a microcrystalline quartz)

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Mineral

Granite Cobble/Pebble

Granite

Igneous

Marble

Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)

metamorphic

Rose Quartz

Rose Quartz (SiO₂)

Mineral

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Mineral

Rose Quartz

Rose Quartz (SiO₂)

Mineral

Rose Quartz

Rose Quartz (SiO2)

Mineral

Bivalve Shell (Fossil or Contemporary)

Class Bivalvie (various genera and species of clams, cockles, etc.)

Sedimentary (Biogenic sediment or biological remain)

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Mineral

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

sedimentary

Jasper

Silicon Dioxide (SiO2)

Mineral

Red Coral

Corallium rubrum (for precious red coral), although other species like Corallium japonicum and Paracorallium are also used.

Organic Gemstone (not a rock or mineral in the traditional sense, but bio-mineralized material)

Red Chalcedony (likely dyed)

Chalcedony (a variety of Quartz), SiO2

Mineral (Cryptocrystalline Quartz)

Smoky Quartz

SiO2 (Silicon Dioxide)

mineral

Tiger's Eye

Tiger's Eye (a variety of Quartz, SiO₂)

Mineral (specifically a gemstone variety)

Calcite

Calcite (CaCO 3)

Mineral

Dyed Howlite (simulating Lavender/Purple Jade or Charoite)

Howlite: Ca2B5SiO9(OH)5 (when natural)

Mineral

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Mineral

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)

sedimentary

Bloodstone

Heliotrope (a variety of Chalcedony, SiO₂ with inclusions)

Metamorphic Rock

Amethyst

Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities

Mineral

Onyx (beads)

SiO2 (Cryptocrystalline Quartz)

Mineral

Peridot

Olivine (Mg,Fe)2SiO4

Mineral

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

mineral (man-enhanced)

Titanium Coated Aura Quartz (Apple Aura Quartz)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating

Mineral (Man-modified)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

Mineral

Unakite

Epidote-Feldspar rock

Metamorphic Rock

Aventurine (likely Green Aventurine)

Silicon Dioxide (SiO2) with included minerals (Fuchsite for green)

Metamorphic Rock / Mineral (Quartz Variety)

Cullet Glass (Industrial Slag Glass)

Amorphous Silica (SiO2) with metallic oxide impurities

Man-made byproduct (often mistaken for Obsidian or Emerald)

Chert / Flint

Chert (varieties include Flint)

Sedimentary

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Mineral (specifically a cryptocrystalline variety of Quartz)

Diamond

Diamond (pure carbon, C)

Mineral

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.

Mineral

Jasper and Aquamarine (likely)

Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))

Sedimentary (Jasper), Mineral (Aquamarine)

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz

Mineral

Agate

Chalcedony (cryptocrystalline quartz)

Mineral

Citrine

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

mineral

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)₈[(S,Cl,SO₄,OH)₂|(Al₆Si₆O₂₄)], with varying amounts of Calcite, Pyrite, and Sodalite.)

Mineral

Quartz (Pebble)

Quartz (SiO₂)

Mineral

Glazed Ceramic Tile

Fused Silicate-Clay composite

Synthetic (Man-made material mimicking natural stone)

Green Aventurine

Aventurine Quartz (SiO2 with fuchsite inclusions)

Mineral