Mineralati

Identify Any Rock, Mineral or Crystal from a Photo

Discover rocks, minerals, gemstones and fossils. Upload a photograph to explore what you’ve found.

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Photos are used only to generate your result and are deleted automatically. Results are possible matches, not laboratory confirmation.

Identify a Specimen Explore Geological Database

Browse geological categories

A specimen can belong to more than one category: amethyst, for example, is a mineral variety, a crystal and a gemstone.

Rocks

Igneous, sedimentary and metamorphic aggregates of minerals.

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Minerals

Naturally occurring crystalline solids with a defined chemistry.

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Crystals

Well-formed specimens that show their internal symmetry.

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Gemstones

Minerals and varieties valued for beauty and durability.

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Fossils

Preserved remains and traces of ancient life.

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Meteorites

Rocks and metal that fell to Earth from space.

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Popular minerals

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Amethyst

Formula: SiO2
Mohs: 7
Colour: Purple

Azurite

Formula: Cu3(CO3)2(OH)2
Mohs: 3.5–4
Colour: Deep blue

Calcite

Formula: CaCO3
Mohs: 3
Colour: Colourless, white, many tints

Diamond

Formula: C
Mohs: 10
Colour: Colourless to varied

Feldspar

Formula: (K,Na,Ca)AlSi3O8 group
Mohs: 6–6.5
Colour: White, pink, grey

Fluorite

Formula: CaF2
Mohs: 4
Colour: Purple, green, blue, yellow, colourless

Garnet

Formula: X3Y2(SiO4)3 group
Mohs: 6.5–7.5
Colour: Red, brown, green, others

Gold

Formula: Au
Mohs: 2.5–3
Colour: Golden yellow

Popular gemstones

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Emerald

Formula: Be3Al2Si6O18
Mohs: 7.5–8
Colour: Green

Ruby

Formula: Al2O3
Mohs: 9
Colour: Red

Sapphire

Formula: Al2O3
Mohs: 9
Colour: Blue and other non-red colours

Turquoise

Formula: CuAl6(PO4)4(OH)8·4H2O
Mohs: 5–6
Colour: Blue to green

Common rocks

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Basalt

Mohs: 5–6
Colour: Dark grey to black

Gneiss

Colour: Banded light/dark

Granite

Mohs: 6–7
Colour: Light coloured with dark speckles

Limestone

Formula: CaCO3 dominant
Mohs: 3–4
Colour: White to grey

Marble

Formula: CaCO3 recrystallised
Mohs: 3–4
Colour: White, coloured veining

Obsidian

Formula: Mostly SiO2 glass
Mohs: 5–5.5
Colour: Black, dark

Sandstone

Colour: Variable

Slate

Colour: Grey, green, purple, black

Fossils and meteorites

Ammonite

Petrified Wood

Formula: SiO2 replacement common
Mohs: 7
Colour: Variable wood colours

Trilobite

Allende

Colour: Dark grey

Canyon Diablo

Formula: Fe-Ni metal dominant
Colour: Metallic grey

Sikhote-Alin

Formula: Fe-Ni
Colour: Metallic

Recently added

Sikhote-Alin

Formula: Fe-Ni
Colour: Metallic

Allende

Colour: Dark grey

Canyon Diablo

Formula: Fe-Ni metal dominant
Colour: Metallic grey

Petrified Wood

Formula: SiO2 replacement common
Mohs: 7
Colour: Variable wood colours

Ammonite

Trilobite

Conglomerate

Colour: Variable

Schist

Colour: Silvery to varied

Identification guides

All guides

Gemstone Identification

Optical and physical clues—without unsupported authenticity claims from photos alone.

Crystal Identification

Habit, system and surface features.

Rock Types

Igneous, sedimentary and metamorphic rocks at a glance.

Mineral Colour Chart

Why colour helps—and when it misleads.

Mohs Hardness Scale

Talcreference scale from 1 (talc) to 10 (diamond).

How to Identify Minerals

A practical sequence: lustre, colour, streak, hardness, cleavage and habit.

Popular comparisons

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How identification works

1. Upload. A vision model describes colour, texture, habit and lustre in your photo.
2. Match. Candidate names are checked against the curated database, which is the source of truth for properties.
3. Confirm. Use the listed tests, such as hardness, streak and magnetism, to narrow the answer yourself.