⚲ Rock Identification
Post photos for community ID help
31 posts
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Apatite: a hardness reference point that comes in surprising colors
by GemProspector15
Novice
· Posted Jul 12, 2026
· Active just now
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Calcite: soft, reactive, and sometimes double vision
by GraniteProspector41
Novice
· Posted Jul 12, 2026
· Active just now
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Opal: where the color actually comes from, and why it can crack
by ObsidianHawk11
Novice
· Posted Jul 12, 2026
· Active just now
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Tourmaline: one mineral group, an enormous range of colors
by VeinKing36
Novice
· Posted Jul 12, 2026
· Active 1m ago
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Fossilized shark teeth: a beginner friendly, genuinely abundant fossil
by 506993
Novice
· Posted Jul 12, 2026
· Active 1m ago
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Diamond field identification: what actually works, and what does not
by RockNomad28
Novice
· Posted Jul 12, 2026
· Active 1m ago
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Garnet: more than one mineral hiding under one name
by CrystalKing26
Novice
· Posted Jul 12, 2026
· Active 2m ago
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Spinel: the great imitator that fooled royalty
by MicaNomad80
Novice
· Posted Jul 12, 2026
· Active 2m ago
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Hematite and magnetite: both iron ores, only one is strongly magnetic
by CrystalKing27
Novice
· Posted Jul 12, 2026
· Active 2m ago
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Topaz: a hard stone with one real weakness
by BasaltSmith67
Novice
· Posted Jul 12, 2026
· Active 2m ago
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Fluorite: the mineral that gave fluorescence its name
by CobaltSage48
Novice
· Posted Jul 12, 2026
· Active 3m ago
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Agate versus jasper: the translucency test
by GemQueen95
Novice
· Posted Jul 12, 2026
· Active 3m ago
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Petrified wood: how a tree becomes stone
by BasaltNomad62
Novice
· Posted Jul 12, 2026
· Active 3m ago
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Carnelian and onyx: two names that get misused constantly
by BoulderFox54
Novice
· Posted Jul 12, 2026
· Active 3m ago
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Beryl family: aquamarine, morganite, and emerald under one name
by BoulderDigger56
Novice
· Posted Jul 12, 2026
· Active 3m ago
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Jade: nephrite and jadeite are two different minerals
by VeinChaser66
Novice
· Posted Jul 12, 2026
· Active 3m ago
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Identifying quartz: the most common mineral you will find
by MineralHound86
Novice
· Posted Jul 12, 2026
· Active 3m ago
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Galena and sphalerite: the classic ore pair
by SlateKing53
Novice
· Posted Jul 12, 2026
· Active 3m ago
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Amethyst and citrine: same mineral, different color, and a real trade secret
by CobaltScout46
Novice
· Posted Jul 12, 2026
· Active 4m ago
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Pyrite in depth: crystal habit, and a real conservation problem
by CanyonCracker14
Novice
· Posted Jul 12, 2026
· Active 4m ago
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Corundum: ruby, sapphire, and the second hardest natural mineral
by VeinQueen99
Novice
· Posted Jul 12, 2026
· Active 4m ago
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Rhodochrosite and rhodonite: similar names, similar color, different minerals
by GoldFinder12
Novice
· Posted Jul 12, 2026
· Active 4m ago
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IDENTIFICATION
Found this on my Arizona ranch — dense, heavy, reddish-brown. Iron meteorite?
by rockfan_jake
Rock Hound
· Posted Jun 09, 2026
· Active 5m ago
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Ammonites: extinct cephalopods with a genuinely useful dating tool
by BasaltSage27
Novice
· Posted Jul 12, 2026
· Active 5m ago
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Sodalite and lapis lazuli: blue stones that are often mixed up
by BoulderNomad15
Novice
· Posted Jul 12, 2026
· Active 5m ago
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