The Rockhound dictionary
1,043 minerals, gem varieties, rocks, fossils, meteorites, organic gems, and lapidary materials, with how to tell them apart. Shared by everyone who uses Rockhound: pick one of these names when you add a specimen, and its properties fill themselves in.
96 entries fit.
A
- AmphiboliteRock
- AndesiteRock
- AnorthositeRock
- AnthraciteRock
- Apache tearsRock · H 5–5.5
- ApliteRock
- ArkoseRock
- Augen gneissRock
B
- Banded iron formationRock
- BasaltRock
- Bituminous coalRock
- BlueschistRock
- BrecciaRock
C
- CarbonatiteRock
- Chalk ⚠️Rock
- ChertRock · H 6.5–7
- ClaystoneRock
- ConcretionRock
- ConglomerateRock
- CoquinaRock
D
E
- EclogiteRock
F
- FlintRock · H 6.5–7
- Fossiliferous limestoneRock · H 3–4
- Fuchsite schistRock
- Fulgurite ⚠️Rock
G
- GabbroRock
- Garnet schistRock
- GneissRock
- GraniteRock
- GranodioriteRock
- GranuliteRock
- GreenschistRock
- GreywackeRock
H
- HornfelsRock
I
- IgnimbriteRock
- IronstoneRock
J
- JasperoidRock · H 6.5–7
K
- KimberliteRock
- KomatiiteRock
L
- Lapis lazuliRock · H 5–5.5
- LarvikiteRock · H 6–6.5
- Lignite ⚠️Rock
- LimestoneRock · H 3–4
M
- Mahogany obsidianRock · H 5–5.5
- MarbleRock · H 3–4
- Mica schistRock
- MigmatiteRock
- MonzoniteRock
- MudstoneRock
- MyloniteRock
N
- NoriteRock
O
- ObsidianRock · H 5–5.5
- Oil shaleRock
- Oolitic limestoneRock · H 3–4
P
- PegmatiteRock
- PeridotiteRock
- PhonoliteRock
- PhosphoriteRock
- PhylliteRock
- PitchstoneRock
- PorphyryRock
- PuddingstoneRock
- PumiceRock
- PyroxeniteRock
Q
- Quartz areniteRock
- QuartziteRock · H 7
R
- Rainbow obsidianRock · H 5–5.5
- RhyoliteRock
- Rock gypsumRock · H 1.5–2
- Rock salt ⚠️Rock · H 2–2.5
S
- SandstoneRock
- SchistRock
- ScoriaRock
- Septarian noduleRock
- Serpentinite ⚠️Rock
- ShaleRock
- SiltstoneRock
- SkarnRock
- SlateRock
- Snowflake obsidianRock · H 5–5.5
- Soapstone ⚠️Rock · H 1–2.5
- SyeniteRock
T
- TonaliteRock
- TrachyteRock
- TravertineRock · H 3–4
- TufaRock
- TuffRock
U
- UnakiteRock · H 6–7
V
- VerditeRock
- Volcanic bombRock
The dictionary's figures are typical ones, and specimens vary. ⚠️ marks entries with a caution (toxic, radioactive, or easily damaged): open one to see what to do.