Uncommon rocks & minerals
Uncommon rocks and minerals require effort to locate: a specific locality, a knowledgeable dealer, or patience at a known dig. Many become staples of a serious cabinet once you have a few good specimens.
Showing 121–240 of 521 uncommon entries (page 2 of 5).
Cristobaliteuncommonmineral · Mohs 6.5white, colorless, gray
Cubaniteuncommonmineral · Mohs 3.5-4brass-yellow, bronze-yellow
Cummingtoniteuncommonmineral · Mohs 5-6brown, gray, greenish-gray
Cyanotrichiteuncommonmineral · Mohs 2sky-blue, azure-blue
Danburiteuncommonmineral · Mohs 7-7.5colorless, white, yellow- No imageDatolite Noduleuncommonmineral · Mohs 5-5.5white, yellow, green
Dawsoniteuncommonmineral · Mohs 3white, colorless, gray
Descloiziteuncommonmineral · Mohs 3-3.5red, brown, orange
Devillineuncommonmineral · Mohs 2.5blue, greenish-blue, emerald-green
Diadochiteuncommonmineral · Mohs 3yellow, brown, orange
Diasporeuncommonmineral · Mohs 6.5-7white, gray, colorless
Digeniteuncommonmineral · Mohs 2.5-3dark blue, black, bluish black
Dinosaur Coproliteuncommonfossil · Mohs 3-5brown, tan, black
Dioptaseuncommonmineral · Mohs 5emerald-green, bluish-green
Djurleiteuncommonmineral · Mohs 2.5-3lead-gray, dark blue, black
Domeykiteuncommonmineral · Mohs 3-3.5tin-white, silver-white, yellowish- No imageDry Head Agateuncommonmineral · Mohs 6.5-7red, orange, yellow
Dryhead Agateuncommonmineral · Mohs 6.5-7red, orange, yellow
Dufréniteuncommonmineral · Mohs 3.5-4.5dark green, blackish green, olive green
Duftiteuncommonmineral · Mohs 3.5green, yellow-green, gray-green
Dumortieriteuncommonmineral · Mohs 7-8.5blue, violet-blue, reddish-brown
Dundasiteuncommonmineral · Mohs 3.5-4white, pale yellow, pale green
Dypingiteuncommonmineral · Mohs 2.5white, colorless, pale blue
Echinoid Geodeuncommonfossil · Mohs 7gray, white, clear
Edeniteuncommonmineral · Mohs 5-6green, brown, white
Elpiditeuncommonmineral · Mohs 5.5white, colorless, gray
Emplectiteuncommonmineral · Mohs 2lead-gray, tin-white
Enargiteuncommonmineral · Mohs 3grayish-black, iron-black- No imageEndelliteuncommonmineral · Mohs 2-2.5white, yellowish, gray
- No imageEnhydrosuncommonmineral · Mohs 7colorless, white, brown
Eosphoriteuncommonmineral · Mohs 5pink, brown, yellow
Epistilbiteuncommonmineral · Mohs 4-5white, colorless, yellowish
Erionite-Kuncommonmineral · Mohs 3.5-4white, colorless, pale yellow
Erythriteuncommonmineral · Mohs 1.5-2.5crimson, peach-red, pink
Ettringiteuncommonmineral · Mohs 2colorless, white, yellow
Eudialyteuncommonmineral · Mohs 5-6red, pink, brown
Eurypteriduncommonfossilbrown, black, tan
Euxeniteuncommonmineral · Mohs 5.5-6.5black, brownish-black, reddish-brown
Evansiteuncommonmineral · Mohs 3.5-4colorless, white, bluish
Faden Quartzuncommonmineral · Mohs 7white, colorless
Fairfielditeuncommonmineral · Mohs 3.5white, yellow, colorless
Famatiniteuncommonmineral · Mohs 3.5copper-red, reddish-gray
Fayaliteuncommonmineral · Mohs 6.5-7yellow, yellow-green, brown
Ferberiteuncommonmineral · Mohs 4-4.5black, brownish-black- No imageFerrierite-Kuncommonmineral · Mohs 3-3.5white, colorless, yellowish
Ferro-actinoliteuncommonmineral · Mohs 5-6dark green, black, brownish-green
Ferro-anthophylliteuncommonmineral · Mohs 5.5-6brown, greenish-brown, dark gray
Ferro-edeniteuncommonmineral · Mohs 5-6black, dark brown, dark green- No imageFerro-ferri-hornblendeuncommonmineral · Mohs 5-6black, dark green, dark brown
Ferro-pargasiteuncommonmineral · Mohs 5-6black, dark green, dark brown
Ferro-tschermakiteuncommonmineral · Mohs 5-6dark green, black
Ferroceladoniteuncommonmineral · Mohs 2blue-green, green
Fibroferriteuncommonmineral · Mohs 2.5yellow, white, greenish-yellow
Fire Agateuncommongemstone · Mohs 6.5-7red, brown, orange
Fire Opaluncommongemstone · Mohs 5.5-6.5red, orange, yellow
Florencite-(Ce)uncommonmineral · Mohs 5-6yellow, brown, pink
Fluor-schorluncommonmineral · Mohs 7-7.5black, brownish-black
Fluor-uviteuncommonmineral · Mohs 7brown, yellow-brown, dark green- No imageFluorapophyllite-(Na)uncommonmineral · Mohs 4.5-5white, colorless, pink
Fluoro-riebeckiteuncommonmineral · Mohs 5-6blue, dark blue, blue-black
Fluoro-tremoliteuncommonmineral · Mohs 5-6white, colorless, pale green
Fluorophlogopiteuncommonmineral · Mohs 2.5-3colorless, white, yellow
Fossil Insectuncommonfossil · Mohs 1-3brown, amber, black
Fossilized Ivoryuncommonfossil · Mohs 2.5-3white, cream, yellow
Frankliniteuncommonmineral · Mohs 5.5-6.5black, brownish-black
Fulguriteuncommonmineral · Mohs 6.5-7white, gray, tan
Gahniteuncommonmineral · Mohs 7.5-8dark green, blue-green, yellow
Gastrolithsuncommonfossil · Mohs variablevariable, brown, gray
Gaylussiteuncommonmineral · Mohs 2.5-3colorless, white, gray
Gedriteuncommonmineral · Mohs 5-6brown, gray, green
Gehleniteuncommonmineral · Mohs 5.5-6gray, yellowish-brown, white- No imageGemstonesuncommongemstone · Mohs 1-10various
- No imageGenthiteuncommonmineral · Mohs 2-3green, yellowish-green, apple-green
Gersdorffiteuncommonmineral · Mohs 5.5silver-white, steel-gray, blackish-gray
Gismondine-Cauncommonmineral · Mohs 4-5white, colorless, gray
Gmelinite-Cauncommonmineral · Mohs 4.5white, colorless, pink
Gmelinite-Nauncommonmineral · Mohs 4.5white, colorless, pink
Gold Nuggetuncommonmineral · Mohs 2.5-3gold-yellow, pale-yellow, orange-yellow- No imageGold-laced Jadeuncommonmineral · Mohs 6-6.5white, green, yellow
Golden Beryluncommongemstone · Mohs 7.5-8yellow, golden yellow, yellow-green
Gonnarditeuncommonmineral · Mohs 5white, colorless, yellow
Gorceixiteuncommonmineral · Mohs 4.5-5.5white, colorless, yellow
Goyaziteuncommonmineral · Mohs 5colorless, white, yellow- No imageGrahamiteuncommonmineral · Mohs 2black
- No imageGreen Beryluncommongemstone · Mohs 7.5-8green, yellowish-green, bluish-green
Green Quartzuncommongemstone · Mohs 7green, leek-green, yellow-green
Greenaliteuncommonmineral · Mohs 3-4olive-green, brownish-green, blackish-green
Greigiteuncommonmineral · Mohs 4-4.5black, gray
Gudmunditeuncommonmineral · Mohs 6silver-white, steel-gray, creamy-white
Gyroliteuncommonmineral · Mohs 3-4white, yellowish, greenish
Harmotomeuncommonmineral · Mohs 4.5white, gray, yellowish
Hastingsiteuncommonmineral · Mohs 5-6black, dark green, dark brown
Hausmanniteuncommonmineral · Mohs 5-5.5black, brownish-black
Hectoriteuncommonmineral · Mohs 1-2white, gray, pink
Helvineuncommonmineral · Mohs 6-6.5yellow, yellowish-brown, reddish-brown
Hercyniteuncommonmineral · Mohs 7.5-8black, dark green
Hetaeroliteuncommonmineral · Mohs 6black, dark brown
Heterogeniteuncommonmineral · Mohs 3-4black, brownish-black, reddish-brown
Heterositeuncommonmineral · Mohs 4-5purple, violet, dark red- No imageHeulandite-Kuncommonmineral · Mohs 3.5-4white, colorless, pink
Hisingeriteuncommonmineral · Mohs 3black, brown, greenish-black
Hollanditeuncommonmineral · Mohs 6black, dark gray- No imageHorse Mountain Agateuncommonfossil · Mohs 6.5-7red, orange, yellow
Hübneriteuncommonmineral · Mohs 4-4.5reddish-brown, brown, black- No imageHuebneriteuncommonmineral · Mohs 4-4.5red, reddish-brown, brownish-black
Humiteuncommonmineral · Mohs 6-6.5yellow, brown, orange
Hureauliteuncommonmineral · Mohs 3.5orange, pink, yellow
Hyalite Opaluncommonmineral · Mohs 5.5-6.5colorless, white, yellowish- No imageHyalite Opal Geodeuncommonmineral · Mohs 5.5-6.5colorless, white, yellow
Hydroboraciteuncommonmineral · Mohs 4white, colorless, gray
Hydroniumjarositeuncommonmineral · Mohs 2.5-3.5yellow, brownish-yellow, ochre-yellow
Ilsemanniteuncommonmineral · Mohs 1-2blue, black, dark gray
Ilvaiteuncommonmineral · Mohs 5.5-6black, brownish-black
Imogoliteuncommonmineral · Mohs 1white, colorless, pale yellow
Impactiteuncommonsedimentary · Mohs 5-7black, brown, green
Inderiteuncommonmineral · Mohs 2.5-3white, colorless, yellowish
Indicoliteuncommongemstone · Mohs 7-7.5blue, indigo, blue-green
Inesiteuncommonmineral · Mohs 5.5-6pink, reddish-pink, brownish-pink
Inyoiteuncommonmineral · Mohs 2colorless, white
Iron Meteoriteuncommonfossil · Mohs 4-5metallic gray, brown, black
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