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 241–360 of 521 uncommon entries (page 3 of 5).
Itacolumiteuncommonsedimentary · Mohs 6-7yellow, brown, tan
Jacobsiteuncommonmineral · Mohs 6black, dark brownish-black
Jamesoniteuncommonmineral · Mohs 2.5dark gray, lead gray
Kaersutiteuncommonmineral · Mohs 5-6dark brown, black
Kaliniteuncommonmineral · Mohs 2white, colorless, gray
Kerniteuncommonmineral · Mohs 2.5-3colorless, white, gray
Kimberliteuncommonigneous · Mohs 3-5dark gray, bluish gray, greenish gray- No imageKnife River Flintuncommonmineral · Mohs 6.5-7brown, dark brown, yellowish-brown
Kröhnkiteuncommonmineral · Mohs 2.5-3blue, blue-green
Kunziteuncommongemstone · Mohs 6.5-7pink, violet, lilac
Kutnohoriteuncommonmineral · Mohs 3.5-4white, pink, brown
Laguna Agateuncommonmineral · Mohs 6.5-7red, orange, yellow
Langbeiniteuncommonmineral · Mohs 3.5-4colorless, white, gray
Langiteuncommonmineral · Mohs 2.5-3blue, blue-green
Lawsoniteuncommonmineral · Mohs 8colorless, white, bluish-gray
Lazuliteuncommonmineral · Mohs 5.5-6azure blue, blue, sky blue
Lazuriteuncommonmineral · Mohs 5-5.5blue, azure, violet-blue
Lechatelieriteuncommonmineral · Mohs 5.5-6.5colorless, white, gray
Leoniteuncommonmineral · Mohs 3colorless, white, yellow- No imageLeucopyriteuncommonmineral · Mohs 5.5-6silver-white, steel-gray
- No imageLévyne-Cauncommonmineral · Mohs 4-4.5white, colorless, yellowish
- No imageLévyne-Nauncommonmineral · Mohs 4-4.5white, colorless, yellowish
Libetheniteuncommonmineral · Mohs 4dark green, olive green, blackish green
Liebigiteuncommonmineral · Mohs 2.5yellow, yellow-green
Linariteuncommonmineral · Mohs 2.5deep blue, azure blue
Linnaeiteuncommonmineral · Mohs 4.5-5.5steel-gray, pale pinkish-gray, silver-white- No imageLintoniteuncommonmineral · Mohs 5-5.5green, yellow-green, blue-green
Lithargeuncommonmineral · Mohs 2red, orange, yellow
Lithiophiliteuncommonmineral · Mohs 4-5yellow, brownish-yellow, pink
Lode Golduncommonmineral · Mohs 2.5-3gold-yellow, brass-yellow
Löllingiteuncommonmineral · Mohs 5.5-6silver-white, steel-gray- No imageLouisiana Opaluncommonmineral · Mohs 5.5-6brown, tan, gray
Ludwigiteuncommonmineral · Mohs 5black, dark green, dark brown
Luzoniteuncommonmineral · Mohs 3.5pinkish-brown, reddish-brown, gray
Mackinawiteuncommonmineral · Mohs 2.5bronze, yellowish-brown, gray
Maghemiteuncommonmineral · Mohs 5-6brown, reddish-brown, black
Magnesio-hastingsiteuncommonmineral · Mohs 5-6dark green, brownish black, black
Magnesio-riebeckiteuncommonmineral · Mohs 5-6blue, dark blue, lavender blue
Magnesiochromiteuncommonmineral · Mohs 5.5black, brownish-black
Magnesiocopiapiteuncommonmineral · Mohs 2.5-3yellow, golden yellow
Magnesioferriteuncommonmineral · Mohs 6-6.5black
Mali Garnetuncommongemstone · Mohs 6.5-7.5yellow, green, brown
Margariteuncommonmineral · Mohs 3.5-4pink, white, yellow
Marialiteuncommonmineral · Mohs 5.5-6colorless, white, gray
Maripositeuncommonmineral · Mohs 2.5-3bright green, emerald green
Mascagniteuncommonmineral · Mohs 2.5white, yellow, gray
Mastodon Toothuncommonfossil · Mohs 3-5brown, tan, black
Matilditeuncommonmineral · Mohs 2.5-3lead-gray, black
Meioniteuncommonmineral · Mohs 5.5-6white, colorless, yellow
Melaniteuncommonmineral · Mohs 6.5-7black, dark brownish-black
Mesoliteuncommonmineral · Mohs 5white, colorless
Metacinnabaruncommonmineral · Mohs 3black, gray, brownish-black
Metatorberniteuncommonmineral · Mohs 2.5emerald green, grass green, dark green
Metazeuneriteuncommonmineral · Mohs 2-2.5emerald-green, apple-green, yellow-green
Mexican Opaluncommongemstone · Mohs 5.5-6.5orange, red, yellow
Meyerhofferiteuncommonmineral · Mohs 2white, colorless, yellowish
Milleriteuncommonmineral · Mohs 3-3.5brass-yellow, pale bronze-yellow
Mimetiteuncommonmineral · Mohs 3.5-4yellow, orange, brown
Minnesotaiteuncommonmineral · Mohs 1-2yellow, green, brown
Mitridatiteuncommonmineral · Mohs 3.5green, dark green, yellow-green
Mogániteuncommonmineral · Mohs 6gray, white, colorless
Molybditeuncommonmineral · Mohs 1-2yellow, straw-yellow, canary-yellow
Monazite-(La)uncommonmineral · Mohs 5-5.5yellowish-brown, reddish-brown, brown
Montebrasiteuncommonmineral · Mohs 5.5-6white, colorless, yellow
Monticelliteuncommonmineral · Mohs 5colorless, white, gray
Morganiteuncommongemstone · Mohs 7.5-8pink, peach, rose-pink
Mtoroliteuncommonmineral · Mohs 6.5-7apple green, dark green
Mulliteuncommonmineral · Mohs 6-7white, gray, colorless
Nacriteuncommonmineral · Mohs 2.5white, yellowish, greenish
Nahcoliteuncommonmineral · Mohs 2.5white, colorless, gray
Native Arsenicuncommonmineral · Mohs 3.5tin-white, light gray, black
Native Bismuthuncommonmineral · Mohs 2-2.5silver-white, pinkish-white, iridescent
Native Mercuryuncommonmineral · Mohs inapplicablesilver-white
Native Silveruncommonmineral · Mohs 2.5-3silver-white, tarnish to gray or black
Natroaluniteuncommonmineral · Mohs 3.5-4white, yellowish, colorless
Neotociteuncommonmineral · Mohs 3-4black, dark brown, reddish-brown
Népouiteuncommonmineral · Mohs 2.5green, yellowish-green, apple-green
Nesquehoniteuncommonmineral · Mohs 2.5white, colorless, grayish-white
Nickelineuncommonmineral · Mohs 5-5.5pale copper-red, light bronze
Nickelskutteruditeuncommonmineral · Mohs 5.5-6tin-white, silver-white, gray
Niteruncommonmineral · Mohs 2white, colorless, gray
Northupiteuncommonmineral · Mohs 3.5-4white, gray, yellow
Noseanuncommonmineral · Mohs 5-5.5gray, blue, white
Nsutiteuncommonmineral · Mohs 6-6.5dark gray, black
Nuummiteuncommonmetamorphic · Mohs 5.5-6black, dark gray
Okeniteuncommonmineral · Mohs 4.5-5white, colorless, yellowish
Oliveniteuncommonmineral · Mohs 3olive-green, yellow-green, brown
Omphaciteuncommonmineral · Mohs 5-6green, dark green, blackish-green- No imageOrange Zirconuncommongemstone · Mohs 7.5orange, reddish-orange, brownish-orange
Oregon Sunstoneuncommongemstone · Mohs 6-6.5yellow, red, green
Ottreliteuncommonmineral · Mohs 6.5dark green, black, gray-green
Ottréliteuncommonmineral · Mohs 6.5dark gray, dark green, black
Ozokeriteuncommonmineral · Mohs 1yellow, brown, black
Pachnoliteuncommonmineral · Mohs 3colorless, white, grayish
Paratacamiteuncommonmineral · Mohs 3dark green, bright green, emerald green
Pargasiteuncommonmineral · Mohs 5-6dark green, brown, black
Pearceiteuncommonmineral · Mohs 3black, dark gray
Pectoliteuncommonmineral · Mohs 4.5-5white, gray, pale green- No imagePentahydriteuncommonmineral · Mohs 2white, colorless, pale yellow
Perovskiteuncommonmineral · Mohs 5.5black, brown, yellow- No imagePeruvian Blue Opaluncommongemstone · Mohs 5.5-6.5blue, teal, blue-green
Petaliteuncommonmineral · Mohs 6-6.5colorless, white, gray
Petrified Cycaduncommonfossil · Mohs 6.5-7brown, tan, black
Petrified Dinosaur Boneuncommonfossil · Mohs 6.5-7red, brown, yellow
Pharmacoliteuncommonmineral · Mohs 2-2.5white, colorless, grayish
Pharmacosideriteuncommonmineral · Mohs 2.5yellow, green, brown
Phosphosideriteuncommonmineral · Mohs 3.5-4pink, violet, magenta
Pickeringiteuncommonmineral · Mohs 1.5-2colorless, white, yellowish- No imagePiedmontiteuncommonmineral · Mohs 6-7red, reddish-brown, pink
Piemontiteuncommonmineral · Mohs 6-6.5red, reddish-brown, pink
Pietersiteuncommonmineral · Mohs 6.5-7blue, gold, brown- No imagePink Beryluncommongemstone · Mohs 7.5-8pink, peach, magenta
- No imagePink Chalcedonyuncommonmineral · Mohs 6.5-7pink, rose, light pink
Pink Corundumuncommongemstone · Mohs 9pink, magenta- No imagePink Garnetuncommonmineral · Mohs 6.5-7.5pink, purplish-pink, rose-red
- No imagePink Serpentineuncommonmineral · Mohs 2.5-5.5pink, lavender, rose
- No imagePink Tourmalineuncommongemstone · Mohs 7-7.5pink, magenta, rose
- No imagePisaniteuncommonmineral · Mohs 2blue, blue-green
Pitticiteuncommonmineral · Mohs 2-3yellow, brown, yellowish-brown
Plancheiteuncommonmineral · Mohs 5.5-6blue, light blue, dark blue
Hunt the unusual
Open RockHoundR to find mapped spots and log finds wherever they show up.
