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 361–480 of 521 uncommon entries (page 4 of 5).
Plumbogummiteuncommonmineral · Mohs 4-5colorless, white, gray
Plumbojarositeuncommonmineral · Mohs 2.5-3.5yellow, yellowish-brown, brown- No imagePlumositeuncommonmineral · Mohs 2.5lead-gray, black
Polluciteuncommonmineral · Mohs 6.5colorless, white, gray
Polybasiteuncommonmineral · Mohs 2-3black, iron-black
Polylithioniteuncommonmineral · Mohs 2.5-3colorless, white, pale pink
Posnjakiteuncommonmineral · Mohs 2-3blue, greenish-blue
Potassic-hastingsiteuncommonmineral · Mohs 5-6black, dark green
Powelliteuncommonmineral · Mohs 3.5yellow, brown, greenish-yellow
Praseuncommonmineral · Mohs 7leek-green, olive-green
Priceiteuncommonmineral · Mohs 3-3.5white, grayish, yellowish- No imageProberiteuncommonmineral · Mohs 3.5white, colorless, gray
Probertiteuncommonmineral · Mohs 3.5colorless, white, gray- No imageProtozoa Agateuncommonfossil · Mohs 6.5-7brown, red, yellow
Pseudobrookiteuncommonmineral · Mohs 6dark brown, black
Pseudomalachiteuncommonmineral · Mohs 4-4.5dark green, emerald green, blackish green
Pseudorutileuncommonmineral · Mohs 5-6reddish-brown, brown, black
Pumpellyite-(Al)uncommonmineral · Mohs 5.5green, bluish-green, brownish-green- No imagePumpellyite-(Fe2+)uncommonmineral · Mohs 5.5-6green, brownish-green, blackish-green
- No imagePumpellyite-(Fe3+)uncommonmineral · Mohs 5.5-6green, brown, black
Pumpellyite-(Mg)uncommonmineral · Mohs 5.5green, blue-green, brown- No imagePurple Fluorapatiteuncommonmineral · Mohs 5purple, violet
Purpuriteuncommonmineral · Mohs 4-4.5deep purple, violet, brown
Pyrargyriteuncommonmineral · Mohs 2.5dark red, grayish red, black- No imagePyrite Concretionsuncommonmineral · Mohs 6-6.5brass-yellow
Pyritized Ammoniteuncommonfossil · Mohs 3-3.5brass yellow, metallic gold, bronze- No imagePyritized Gastropodsuncommonfossil · Mohs 3.5-4brass yellow, gold, brown
Pyroauriteuncommonmineral · Mohs 2.5yellow, brown, white
Pyrochroiteuncommonmineral · Mohs 2.5yellow, brown, white
Pyromorphiteuncommonmineral · Mohs 3.5-4green, yellow, brown- No imageRadioactive Mineralsuncommonmineral · Mohs 1-6yellow, green, black
Rammelsbergiteuncommonmineral · Mohs 5.5-6tin-white, reddish-white, steel-gray
Ramsdelliteuncommonmineral · Mohs 3black, gray
Ranciéiteuncommonmineral · Mohs 1.5-2.5black, brownish black
Realgaruncommonmineral · Mohs 1.5-2red, orange
Rectoriteuncommonmineral · Mohs 2-3white, gray, yellowish
Rhabdophane-(Ce)uncommonmineral · Mohs 3.5white, yellow, pink
Rhodochrositeuncommonmineral · Mohs 3.5-4pink, red, rose-red- No imageRhomboclaseuncommonmineral · Mohs 2colorless, white, gray
Richteriteuncommonmineral · Mohs 5-6brown, yellow, red
Rockbridgeiteuncommonmineral · Mohs 4.5dark green, brown, black
Römeriteuncommonmineral · Mohs 3yellow, brown, reddish-brown
Rosasiteuncommonmineral · Mohs 4blue, green, blue-green
Roscoeliteuncommonmineral · Mohs 2.5-3green, dark green, brownish green
Rose Muscoviteuncommonmineral · Mohs 2.5-3pink, rose-red
Royston Turquoiseuncommonmineral · Mohs 5-6blue, green, brown
Rubelliteuncommongemstone · Mohs 7-7.5pink, red, magenta
Saffloriteuncommonmineral · Mohs 4.5-5tin-white, silver-white, gray
Salammoniacuncommonmineral · Mohs 1.5-2white, yellow, gray
Saléeiteuncommonmineral · Mohs 2.5yellow, lemon-yellow, greenish-yellow
Sassoliteuncommonmineral · Mohs 1white, colorless, yellowish
Scepter Quartzuncommonmineral · Mohs 7colorless, white, smoky
Schröckingeriteuncommonmineral · Mohs 2.5yellow, greenish yellow
Scoroditeuncommonmineral · Mohs 3.5-4light green, pale blue, yellowish brown
Searlesiteuncommonmineral · Mohs 3.5white, colorless, gray
Semseyiteuncommonmineral · Mohs 2.5lead-gray
Senarmontiteuncommonmineral · Mohs 2.5white, colorless, gray
Serpieriteuncommonmineral · Mohs 2sky-blue, pale blue, bluish-green
Shattuckiteuncommonmineral · Mohs 3.5blue, greenish-blue
Sherry Topazuncommongemstone · Mohs 8yellow-brown, golden-brown, orange-brown
Siderophylliteuncommonmineral · Mohs 2.5-3black, brown, dark brown
Siderotiluncommonmineral · Mohs 2.5white, pale blue, pale green
Siegeniteuncommonmineral · Mohs 4.5-5.5steel gray, silver white, light gray- No imageSilicified Conodontsuncommonfossil · Mohs 7amber, brown, white
- No imageSilicified Cycad Wooduncommonfossil · Mohs 6.5-7brown, tan, white
- No imageSilicified Dinosaur Boneuncommonfossil · Mohs 6.5-7red, brown, black
- No imageSilicified Pine Conesuncommonfossil · Mohs 6.5-7brown, tan, gray
Silveruncommonmineral · Mohs 2.5-3silver-white, gray, black
Sklodowskiteuncommonmineral · Mohs 2-3yellow, pale yellow, greenish-yellow
Skutteruditeuncommonmineral · Mohs 5.5-6tin-white, silver-white, gray
Smaragditeuncommonmineral · Mohs 5-6emerald green, grass green
Spessartineuncommonmineral · Mohs 6.5-7.5orange, red-orange, red
Spessartine Garnetuncommongemstone · Mohs 6.5-7.5orange, red-orange, yellow-orange
Spheneuncommongemstone · Mohs 5-5.5yellow, green, brown
Spodumeneuncommonmineral · Mohs 6.5-7colorless, white, gray
Spurriteuncommonmineral · Mohs 5colorless, white, gray
Stanniteuncommonmineral · Mohs 3.5steel gray, iron black, blackish bronze- No imageStar Garnetuncommonmineral · Mohs 7-7.5reddish-brown, dark red, black
Starfish Fossiluncommonfossilgray, brown, tan
Stelleriteuncommonmineral · Mohs 4.5-5white, colorless, yellowish
Stephaniteuncommonmineral · Mohs 2-2.5iron-black, lead-gray
Stevensiteuncommonmineral · Mohs 1-2white, gray, yellowish
Strengiteuncommonmineral · Mohs 3.5-4red, violet, pink
Sudoiteuncommonmineral · Mohs 2.5-3white, gray, greenish
Sueviteuncommonigneous · Mohs 5-6gray, brown, greenish
Sunstoneuncommongemstone · Mohs 6-6.5orange, red, gold
Svanbergiteuncommonmineral · Mohs 4.5-5colorless, white, yellow
Synchysite-(Ce)uncommonmineral · Mohs 4.5yellow, brown, gray
Syngeniteuncommonmineral · Mohs 2.5colorless, white, pale yellow
Szaibelyiteuncommonmineral · Mohs 3-4white, gray, yellowish-white
Szaibélyiteuncommonmineral · Mohs 3.5white, gray, yellowish- No imageSzomolnokiteuncommonmineral · Mohs 2.5yellow, yellow-white, brownish-white
Tabbyiteuncommonmineral · Mohs 2-3black, brown
Tachyhydriteuncommonmineral · Mohs 2colorless, white, yellow
Tantaliteuncommonmineral · Mohs 6black, brownish-black, reddish-brown
Tantalite-(Fe)uncommonmineral · Mohs 6-6.5black, brownish-black
Tantalite-(Mn)uncommonmineral · Mohs 6black, brown, reddish-brown
Tektitesuncommonfossil · Mohs 5.5-6.5black, brown, olive green
Tellurobismuthiteuncommonmineral · Mohs 1.5-2white, tin-white, lead-gray
Tennantite-(Fe)uncommonmineral · Mohs 3-4steel-gray, iron-black
Tennantite-(Zn)uncommonmineral · Mohs 3-4steel-gray, iron-black
Tephroiteuncommonmineral · Mohs 6reddish-brown, gray, olive-green
Tetradymiteuncommonmineral · Mohs 1.5-2steel-gray, silver-white
Tetraferrianniteuncommonmineral · Mohs 2.5-3black, dark brown, dark green- No imageTetraferriphlogopiteuncommonmineral · Mohs 2.5-3brown, dark brown, yellowish-brown
Thaumasiteuncommonmineral · Mohs 3.5white, colorless
Thomsoniteuncommonmineral · Mohs 5-5.5white, pink, green- No imageThomsonite Nodulesuncommonmineral · Mohs 5-5.5white, pink, green
Thomsonite-Cauncommonmineral · Mohs 5-5.5white, pink, green- No imageThomsonite-Sruncommonmineral · Mohs 5-5.5white, colorless, yellow
Thuliteuncommonmineral · Mohs 6-6.5pink, reddish-pink, rose-red
Titaniteuncommonmineral · Mohs 5-5.5yellow, brown, green
Tobermoriteuncommonmineral · Mohs 2.5white, pink, yellowish
Torberniteuncommonmineral · Mohs 2-2.5emerald green, grass green, leek green
Tosuditeuncommonmineral · Mohs 1.5-2white, gray, yellow
Tridymiteuncommonmineral · Mohs 6.5colorless, white, gray
Triphyliteuncommonmineral · Mohs 4-4.5blue, blue-green, grayish-blue
Troiliteuncommonmineral · Mohs 3.5-4bronze, brownish-bronze, yellowish-brown
Tschermakiteuncommonmineral · Mohs 5-6black, dark green, dark brown
Tungstiteuncommonmineral · Mohs 2.5yellow, yellowish-green, orange-yellow
Hunt the unusual
Open RockHoundR to find mapped spots and log finds wherever they show up.
