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 1–120 of 521 uncommon entries.
Adamiteuncommonmineral · Mohs 3.5yellow, green, colorless
Aenigmatiteuncommonmineral · Mohs 5.5-6black, brownish-black- No imageAgatized Cycad Wooduncommonfossil · Mohs 6.5-7brown, tan, gray
Agatized Dinosaur Boneuncommonfossil · Mohs 6.5-7red, brown, tan- No imageAgatized Fern Budsuncommonfossil · Mohs 6.5-7brown, tan, gray
- No imageAgatized Limb Castsuncommonfossil · Mohs 6.5-7brown, red, yellow
Aikiniteuncommonmineral · Mohs 2-2.5lead-gray, blackish
Akaganeiteuncommonmineral · Mohs 3-4reddish-brown, brown, yellowish-brown
Åkermaniteuncommonmineral · Mohs 5-6colorless, white, gray
Alabanditeuncommonmineral · Mohs 3.5-4black, iron-black, brownish-black
Alibates Flintuncommonfossil · Mohs 6.5-7red, white, blue
Allaniteuncommonmineral · Mohs 5.5-6black, brown, reddish-brown
Allanite-(Ce)uncommonmineral · Mohs 5.5-6.5black, brown, reddish-brown
Alluauditeuncommonmineral · Mohs 3.5yellow, brown, green
Aluminiteuncommonmineral · Mohs 1-2white, grayish-white
Aluminoceladoniteuncommonmineral · Mohs 2blue, green, blue-green
Amblygoniteuncommonmineral · Mohs 5.5-6white, colorless, yellow
Ametrineuncommongemstone · Mohs 7yellow, purple, violet
Ammoniojarositeuncommonmineral · Mohs 2.5-3.5yellow, yellow-brown, brown
Anapaiteuncommonmineral · Mohs 3.5pale green, yellowish-green, white
Anataseuncommonmineral · Mohs 5.5-6black, brown, blue
Ancylite-(Ce)uncommonmineral · Mohs 4-4.5yellow, brown, reddish-brown
Annabergiteuncommonmineral · Mohs 1.5-2.5apple-green, pale green, white
Anorthiteuncommonmineral · Mohs 6white, colorless, gray
Antleriteuncommonmineral · Mohs 3.5emerald green, dark green, blackish green
Aphthitaliteuncommonmineral · Mohs 3-3.5white, colorless, gray
Apjohniteuncommonmineral · Mohs 1.5-2white, pale yellow, colorless
Aquamarineuncommongemstone · Mohs 7.5-8blue, blue-green, green-blue
Arfvedsoniteuncommonmineral · Mohs 5.5-6black, dark blue-black, dark green-black
Argentojarositeuncommonmineral · Mohs 2.5-3.5yellow, yellowish-brown
Arsenicuncommonmineral · Mohs 3.5tin-white, gray, black
Arseniosideriteuncommonmineral · Mohs 4-4.5yellow, brown, reddish-brown
Arsenoliteuncommonmineral · Mohs 1.5white, yellowish, reddish
Artiniteuncommonmineral · Mohs 2.5white, colorless
Asbolaneuncommonmineral · Mohs 5-6black, bluish black, dark gray
Astrophylliteuncommonmineral · Mohs 3bronze, golden-yellow, brown
Atacamiteuncommonmineral · Mohs 3-3.5dark green, bright green, emerald green
Austiniteuncommonmineral · Mohs 4colorless, white, yellow
Axiniteuncommonmineral · Mohs 6.5-7brown, violet-brown, plum-blue
Axinite-(Fe)uncommonmineral · Mohs 6.5-7clove-brown, plum-blue, honey-brown
Axinite-(Mn)uncommonmineral · Mohs 6.5-7clove-brown, brown, yellow-brown
Babingtoniteuncommonmineral · Mohs 5.5-6black, brownish-black
Baddeleyiteuncommonmineral · Mohs 6.5black, brown, yellow- No imageBalmorhea Blue Agateuncommonmineral · Mohs 6.5-7blue, gray, white
Bastnäsite-(Ce)uncommonmineral · Mohs 4-4.5yellow, reddish-brown, brown
Bayldoniteuncommonmineral · Mohs 4.5apple green, grass green, bright green
Berauniteuncommonmineral · Mohs 3.5-4reddish-brown, brown, dark red
Berthieriteuncommonmineral · Mohs 2-3dark gray, iron black
Bertranditeuncommonmineral · Mohs 6-7colorless, white, pale yellow
Beudantiteuncommonmineral · Mohs 3.5-4.5brown, yellow, green
Big Sur Jadeuncommonmineral · Mohs 6-6.5green, blue-green, olive
Bindheimiteuncommonmineral · Mohs 4-4.5yellow, orange, brown
Bischofiteuncommonmineral · Mohs 1.5-2colorless, white
Bismuthuncommonmineral · Mohs 2-2.5silver-white, pinkish-white, iridescent yellow
Bismutiteuncommonmineral · Mohs 3yellow, gray, white- No imageBlue Corundumuncommongemstone · Mohs 9blue, violet-blue, greenish-blue
Blue Dumortieriteuncommonmineral · Mohs 7-8.5blue, violet-blue, reddish-brown- No imageBlue Fluorapatiteuncommonmineral · Mohs 5blue, blue-green, teal
Blue Fluoriteuncommonmineral · Mohs 4blue, deep blue, sky blue
Blue Silicified Coraluncommonfossil · Mohs 6.5-7blue, gray, white- No imageBlue Vivianiteuncommonmineral · Mohs 1.5-2blue, green
Boraciteuncommonmineral · Mohs 7-7.5colorless, white, gray
Botryogenuncommonmineral · Mohs 2-2.5orange, red, yellow
Boulangeriteuncommonmineral · Mohs 2.5-3lead-gray, bluish-gray
Boulder Opaluncommongemstone · Mohs 5.5-6.5black, white, gray
Bournoniteuncommonmineral · Mohs 2.5-3steel-gray, iron-black
Boussingaultiteuncommonmineral · Mohs 2white, colorless, yellowish
Boweniteuncommonmineral · Mohs 2.5-5.5apple green, light green, yellowish green
Brauniteuncommonmineral · Mohs 6-6.5black, brownish-black
Brazilianiteuncommonmineral · Mohs 5.5yellow, yellow-green, colorless
Brewsterite-Sruncommonmineral · Mohs 5white, yellow, colorless
Brookiteuncommonmineral · Mohs 5.5-6reddish-brown, brown, black
Bruneau Canyon Jasperuncommonmineral · Mohs 6.5-7brown, cream, tan
Bruneau Jasperuncommonfossil · Mohs 6.5-7red, brown, cream
Brushiteuncommonmineral · Mohs 2.5white, colorless, yellowish
Bumblebee Jasperuncommonfossil · Mohs 6-7yellow, orange, black
Bustamiteuncommonmineral · Mohs 5.5-6.5pink, reddish-pink, brownish-pink
Bytowniteuncommonmineral · Mohs 6-6.5white, gray, yellowish
Cacoxeniteuncommonmineral · Mohs 3-4yellow, golden-yellow, orange
Cactus Quartzuncommonmineral · Mohs 7purple, white, yellow- No imageCalifornia Jadeuncommonmineral · Mohs 6.5green, yellow-green, white
- No imageCaliforniteuncommonmineral · Mohs 6.5green, yellow-green, white
Cancriniteuncommonmineral · Mohs 5-6yellow, orange, white
Carpholiteuncommonmineral · Mohs 5-5.5straw-yellow, pale yellow, brownish yellow
Cat's Eye Quartzuncommongemstone · Mohs 7gray, yellow, green
Catapleiiteuncommonmineral · Mohs 5.5-6colorless, white, yellow
Cerargyriteuncommonmineral · Mohs 1.5colorless, white, gray
Cervantiteuncommonmineral · Mohs 4-5yellow, white, gray- No imageChabazite-Kuncommonmineral · Mohs 4-5white, colorless, yellow
Chalcanthiteuncommonmineral · Mohs 2.5blue, blue-green
Chalcoalumiteuncommonmineral · Mohs 2.5sky-blue, blue-green- No imageChalcoliteuncommonmineral · Mohs 2-2.5emerald green, grass green, leaf green
Chalcophaniteuncommonmineral · Mohs 2.5black, bluish-black
Childreniteuncommonmineral · Mohs 5yellow, brown, reddish-brown
Chlorargyriteuncommonmineral · Mohs 1.5-2.5white, gray, yellow
Chondroditeuncommonmineral · Mohs 6-6.5yellow, orange, brown
Chrome Diopsideuncommongemstone · Mohs 5.5-6.5vivid green, emerald green
Chrysoberyluncommonmineral · Mohs 8.5yellow, yellow-green, brown
Chrysopraseuncommongemstone · Mohs 6.5-7apple green, emerald green
Cinnabaruncommonmineral · Mohs 2-2.5red, brownish-red, scarlet
Clinoatacamiteuncommonmineral · Mohs 3dark green, bright green, emerald green
Clintoniteuncommonmineral · Mohs 3.5-6yellowish-white, reddish-brown, greenish
Cobaltiteuncommonmineral · Mohs 5.5silver-white, reddish-white, gray
Cobaltoan Calciteuncommonmineral · Mohs 3pink, magenta, rose-red
Coffiniteuncommonmineral · Mohs 5black, dark gray, brownish-black
Colemaniteuncommonmineral · Mohs 4.5colorless, white, gray
Columbiteuncommonmineral · Mohs 6black, brownish-black, iron-black
Columbite-(Fe)uncommonmineral · Mohs 6black, brownish-black
Columbite-(Mn)uncommonmineral · Mohs 6black, brownish-black, reddish-brown
Columbite-Tantaliteuncommonmineral · Mohs 6black, brownish-black, brown
Columbium Oreuncommonmineral · Mohs 6black, brownish-black, iron-black
Cookeiteuncommonmineral · Mohs 2.5-3white, yellow, pink
Coquimbiteuncommonmineral · Mohs 2.5violet, pale violet, white
Corkiteuncommonmineral · Mohs 3.5-4yellow, brown, greenish-brown
Coronaditeuncommonmineral · Mohs 4.5-5black, gray
Corrensiteuncommonmineral · Mohs 2-3green, yellow, white
Cosaliteuncommonmineral · Mohs 2.5-3lead-gray, steel-gray, white
Coyamito Agateuncommonmineral · Mohs 6.5-7red, white, pink
Crandalliteuncommonmineral · Mohs 5white, colorless, yellow
Creediteuncommonmineral · Mohs 3.5-4colorless, white, orange
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