Rare rocks & minerals
Rare rocks and minerals occur in only a handful of localities worldwide, or in such small quantities that good specimens command serious money. These are the trophy pieces of cabinet collectors.
Showing 2161–2280 of 4900 rare entries (page 19 of 41).
Karliteraremineral · Mohs 6colorless, white, gray
Karnasurtite-(Ce)raremineral · Mohs 3yellowish-brown, brown, light brown- No imageKarpenkoiteraremineral · Mohs 2-3dark green, blackish green
- No imageKarpinskiteraremineral · Mohs 3.5-4white, colorless, pale yellow
- No imageKarpoviteraremineral · Mohs 2yellow, pale yellow
- No imageKarupmøllerite-Cararemineral · Mohs 5yellow, yellow-brown, brown
- No imageKasatkiniteraremineral · Mohs 3.5-4colorless, white, yellowish
Kashiniteraremineral · Mohs 3.5-4white, pale gray- No imageKaskasiteraremineral · Mohs 2yellow, pale yellow
Kasoliteraremineral · Mohs 4-5yellow, yellow-orange, brownish-yellow
Kassiteraremineral · Mohs 4colorless, white, yellowish
Kastningiteraremineral · Mohs 3.5pink, violet, reddish-pink
Katayamaliteraremineral · Mohs 5pink, white, colorless
Katerinopoulositeraremineral · Mohs 2-3white, colorless- No imageKatiarsiteraremineral · Mohs 2.5white, colorless
Katoiteraremineral · Mohs 6white, colorless, pale yellow
Katophoriteraremineral · Mohs 5-6dark brown, brownish red, black
Katoptriteraremineral · Mohs 5-6black
Kawazuliteraremineral · Mohs 1.5-2tin-white, lead-gray- No imageKayrobertsoniteraremineral · Mohs 3.5yellow, pale yellow
Kazakhstaniteraremineral · Mohs 1-2black, dark brown
Kazakoviteraremineral · Mohs 4pink, red, brown- No imageKazanskyiteraremineral · Mohs 3yellow, brown
Keckiteraremineral · Mohs 3-4yellowish-brown, brown
Kegeliteraremineral · Mohs 2.5white, gray, colorless- No imageKegginiteraremineral · Mohs 2yellow, yellow-orange
- No imageKeiliteraremineral · Mohs 3.5-4black, brown
- No imageKeithconniteraremineral · Mohs 3.5-4bronze, white
Keiviite-(Y)raremineral · Mohs 5colorless, white, yellowish
Keiviite-(Yb)raremineral · Mohs 5-6colorless, white, yellowish-white- No imageKeldyshiteraremineral · Mohs 5-6white, colorless, gray
Kellyiteraremineral · Mohs 2.5yellow, yellow-green
Kelyaniteraremineral · Mohs 3.5yellow, yellow-orange
Kemmlitziteraremineral · Mohs 4.5yellow, brown, yellowish-brown
Kempiteraremineral · Mohs 3.5emerald-green, olive-green
Kenhsuiteraremineral · Mohs 2red, reddish-orange- No imageKenngottiteraremineral · Mohs 2-3iron-black, dark gray
Kenoargentotetrahedrite-(Fe)raremineral · Mohs 3-4iron-black, steel-gray- No imageKenoplumbomicroliteraremineral · Mohs 5-5.5yellow, brown, orange
- No imageKenotobermoriteraremineral · Mohs 2.5-3white, colorless
Kentbrooksiteraremineral · Mohs 5-6brown, yellow-brown, pinkish-brown
Kentroliteraremineral · Mohs 5dark brown, black, reddish-brown
Kenyaiteraremineral · Mohs 2-3white, colorless- No imageKerimasiteraremineral · Mohs 6.5-7black
Kermesiteraremineral · Mohs 1-1.5cherry-red, dark red
Kësteriteraremineral · Mohs 3.5brown, brownish-black, black
Kettneriteraremineral · Mohs 3yellow, yellowish-white, colorless
Keutschiteraremineral · Mohs 3-4gray, black
Keyiteraremineral · Mohs 3-4green, yellow-green- No imageKeystoneiteraremineral · Mohs 2-3blue, greenish blue
Khademiteraremineral · Mohs 2.5-3yellow, yellowish-white, colorless
Khaidarkaniteraremineral · Mohs 2blue, greenish-blue
Khamrabaeviteraremineral · Mohs 8-9gray, silver-gray
Khanneshiteraremineral · Mohs 3-4white, colorless, pale yellow- No imageKharaelakhiteraremineral · Mohs 3.5-4gray, brownish-gray
Khatyrkiteraremineral · Mohs 4silver-white, pale brass-yellow
Khesiniteraremineral · Mohs 5-6black, brown- No imageKhibinskiteraremineral · Mohs 5colorless, white, pale yellow
Khiniteraremineral · Mohs 3yellow, greenish-yellow- No imageKhmaraliteraremineral · Mohs 7-7.5dark blue, greenish-blue, dark green
Khomyakoviteraremineral · Mohs 5-6red, orange-red- No imageKhrenoviteraremineral · Mohs 4-5yellow, yellowish-brown
Khristovite-(Ce)raremineral · Mohs 6-7brown, yellowish-brown
Khurayyimiteraremineral · Mohs 4colorless, white- No imageKhvoroviteraremineral · Mohs 7yellow, brown, reddish-brown
Kiddcreekiteraremineral · Mohs 3.5pinkish-bronze, copper-red
Kidwelliteraremineral · Mohs 3.5yellow, yellow-green, brownish-yellow- No imageKieftiteraremineral · Mohs 3.5silver-white, gray
- No imageKihlmanite-(Ce)raremineral · Mohs 3.5-4yellowish-brown, brown, yellow
Kilchoaniteraremineral · Mohs 5white, colorless
Killalaiteraremineral · Mohs 5.5colorless, white
Kimrobinsoniteraremineral · Mohs 2.5colorless, white- No imageKimseyiteraremineral · Mohs 7dark brown, black
Kimuraite-(Y)raremineral · Mohs 3.5pink, white, colorless
Kimzeyiteraremineral · Mohs 7dark brown, black, reddish brown
Kingiteraremineral · Mohs 2white- No imageKingsmountiteraremineral · Mohs 3-4white, colorless, pale yellow
- No imageKingstoniteraremineral · Mohs 3.5white, cream
- No imageKinichiliteraremineral · Mohs 3yellow, yellowish-orange
Kinoiteraremineral · Mohs 5blue, azure-blue
Kinoshitaliteraremineral · Mohs 2.5-3yellow, brown, orange
Kintoreiteraremineral · Mohs 3.5-4yellow, brownish yellow, olive green
Kipushiteraremineral · Mohs 4green, blue-green, bluish-green
Kircheriteraremineral · Mohs 5-6colorless, white, yellow- No imageKirchhoffiteraremineral · Mohs 4.5-5white, colorless
Kirkiiteraremineral · Mohs 3lead-gray, black
Kirschsteiniteraremineral · Mohs 6yellowish-green, brownish, colorless- No imageKitagohaiteraremineral · Mohs 3.5-4white, silver-white
Kitkaiteraremineral · Mohs 3.5white, gray- No imageKittatinnyiteraremineral · Mohs 3yellow, yellow-brown
Kladnoiteraremineral · Mohs 1.5white, yellowish, brownish- No imageKlajiteraremineral · Mohs 2-3yellow, yellow-green
- No imageKlaprothiteraremineral · Mohs 2.5steel-gray, blackish-gray
Klebelsbergiteraremineral · Mohs 2-2.5yellow, yellowish-green, colorless
Kleberiteraremineral · Mohs 5-6black, brown
Kleemaniteraremineral · Mohs 3.5white, colorless, pale yellow
Kleiniteraremineral · Mohs 3.5yellow, pale yellow, orange-yellow- No imageKlöchiteraremineral · Mohs 7dark brown, black
Klockmanniteraremineral · Mohs 2-3slate-gray, bluish-gray
Klyuchevskiteraremineral · Mohs 2-2.5green, yellow-green- No imageKnasibfiteraremineral · Mohs 3colorless, white
- No imageKnorringiteraremineral · Mohs 7-7.5dark green, emerald green
- No imageKoashviteraremineral · Mohs 5-6red, brownish-red, yellow-brown
Kobeite-(Y)raremineral · Mohs 5-6black, brownish black
Kobelliteraremineral · Mohs 2.5-3lead-gray, black
Kobokoboiteraremineral · Mohs 3white, colorless
Kobyasheviteraremineral · Mohs 2-3blue, pale blue- No imageKochiteraremineral · Mohs 3.5-4colorless, white
- No imageKochkariteraremineral · Mohs 2steel-gray, silver-white
Kochsándoriteraremineral · Mohs 2white, colorless
Koechliniteraremineral · Mohs 3yellow, greenish-yellow, pale yellow
Koeneniteraremineral · Mohs 1.5-2white, yellow, red
Kogarkoiteraremineral · Mohs 3.5colorless, white, pale yellow- No imageKojoneniteraremineral · Mohs 3.5-4pinkish-white
- No imageKokchetaviteraremineral · Mohs 2.5-3colorless, white, pale yellow
- No imageKokinositeraremineral · Mohs 2-3orange, yellow
- No imageKoksharoviteraremineral · Mohs 4.5yellow, yellowish-brown
Koktaiteraremineral · Mohs 2colorless, white- No imageKolariteraremineral · Mohs 2yellow, brownish-yellow
Kolbeckiteraremineral · Mohs 3.5-4apple-green, blue-green, yellowish-green
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