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 2281–2400 of 4900 rare entries (page 20 of 41).
- No imageKolfaniteraremineral · Mohs 6.5-7.5yellow, brown, reddish-brown
Koliciteraremineral · Mohs 5-6orange, reddish-orange
Kolitschiteraremineral · Mohs 2-3yellow, yellowish-orange
Kolleriteraremineral · Mohs 2-3yellow, pale yellow
Kolovratiteraremineral · Mohs 2-3yellow, yellowish-green- No imageKolskyiteraremineral · Mohs 3-4brown, yellowish-brown
Kolweziteraremineral · Mohs 3.5-4green, brownish-green, pinkish
Kolymiteraremineral · Mohs 3.5silvery white, gray
Komaroviteraremineral · Mohs 4-5yellow, brown, white
Komatiiterareigneous · Mohs 5-6dark gray, greenish-gray, black
Kombatiteraremineral · Mohs 2yellow, yellowish-orange
Komkoviteraremineral · Mohs 4-5colorless, yellow, brownish-yellow- No imageKonderiteraremineral · Mohs 4.5-5white, gray
Koninckiteraremineral · Mohs 3.5yellow, yellowish-white, colorless- No imageKononoviteraremineral · Mohs 3.5yellow, brownish-yellow
Konyaiteraremineral · Mohs 2white, colorless- No imageKoragoiteraremineral · Mohs 4-5yellow, brownish-yellow
Koritnigiteraremineral · Mohs 2-3pink, pale red, colorless- No imageKorneliteraremineral · Mohs 2.5violet, lavender, pinkish-white
Kornerupineraremineral · Mohs 6.5-7green, yellowish-green, brown
Korobitsyniteraremineral · Mohs 5yellow, brownish-yellow, pale yellow
Korshunovskiteraremineral · Mohs 2white, colorless- No imageKoryakiteraremineral · Mohs 3-4white, colorless
Korzhinskiteraremineral · Mohs 3.5white, colorless
Kosmochlorraremineral · Mohs 6-6.5emerald-green, dark green
Kosnariteraremineral · Mohs 3.5colorless, white, yellow
Kostoviteraremineral · Mohs 2white, silver-white, pale brass-yellow
Kostyleviteraremineral · Mohs 5colorless, white
Kotoiteraremineral · Mohs 6.5white, gray, yellow
Kottenheimiteraremineral · Mohs 2white, colorless
Köttigiteraremineral · Mohs 1.5-2pink, reddish-pink, violet
Kotulskiteraremineral · Mohs 2.5white, gray, pinkish-white
Koutekiteraremineral · Mohs 3.5white, silver-white, pinkish-white
Kovdorskiteraremineral · Mohs 3.5pale blue, colorless, white- No imageKozoite-(La)raremineral · Mohs 4-4.5white, colorless, pale pink
- No imageKozoite-(Nd)raremineral · Mohs 4-4.5white, colorless, pale pink
- No imageKozyrevskiteraremineral · Mohs 2yellow, greenish-yellow
Kraissliteraremineral · Mohs 3-4yellow, brown, orange-brown- No imageKrasheninnikoviteraremineral · Mohs 2.5colorless, white
Krásnoiteraremineral · Mohs 4white, colorless
Krasnoshteiniteraremineral · Mohs 2white, colorless
Krasnoviteraremineral · Mohs 3-4white, colorless- No imageKratochvíliteraremineral · Mohs 1yellow, colorless, white
- No imageKrausiteraremineral · Mohs 2.5yellow, brownish-yellow
- No imageKrauskopfiteraremineral · Mohs 3.5colorless, white
Krautiteraremineral · Mohs 2pink, colorless, white
Kremersiteraremineral · Mohs 2red, reddish-orange
Krenneriteraremineral · Mohs 2.5silver-white, pale brass-yellow- No imageKrettnichiteraremineral · Mohs 3.5yellow, brownish-yellow
Kribergiteraremineral · Mohs 3.5white, colorless
Krieseliteraremineral · Mohs 3.5yellow, yellowish-white
Krinoviteraremineral · Mohs 6-7dark green, emerald green
Kristianseniteraremineral · Mohs 3.5colorless, white- No imageKrivovicheviteraremineral · Mohs 2colorless, white, pale yellow
- No imageKrotiteraremineral · Mohs 3.5colorless
- No imageKroupaiteraremineral · Mohs 3yellow, orange-yellow
Kruijeniteraremineral · Mohs 2colorless, white
Krupkaiteraremineral · Mohs 3.5lead-gray, steel-gray
Kruťaiteraremineral · Mohs 3.5gray, silver-white
Krutoviteraremineral · Mohs 5.5white, pale gray
Kryzhanovskiteraremineral · Mohs 3.5brownish-red, orange-brown, reddish-brown
Ktenasiteraremineral · Mohs 2bright blue, blue-green- No imageKuannersuite-(Ce)raremineral · Mohs 3.5-4yellow, brown, red-brown
Kudriaviteraremineral · Mohs 2yellow, pale yellow- No imageKudryavtsevaiteraremineral · Mohs 3.5yellow, brownish-yellow
Kukharenkoite-(Ce)raremineral · Mohs 4.5yellow, yellowish-brown, brown- No imageKukharenkoite-(La)raremineral · Mohs 4.5yellowish-brown, brown, yellow
Kukisvumiteraremineral · Mohs 3-4white, colorless, pale yellow
Kuksiteraremineral · Mohs 3-4yellow, yellowish-green, colorless
Kulaniteraremineral · Mohs 4blue, blue-green, colorless- No imageKuliginiteraremineral · Mohs 3.5yellow, brownish-yellow
Kuliokite-(Y)raremineral · Mohs 5yellow, brown, colorless
Kulkeiteraremineral · Mohs 2white, colorless, pale green- No imageKulleruditeraremineral · Mohs 5-6silver-white, tinfoil-white
Kumdykoliteraremineral · Mohs 6white, colorless
Kummeriteraregemstone · Mohs 9pink, violet, lavender
Kumtyubeiteraremineral · Mohs 3.5white, colorless- No imageKunatiteraremineral · Mohs 4yellow, brownish-yellow
- No imageKupčíkiteraremineral · Mohs 3-3.5black
Kupletskiteraremineral · Mohs 3-4dark brown, reddish-brown, black
Kupletskite-(Cs)raremineral · Mohs 3dark brown, reddish-brown, bronze- No imageKuramiteraremineral · Mohs 3.5-4gray, blackish-gray
Kuranakhiteraremineral · Mohs 3.5black, brownish-black- No imageKuratiteraremineral · Mohs 6-7black, dark brown
Kurchatoviteraremineral · Mohs 4.5white, colorless, gray- No imageKurgantaiteraremineral · Mohs 3.5white, colorless, gray
- No imageKuriliteraremineral · Mohs 2.5-3silver-white, pale brass-yellow
Kurnakoviteraremineral · Mohs 3white, colorless
Kurumsakiteraremineral · Mohs 2yellow, greenish-yellow
Kusachiiteraremineral · Mohs 3-4black, dark brown- No imageKushiroiteraremineral · Mohs 6-7green, dark green, black
Kutinaiteraremineral · Mohs 3.5silver-white, pale brass-yellow
Kuzeliteraremineral · Mohs 2white, colorless, pale yellow
Kuzmenkoite-Mnraremineral · Mohs 5yellow, brown, orange- No imageKuzmenkoite-Znraremineral · Mohs 5yellow, brown, orange
- No imageKuzminiteraremineral · Mohs 2.5white, gray
Kuznetsoviteraremineral · Mohs 3.5dark red, red-brown, orange-red
Kvanefjelditeraremineral · Mohs 3-4pink, brown, white- No imageKyanoxaliteraremineral · Mohs 5-6white, colorless
Kyawthuiteraremineral · Mohs 5.5orange, reddish-orange- No imageKyrgyzstaniteraremineral · Mohs 2yellow, pale yellow
- No imageKyzylkumiteraremineral · Mohs 5-6dark brown, black
Labuntsovite-Feraremineral · Mohs 5-6orange, brown, yellow
Labuntsovite-Mgraremineral · Mohs 5yellow, brown, orange
Labuntsovite-Mnraremineral · Mohs 5red, brown, orange- No imageLabyrinthiteraremineral · Mohs 5-6pink, reddish-brown
Lacroixiteraremineral · Mohs 4.5-5yellow, yellow-green, colorless
Laffittiteraremineral · Mohs 3dark red, brownish-red- No imageLaflammeiteraremineral · Mohs 1.5-2white, gray
- No imageLaforêtiteraremineral · Mohs 3.5gray, white
Lafossaiteraremineral · Mohs 2.5white, colorless, yellow- No imageLahnsteiniteraremineral · Mohs 2white, colorless
Laihuniteraremineral · Mohs 5-6reddish-brown, brown, black
Laitakariteraremineral · Mohs 2lead-gray, tin-white
Lakargiiteraremineral · Mohs 5-6yellow, brown, colorless- No imageLakebogaiteraremineral · Mohs 3-4yellow, yellow-orange, brown
- No imageLalondeiteraremineral · Mohs 5white, colorless
Lammeriteraremineral · Mohs 3.5green, yellowish-green
Lamproiterareigneousgray, greenish-gray, brown
Lamprophylliteraremineral · Mohs 2-3brown, golden-brown, yellow-brown
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