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 2881–3000 of 4900 rare entries (page 25 of 41).
- No imageMiddlebackiteraremineral · Mohs 2-3blue
Mieite-(Y)raremineral · Mohs 5-6yellow, yellow-brown, brown
Miersiteraremineral · Mohs 2-2.5yellow, bright yellow, pale yellow- No imageMiessiiteraremineral · Mohs 2white, pale yellow
Miguelromeroiteraremineral · Mohs 3-4yellow, yellowish-orange- No imageMiharaiteraremineral · Mohs 4-5black, brownish-black
- No imageMikasaiteraremineral · Mohs 2white, yellowish-white, colorless
Milanriederiteraremineral · Mohs 6.5yellow, brown
Milariteraremineral · Mohs 5.5-6colorless, white, yellowish
Millisiteraremineral · Mohs 5white, colorless, light blue
Millosevichiteraremineral · Mohs 2-3white, pale yellow, pale green- No imageMillsiteraremineral · Mohs 2yellow, pale yellow
- No imageMilotaiteraremineral · Mohs 3-3.5gray, white
Minasragriteraremineral · Mohs 1-2blue- No imageMineevite-(Y)raremineral · Mohs 3-4colorless, white, yellow
Minehilliteraremineral · Mohs 3white, colorless, pale yellow
Minguzziteraremineral · Mohs 2-3green
Miniumraremineral · Mohs 2.5red, orange, bright red- No imageMinjiangiteraremineral · Mohs 3.5colorless, white
Minohliteraremineral · Mohs 2.5blue, blue-green
Minrecorditeraremineral · Mohs 3.5-4colorless, white, pale yellow
Minyuliteraremineral · Mohs 3.5white, colorless, pale yellow- No imageMisakiiteraremineral · Mohs 2.5bright green, bluish-green
Miseniteraremineral · Mohs 2white, colorless
Miseriteraremineral · Mohs 5-6pink, rose-red, brownish-pink- No imageMitrofanoviteraremineral · Mohs 3.5white
- No imageMitryaevaiteraremineral · Mohs 3-4white, colorless
Mitscherlichiteraremineral · Mohs 2blue, blue-green
Mixiteraremineral · Mohs 3-4white, green, blue-green- No imageMiyahisaiteraremineral · Mohs 5yellow, yellow-brown
Moctezumiteraremineral · Mohs 3orange, orange-red
Modderiteraremineral · Mohs 3.5white, gray- No imageMoëloiteraremineral · Mohs 2-3lead-gray, tin-white
- No imageMogoviditeraremineral · Mohs 7black, brown
Mohiteraremineral · Mohs 3-3.5steel-gray, silver-white
Möhniteraremineral · Mohs 3-3.5steel-gray, silver-white
Mohriteraremineral · Mohs 2-3greenish-white, pale green, colorless
Moissaniteraremineral · Mohs 9.25colorless, green, blue
Moldaviteraremineral · Mohs 5.5bottle green, olive green, brownish green
Molinelloiteraremineral · Mohs 3blue, deep blue- No imageMoluraniteraremineral · Mohs 2yellow, yellow-brown
Molybdofornaciteraremineral · Mohs 3yellow, greenish-yellow
Molybdomeniteraremineral · Mohs 2.5white, yellowish-white, colorless
Molybdophylliteraremineral · Mohs 3.5-4colorless, white, yellow
Molysiteraremineral · Mohs 1.5yellow, reddish-yellow, red
Momoiiteraremineral · Mohs 7-7.5yellow-green, emerald-green, yellowish-brown- No imageMonazite-(Nd)raremineral · Mohs 5-5.5reddish-brown, brown, yellowish-brown
- No imageMonazite-(Sm)raremineral · Mohs 5-5.5yellow, brown, reddish-brown
Moncheiteraremineral · Mohs 2.5-3white, tin-white
Monetiteraremineral · Mohs 3.5white, colorless, gray
Mongoliteraremineral · Mohs 2white, pale yellow
Monimoliteraremineral · Mohs 5-6yellow, yellowish-brown, greenish-yellow- No imageMonipiteraremineral · Mohs nullgray
Monohydrocalciteraremineral · Mohs 3white, colorless, gray
Montaniteraremineral · Mohs 3yellow, white, pale yellow
Montbrayiteraremineral · Mohs 2.5-3white, pale yellow- No imageMontdoriteraremineral · Mohs 2.5yellow, brown
Monteneveiteraremineral · Mohs 7dark red, brownish-red
Monteponiteraremineral · Mohs 3yellow, yellowish-brown, black
Monteregianite-(Y)raremineral · Mohs 3.5colorless, white, pale yellow
Montesommaiteraremineral · Mohs 4.5colorless, white- No imageMontetrisaiteraremineral · Mohs 2-3blue, greenish blue
Montgomeryiteraremineral · Mohs 3colorless, white, green
Montroseiteraremineral · Mohs 5.5black- No imageMontroyaliteraremineral · Mohs 3.5white, colorless
Montroyditeraremineral · Mohs 1.5-2orange, red, brown- No imageMooihoekiteraremineral · Mohs 3.5bronze-yellow, brass-yellow
Moolooiteraremineral · Mohs 2blue, green- No imageMooreiteraremineral · Mohs 3colorless, white, pinkish
- No imageMoorhouseiteraremineral · Mohs 2pink, reddish-pink, white
Mopungiteraremineral · Mohs 3white, colorless
Moraesiteraremineral · Mohs 3white, colorless, pale yellow- No imageMoraskoiteraremineral · Mohs 3-4colorless, white
Moreauiteraremineral · Mohs 3yellow, yellow-green
Morelanditeraremineral · Mohs 5yellow, brown, colorless
Morenositeraremineral · Mohs 2-2.5apple-green, light green, white- No imageMorimotoiteraremineral · Mohs 6.5-7black, brownish black
Moriniteraremineral · Mohs 4.5pink, flesh-red, white- No imageMorozevicziteraremineral · Mohs 4black, iron-black
Mosandrite-(Ce)raremineral · Mohs 4yellow, brown, reddish-brown- No imageMoscheliteraremineral · Mohs 1.5-2yellow, pale yellow, colorless
Moschellandsbergiteraremineral · Mohs 3.5silver-white, pale yellow- No imageMosesiteraremineral · Mohs 3yellow, light yellow, lemon-yellow
- No imageMoskvinite-(Y)raremineral · Mohs 5-6colorless, white, pale yellow
- No imageMössbaueriteraremineral · Mohs 2yellow, brownish-yellow, reddish-brown
Mottanaite-(Ce)raremineral · Mohs 5.5brown, reddish-brown
Motukoreaiteraremineral · Mohs 2white, pale blue, greenish
Mounanaiteraremineral · Mohs 3.5dark red, reddish brown, orange red
Mountainiteraremineral · Mohs 3white, colorless
Mountkeithiteraremineral · Mohs 2white, pale yellow- No imageMouriteraremineral · Mohs 3-4dark blue, deep violet
Moydite-(Y)raremineral · Mohs 3.5white, yellow, tan
Mozartiteraremineral · Mohs 6-6.5red, brown, orange- No imageMozgovaiteraremineral · Mohs 2.5lead-gray, steel-gray
- No imageMpororoiteraremineral · Mohs 2-3yellow, greenish-yellow
Mrázekiteraremineral · Mohs 2deep blue
Mroseiteraremineral · Mohs 3.5colorless, white, yellowish
Mückeiteraremineral · Mohs 3-4yellow, brownish-yellow- No imageMuiriteraremineral · Mohs 3.5yellow, brown, orange-brown
- No imageMukhiniteraremineral · Mohs 6-7dark green, brownish green
Mummeiteraremineral · Mohs 3.5lead-gray, grayish-white
Munakataiteraremineral · Mohs 3-4bright blue, pale blue
Munditeraremineral · Mohs 3yellow, brownish-yellow- No imageMundrabillaiteraremineral · Mohs 2white, colorless
- No imageMuniriteraremineral · Mohs 2white, yellow, pale yellow
- No imageMurakamiiteraremineral · Mohs 5pink, white, colorless
- No imageMurashkoiteraremineral · Mohs 5-6silver-white, gray
- No imageMurataite-(Y)raremineral · Mohs 6yellow, brown, black
- No imageMurchisiteraremineral · Mohs 2.5-3white, colorless, gray
Murdochiteraremineral · Mohs 3.5-4black
Murmaniteraremineral · Mohs 2-3violet, brown, pink- No imageMurunskiteraremineral · Mohs 3-4bronze-yellow, steel-gray
Mushistoniteraremineral · Mohs 3.5-4yellowish-green, olive-green, brownish-green
Muskoxiteraremineral · Mohs 2-3brown, yellowish-brown
Muthmanniteraremineral · Mohs 2.5pale yellow, tin-white, grayish-white- No imageMutinaiteraremineral · Mohs 4-5white, colorless
- No imageMutnovskiteraremineral · Mohs 1.5-2gray, white
- No imageNabalamprophylliteraremineral · Mohs 3yellow, brown, reddish-brown
Nabaphiteraremineral · Mohs 3.5colorless, white, pale yellow- No imageNabesiteraremineral · Mohs 4-5colorless, white
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