Minerals

Cabalzarite

Hardness: 5

Cabriite

Hardness: 4

Cabvinite

Cacoxenite

Hardness: 3 - 4

Cadmium

Hardness: 1 - 2

Cadmoindite

Cadmoselite

Hardness: 4

Cadwaladerite

Caesiumpharmacosiderite

Cafarsite

Hardness: 5.5 - 6

Cafetite

Hardness: 4 - 5

Cahnite

Hardness: 3

Cairncrossite

Hardness: 3

Calamaite

Hardness: 3

Calaverite

Hardness: 2.5 - 3

Calciborite

Calcinaksite

Hardness: 5

Calcio-olivine

Calcioancylite-(ce)

Hardness: 4 - 4.5

Calcioancylite-(nd)

Hardness: 4 - 4.5

Calcioandyrobertsite

Hardness: 3

Calcioaravaipaite

Hardness: 2.5

Calcioburbankite

Hardness: 3 - 4

Calciocatapleiite

Hardness: 4.5 - 5

Calciocopiapite

Hardness: 2.5 - 3

Calciodelrioite

Hardness: 2.5

Calcioferrite

Hardness: 2.5

Calciohilairite

Hardness: 4

Calciojohillerite

Calciolangbeinite

Hardness: 3 - 3.5

Calciomurmanite

Calciopetersite

Calciosamarskite

Hardness: 6.5

Calciotantite

Hardness: 6.5

Calciouranoite

Hardness: 4

Calcioursilite

Calcjarlite

Calclacite

Calcurmolite

Calderite

Calderónite

Hardness: 3 - 4

Caledonite

Hardness: 2.5 - 3

Calkinsite-(ce)

Hardness: 2.5

Callaghanite

Hardness: 3 - 3.5

Calomel

Hardness: 1.5 - 2

Calumetite

Hardness: 2

Calvertite

Hardness: 4 - 5

Calzirtite

Hardness: 6 - 7

Camanchacaite

Hardness: 2.5

Cámaraite

Camaronesite

Hardness: 2.5

Camérolaite

Cameronite

Hardness: 3.5 - 4

Camgasite

Hardness: 2

Caminite

Hardness: 2.5

Campigliaite

Campostriniite

Canaphite

Hardness: 2

Canasite

Canavesite

Cancrinite

Hardness: 5 - 6

Cancrisilite

Hardness: 5

Canfieldite

Hardness: 2.5

Cannizzarite

Hardness: 2

Cannonite

Hardness: 4

Canosioite

Hardness: 6 - 6.5

Canutite

Hardness: 2.5

Caoxite

Hardness: 2 - 2.5

Capgaronnite

Cappelenite-(y)

Hardness: 6 - 6.5

Capranicaite

Caracolite

Hardness: 4.5

Carboborite

Hardness: 2

Carbobystrite

Hardness: 6

Carbocernaite

Hardness: 3

Carboirite

Hardness: 6

Carbokentbrooksite

Hardness: 5

Carbonatecyanotrichite

Hardness: 2

Cardite

Carducciite

Hardness: 2.5 - 3

Caresite

Hardness: 2

Carletonite

Hardness: 4 - 4.5

Carletonmooreite

Carlfrancisite

Carlfriesite

Hardness: 3.5

Carlgieseckeite-(nd)

Hardness: 5

Carlhintzeite

Carlinite

Hardness: 1.5 - 2

Carlosbarbosaite

Carlosruizite

Hardness: 2.5 - 3

Carlosturanite

Hardness: 2.5

Carlsbergite

Hardness: 7

Carlsonite

Hardness: 2

Carmeltazite

Carmichaelite

Hardness: 6

Carnallite

Hardness: 2.5

Carnotite

Hardness: 2

Carobbiite

Hardness: 2 - 2.5

Carpathite

Hardness: 1.5

Carpholite

Hardness: 5 - 5.5

Carraraite

Carrboydite

Caryinite

Hardness: 4

Caryochroite

Hardness: 2.5

Caryopilite

Hardness: 3 - 3.5

Cascandite

Hardness: 4.5 - 5.5

Caseyite

Hardness: 2 - 3

Cassagnaite

Cassedanneite

Hardness: 3.5

Cassidyite

Hardness: 3.5

Castellaroite

Hardness: 3.5

Caswellsilverite

Hardness: 2

Catalanoite

Hardness: 2

Catamarcaite

Hardness: 3.5

Catapleiite

Hardness: 5.5 - 6

Cattierite

Hardness: 4

Cattiite

Hardness: 2

Cavansite

Hardness: 3 - 4

Cavoite

Cayalsite-(y)

Hardness: 6.5

Caysichite-(y)

Hardness: 4.5

Cebaite-(ce)

Hardness: 4.5 - 5

Cebollite

Hardness: 5

Celadonite

Hardness: 2

Celleriite

Celsian

Hardness: 6 - 6.5

Centennialite

Cerchiaraite-(al)

Hardness: 4.5

Cerchiaraite-(fe)

Hardness: 4.5

Cerchiaraite-(mn)

Hardness: 4 - 5

Cerianite-(ce)

Cerite

Cerite-(ce)

Hardness: 5.5

Cerium

Cerromojonite

Ceruleite

Cervandonite

Cervandonite-(ce)

Hardness: 5

Cervantite

Hardness: 4 - 5

Cervelleite

Hardness: 2

Cesanite

Césarferreiraite

Cesàrolite

Hardness: 4.5

Cesbronite

Hardness: 3

Cesiodymite

Cesiokenopyrochlore

Cesplumtantite

Hardness: 7

Cetineite

Hardness: 3.5

Chabazite (series of zeolites)

Chabazite-ca

Hardness: 4 - 5

Chabazite-k

Hardness: 4

Chabazite-mg

Hardness: 4

Chabazite-na

Hardness: 4

Chabazite-sr

Hardness: 4 - 4.5

Chabournéite

Hardness: 3 - 3.5

Chadwickite

Hardness: 2

Chaidamuite

Hardness: 2.5 - 3

Chalcoalumite

Hardness: 2.5

Chalcocyanite

Hardness: 3.5

Chalcomenite

Hardness: 2 - 2.5

Chalconatronite

Chalcophanite

Hardness: 2.5

Chalcophyllite

Hardness: 2

Chalcosiderite

Hardness: 4.5

Chalcostibite

Hardness: 3 - 4

Chalcothallite

Hardness: 2 - 2.5

Challacolloite

Hardness: 2 - 3

Chambersite

Hardness: 7

Chaméanite

Hardness: 4.5

Chamosite

Hardness: 3

Chanabayaite

Hardness: 2

Changbaiite

Hardness: 5.5

Changchengite

Hardness: 3.5

Changoite

Hardness: 2 - 3

Chantalite

Chaoite

Hardness: 1 - 2

Chapmanite

Hardness: 2.5

Charleshatchettite

Charlesite

Hardness: 2.5

Charmarite

Charoite

Hardness: 5 - 6

Chatkalite

Hardness: 4.5

Chayesite

Hardness: 5 - 6

Chegemite

Hardness: 5.5 - 6

Chekhovichite

Hardness: 4

Chelkarite

Chenevixite

Hardness: 3.5 - 4.5

Chengdeite

Hardness: 5

Chenguodaite

Hardness: 2 - 3

Chenite

Hardness: 2.5

Chenmingite

Cheralite

Hardness: 5

Cheremnykhite

Hardness: 5.5

Cherepanovite

Hardness: 6

Chernikovite

Hardness: 2 - 2.5

Chernovite-(y)

Hardness: 4 - 5

Chernykhite

Hardness: 3 - 4

Chervetite

Hardness: 2 - 2.5

Chesnokovite

Chessexite

Chesterite

Hardness: 2 - 2.5

Chestermanite

Hardness: 6

Chevkinite-(ce)

Hardness: 5 - 5.5

Chiappinoite-(y)

Hardness: 6

Chiavennite

Hardness: 3

Chibaite

Hardness: 6.5 - 7

Childrenite

Hardness: 5

Chiluite

Hardness: 3

Chinchorroite

Hardness: 2.5

Chinleite-(y)

Hardness: 2.5 - 3

Chiolite

Hardness: 3.5 - 4

Chirvinskyite

Hardness: 5

Chistyakovaite

Hardness: 2.5

Chrysothallite

Chrysotile

Hardness: 2.5

Chubarovite

Hardness: 2

Chudobaite

Hardness: 2.5 - 3

Chukanovite

Hardness: 3.5 - 4

Chukhrovite-(ca)

Hardness: 3.5

Chukhrovite-(ce)

Hardness: 3

Chukhrovite-(nd)

Hardness: 3.5 - 4

Chukhrovite-(y)

Hardness: 3

Chukochenite

Chukotkaite

Churchite-(y)

Hardness: 3

Chursinite

Hardness: 3

Chvaleticeite

Hardness: 1.5

Chvilevaite

Hardness: 3

Cianciulliite

Hardness: 1 - 2

Cinnabar

Hardness: 2 - 2.5

Ciprianiite

Ciriottiite

Cirrolite

Hardness: 5 - 6

Clairite

Claraite

Claringbullite

Clarkeite

Hardness: 4 - 4.5

Claudetite

Hardness: 2.5

Clausthalite

Hardness: 2.5 - 3

Clearcreekite

Clerite

Hardness: 3.5 - 4

Cleusonite

Cliffordite

Hardness: 4

Clino-ferri-holmquistite

Hardness: 6

Clino-ferro-ferri-holmquistite

Hardness: 6

Clino-oscarkempffite

Hardness: 3 - 3.5

Clino-suenoite

Clinoatacamite

Hardness: 3

Clinobehoite

Hardness: 2 - 3

Clinobisvanite

Clinocervantite

Clinoclase

Hardness: 2.5 - 3

Clinoenstatite

Hardness: 5 - 6

Clinoferrosilite

Hardness: 5 - 6

Clinohedrite

Hardness: 5.5

Clinohumite

Hardness: 6

Clinojimthompsonite

Hardness: 2 - 2.5

Clinokurchatovite

Clinometaborite

Clinophosinaite

Hardness: 4

Clinoptilolite

Clinoptilolite-ca

Hardness: 3.5 - 4

Clinoptilolite-k

Hardness: 3.5 - 4

Clinoptilolite-na

Hardness: 3.5 - 4

Clinosafflorite

Hardness: 4.5 - 5

Clinotobermorite

Hardness: 4.5

Clinoungemachite

Clintonite

Hardness: 3.5 - 6

Cloncurryite

Hardness: 2

Coalingite

Hardness: 1 - 2

Cobaltarthurite

Hardness: 3.5 - 4

Cobaltaustinite

Hardness: 4.5

Cobaltkieserite

Hardness: 2 - 3

Cobaltkoritnigite

Hardness: 2 - 3

Cobaltlotharmeyerite

Hardness: 4.5

Cobaltneustädtelite

Hardness: 4.5

Cobaltoblödite

Hardness: 2.5

Cobaltomenite

Hardness: 2 - 2.5

Cobaltpentlandite

Hardness: 4 - 4.5

Cobalttsumcorite

Hardness: 4.5

Cobaltzippeite

Hardness: 2

Coccinite

Cochromite

Hardness: 7

Coconinoite

Coesite

Hardness: 7.5 - 8

Coffinite

Hardness: 5 - 6

Cohenite

Hardness: 5.5 - 6

Coiraite

Hardness: 2

Coldwellite

Colemanite

Hardness: 4.5

Colimaite

Colinowensite

Hardness: 4

Collinsite

Hardness: 3 - 3.5

Coloradoite

Hardness: 2.5

Colquiriite

Hardness: 4

Columbite (mineral group)

Hardness: 6

Columbite-(fe)

Hardness: 6

Columbite-(mg)

Hardness: 6.5

Columbite-(mn)

Hardness: 6

Colusite

Hardness: 3 - 4

Comancheite

Hardness: 2

Combeite

Comblainite

Hardness: 2

Compreignacite

Congolite

Hardness: 6.5 - 7.5

Connellite

Hardness: 3

Coombsite

Cooperite

Hardness: 4 - 5

Coparsite

Copiapite

Hardness: 2.5 - 3

Coquandite

Hardness: 3 - 4

Coralloite

Corderoite

Hardness: 3

Cordierite

Hardness: 7 - 7.5

Cordylite-(ce)

Hardness: 4.5

Cordylite-(la)

Hardness: 4

Corkite

Hardness: 3.5 - 4.5

Cornetite

Hardness: 4.5

Cornubite

Hardness: 4

Cornwallite

Hardness: 4.5

Coronadite

Hardness: 4.5 - 5

Correianevesite

Hardness: 3.5

Corrensite

Hardness: 1 - 2

Cortesognoite

Corundum

Hardness: 9

Corvusite

Hardness: 2.5 - 3

Cosalite

Hardness: 2.5 - 3

Coskrenite-(ce)

Cossaite

Costibite

Hardness: 6

Cotunnite

Hardness: 1.5 - 2

Coulsonite

Hardness: 4.5 - 5

Cousinite

Coutinhoite

Hardness: 2

Covellite

Hardness: 1.5 - 2

Cowlesite

Hardness: 5 - 5.5

Coyoteite

Hardness: 1.5

Crandallite

Hardness: 5

Cranswickite

Crawfordite

Hardness: 3

Creaseyite

Crednerite

Hardness: 4

Creedite

Hardness: 4

Crerarite

Hardness: 3 - 3.5

Crichtonite

Hardness: 5 - 6

Criddleite

Hardness: 3 - 3.5

Crimsonite

Hardness: 3.5

Cristobalite

Hardness: 6 - 7

Crocobelonite

Crocoite

Hardness: 2.5 - 3

Cronstedtite

Hardness: 3.5

Cronusite

Hardness: 1.5

Crookesite

Hardness: 2.5 - 3

Crossite

Hardness: 6-6.5

Crowningshieldite

Cryobostryxite

Hardness: 2

Cryolite

Hardness: 2.5

Cryolithionite

Hardness: 2.5 - 3

Cryptochalcite

Cryptohalite

Hardness: 2.5

Cryptomelane

Hardness: 5 - 6.5

Cryptophyllite

Cualstibite

Hardness: 2

Cuatrocapaite-(k)

Hardness: 2.5

Cuatrocapaite-(nh₄)

Cubanite

Hardness: 3.5

Cuboargyrite

Hardness: 3

Cumengeite

Hardness: 2.5

Cummingtonite

Hardness: 5 - 6

Cupalite

Hardness: 4 - 4.5

Cuprite

Hardness: 3.5 - 4

Cuproauride

Cuprobismutite

Cuprocopiapite

Hardness: 2.5 - 3

Cuproiridsite

Hardness: 5.5

Cuprokalininite

Hardness: 4.5 - 5

Cupromakopavonite

Cupromakovickyite

Hardness: 4 - 4.5

Cupromolybdite

Hardness: 3

Cuproneyite

Hardness: 3

Cupropavonite

Hardness: 2

Cupropearceite

Cupropolybasite

Hardness: 3 - 3.5

Cuprorhodsite

Hardness: 5 - 5.5

Cuprorivaite

Hardness: 5

Cuproroméite

Hardness: 3 - 4

Cuprosklodowskite

Hardness: 4

Cuprospinel

Hardness: 6.5

Cuprostibite

Hardness: 4

Cuprotungstite

Hardness: 4 - 5

Curetonite

Hardness: 3.5

Curienite

Hardness: 3

Curite

Hardness: 4 - 5

Currierite

Hardness: 2

Cuspidine

Hardness: 5 - 6

Cuyaite

Cuzticite

Hardness: 3

Cyanochroite

Hardness: 2 - 2.5

Cyanotrichite

Hardness: 1 - 3

Cylindrite

Hardness: 2.5

Cymrite

Hardness: 2 - 3

Cyprine

Hardness: 6.5

Cyrilovite

Hardness: 4

Czochralskiite

Hardness: 4 - 5