Minerals
Minerals are naturally occurring inorganic substances with a specific chemical composition and crystalline structure. They are the building blocks of rocks and are classified by their chemical composition and crystal system.
102 specimens starting with "J" (of 5,084 total)
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Jáchymovite
Jacobsite
Hardness: 5.5 - 6.5
Jacquesdietrichite
Hardness: 2
Jacutingaite
Hardness: 3.5
Jadarite
Hardness: 4 - 5
Jaffeite
Jagoite
Hardness: 3
Jagowerite
Hardness: 4.5
Jahnsite-(cafemg)
Hardness: 4
Jahnsite-(camnfe)
Hardness: 4
Jahnsite-(camnmg)
Hardness: 4
Jahnsite-(camnmn)
Hardness: 4
Jahnsite-(camnzn)
Jahnsite-(mnmnfe)
Jahnsite-(mnmnmg)
Jahnsite-(mnmnmn)
Hardness: 4
Jahnsite-(mnmnzn)
Jahnsite-(nafemg)
Hardness: 4
Jahnsite-(namnmg)
Jahnsite-(namnmn)
Jaipurite
Jakobssonite
Jalpaite
Hardness: 2 - 2.5
Jamborite
Jamesite
Hardness: 3
Jamesonite
Hardness: 2.5
Janchevite
Hardness: 2.5
Janggunite
Hardness: 2 - 3
Janhaugite
Hardness: 5
Jankovićite
Hardness: 2
Jarandolite
Hardness: 5.5 - 6
Jarlite
Hardness: 4 - 4.5
Jarosewichite
Hardness: 4
Jaskólskiite
Hardness: 4
Jasmundite
Hardness: 5
Jasonsmithite
Jasrouxite
Jaszczakite
Javorieite
Jeanbandyite
Hardness: 3.5
Jeankempite
Hardness: 1.5
Jedwabite
Hardness: 7
Jeffbenite
Hardness: 7
Jeffreyite
Hardness: 5
Jennite
Hardness: 3.5
Jensenite
Hardness: 3 - 4
Jentschite
Hardness: 2 - 2.5
Jeppeite
Hardness: 5 - 6
Jeremejevite
Hardness: 7
Jerrygibbsite
Hardness: 5.5
Jervisite
Hardness: 6
Ježekite
Hardness: 2
Jianshuiite
Hardness: 1.5 - 2
Jimboite
Hardness: 5.5
Jimthompsonite
Hardness: 6 - 7
Jingsuiite
Jinshajiangite
Hardness: 4.5 - 5
Joanneumite
Hardness: 1
Joaquinite-(ce)
Hardness: 5 - 5.5
Joegoldsteinite
Joëlbruggerite
Hardness: 3
Joesmithite
Hardness: 5.5
Johachidolite
Hardness: 7.5
Johanngeorgenstadtite
Johannite
Hardness: 2 - 2.5
Johannsenite
Hardness: 6
Johillerite
Hardness: 3
Johnbaumite
Hardness: 4.5
Johninnesite
Hardness: 5 - 6
Johnkoivulaite
Hardness: 7.5
Johnsenite-(ce)
Hardness: 5 - 6
Johnsomervilleite
Hardness: 4.5
Johntomaite
Hardness: 4.5
Johnwalkite
Hardness: 4
Jôkokuite
Hardness: 2.5
Joliotite
Hardness: 1 - 2
Jolliffeite
Hardness: 6 - 6.5
Jonassonite
Hardness: 2.5 - 3
Jonesite
Hardness: 3 - 4
Joosteite
Hardness: 4
Jordanite
Hardness: 3
Jordisite
Hardness: 1 - 2
Jørgensenite
Hardness: 3.5 - 4
Jörgkellerite
Hardness: 3
Joséite-a
Joséite-b
Hardness: 2
Joteite
Hardness: 2 - 3
Jouravskite
Hardness: 2.5
Juabite
Hardness: 3 - 4
Juangodoyite
Juanitaite
Hardness: 1
Juanite
Juansilvaite
Hardness: 2.5
Julgoldite
Julgoldite-(mg)
Julienite
Jungite
Hardness: 1
Junitoite
Hardness: 4.5
Junoite
Hardness: 3.5 - 4
Juonniite
Hardness: 4 - 4.5
Jurbanite
Hardness: 2.5
Jusite
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