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Regional Report: Montgomery Co., Maryland, USA

For full locality listing click here. Alternatively: Click here for heirarchical list of localities in Montgomery Co., Maryland, USA

  • Actinolite - 21
  • Albite - 21, 32, 23
  • 'Albite-Anorthite Series' - 21
  • Almandine - 28
  • Ankerite - 20
  • Anthophyllite - 21
  • Antigorite - 21
  • Apatite-(CaF) - 21, 23
  • Aragonite - 21
  • Autunite - 23
  • Azurite - 21, 16
  • Bertrandite - 23
  • Beryl - 23
  • Biotite - 21
  • Bornite - 21
  • Brochantite - 21
  • Brucite - 21
  • Calcite - 21
  • 'Chalcedony' - 21
  • Chalcocite - 21
  • Chalcopyrite - 21, 25
  • 'Chlorite Group' - 20, 28, 12
  • 'Chromian Diopside' - 21
  • Chromite - 14, 21
  • Chrysocolla - 21
  • Chrysotile - 21
  • Clinochlore - 21
  • Clinozoisite - 21, 28
  • Coalingite - 21
  • Copper - 16
  • Cuprite - 16
  • Desautelsite - 21
  • 'Deweylite' - 21
  • Diopside - 21
  • Dolomite - 21
  • Dravite - 21
  • Epidote - 21, 28
  • Gahnite - 23, 7
  • Galena - 21, 25, 28
  • Goethite - 21
  • Gold - 15, 20, 25, 19, 27, 5, 13, 2, 31
  • Grossular - 21, 32
  • 'Heliodor' - 23
  • Hematite - 21
  • Huntite - 21
  • 'Hydrogrossular' - 21
  • Hydromagnesite - 21
  • Ilmenite - 21, 25
  • Limonite - 21, 15, 23, 25, 16, 28, 12
  • Lizardite - 21
  • Magnesiochromite - 14
  • Magnesite - 21, 12
  • Magnetite - 21, 15, 12
  • Malachite - 21, 25, 16
  • 'Manganese Dendrites' - 21
  • Mcguinnessite - 21
  • Microcline - 23
  • Microlite - 23
  • Millerite - 21
  • Molybdenite - 21
  • Muscovite - 23
  • Nimite - 21
  • 'Olivine' - 21
  • Omphacite - 21
  • Opal - 21
  • Orthoclase - 23
  • Palladium - 21
  • Pargasite - 21
  • Pentlandite - 21
  • Platinum - 21, 25
  • Pokrovskite - 21
  • Prehnite - 21
  • Pyrite - 21, 15, 25, 19, 28
  • Pyrochlore - 23
  • Pyrolusite - 26
  • Pyrrhotite - 21, 25
  • Quartz - 21, 20, 23, 25, 28, 2, 22, 24, 34
  • Rutile - 21
  • Schorl - 20, 23, 28
  • 'Serpentine Group' - 26
  • Siderite - 12
  • 'Specularite' - 16
  • Spessartine - 23, 7
  • Sphalerite - 25
  • Staurolite - 28
  • Talc - 21, 12
  • Tetradymite - 26
  • 'Thulite' - 21
  • Titanite - 21
  • Tochilinite - 21
  • 'Tourmaline' - 21
  • Tremolite - 21
  • Vesuvianite - 21
  • Xonotlite - 21
  • Zinnwaldite - 23
  • Zoisite - 21


    • 96 minerals listed.

    Locality Key
    1B Giancola Quarry, Montgomery Co., Maryland, USA
    2Bethesda Mine (Miller Mine), Montgomery Co., Maryland, USA
    3Bethesda, Montgomery Co., Maryland, USA
    4Black Hills Gold Mine, Boyds, Montgomery Co., Maryland, USA
    5Bogley Mine, Rockville, Montgomery Co., Maryland, USA
    6Brookville Mine, Montgomery Co., Maryland, USA
    7Burtonsville, Montgomery Co., Maryland, USA
    8Congressional Golf Course, Bethesda, Montgomery Co., Maryland, USA
    9Eagle Mine, Bethesda, Montgomery Co., Maryland, USA
    10Earth Products Company Mines, Montgomery Co., Maryland, USA
    11Earth Products Company Quarries, Montgomery Co., Maryland, USA
    12Ednor Steatite Locality, Ednor, Montgomery Co., Maryland, USA
    13Ellicott Gold Mine (Sandy Spring Mine; Brookeville Mine), Montgomery Co., Maryland, USA
    14Etchison mine & Lyde Griffith Property, Montgomery Co., Maryland, USA
    15Ford Mine, Bethesda, Montgomery Co., Maryland, USA
    16Gaithersburg, Montgomery Co., Maryland, USA
    17Gilmore Mine (B. H. Warner Mine), Montgomery Co., Maryland, USA
    18Griffith Mine, Montgomery Co., Maryland, USA
    19Harrison Mine (Potomac), Bethesda, Montgomery Co., Maryland, USA
    20Huddlestone Mine, Bethesda, Montgomery Co., Maryland, USA
    21Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA
    22Irma Mine, Montgomery Co., Maryland, USA
    23Kensington Mica Mine, Kensington, Montgomery Co., Maryland, USA
    24Lynch Mine, Montgomery Co., Maryland, USA
    25Maryland Mine (Allen Shaft), Cropley, Montgomery Co., Maryland, USA
    26Montgomery Co., Maryland, USA
    27Montgomery Mine, Barnesville, Montgomery Co., Maryland, USA
    28Northwest Branch Locality, Silver Spring, Montgomery Co., Maryland, USA
    29Paint Branch, Silver Spring, Montgomery Co., Maryland, USA
    30Riggs Quarry, Garrett Park, Montgomery Co., Maryland, USA
    31Rock Run Gold Placers, Bethesda, Montgomery Co., Maryland, USA
    32Rockville Crushed Stone Quarry, Rockville, Montgomery Co., Maryland, USA
    33Rockville, Montgomery Co., Maryland, USA
    34Sawyer Mine, Montgomery Co., Maryland, USA
    35Stoneyhurst Quarry Number 1, Montgomery Co., Maryland, USA
    36Stoneyhurst Quarry Number 3, Montgomery Co., Maryland, USA
    37Stonyhurst Quarries, Montgomery Co., Maryland, USA
    38Toms Run Quarry, Montgomery Co., Maryland, USA
    39Tri-State Stone Company Quarry (Bethesda Quarry; Tri-State Stone Company; Inc.), Montgomery Co., Maryland, USA
    40Unnamed Copper Mine, Montgomery Co., Maryland, USA
    41Unnamed prospect Near Brookville (MRDS - 10100512), Montgomery Co., Maryland, USA
    42Unnamed Schist Quarry Near Cabin John Park (MRDS - 10068002), Montgomery Co., Maryland, USA
    43Watson Mine, Montgomery Co., Maryland, USA

    The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 29th Nov 2009 08:07:11