SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Montgomery Co., Maryland, USAi
Regional Level Types
Montgomery Co.County
MarylandState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Locality type:
Largest Settlements:
PlacePopulation
Germantown86,395 (2011)
Silver Spring71,452 (2011)
Gaithersburg67,456 (2018)
Rockville66,980 (2017)
Bethesda60,858 (2018)
Aspen Hill48,759 (2018)
Other Languages:
French:
comté de Montgomery, Maryland, États-Unis
German:
Montgomery County, Maryland, Vereinigte Staaten
Italian:
contea di Montgomery, Maryland, Stati Uniti d'America
Russian:
Монтгомери, Мэриленд, Соединённые Штаты Америки
Simplified Chinese:
蒙哥马利县, 马里兰州, 美国
Spanish:
Condado de Montgomery, Maryland, Estados Unidos
Albanian:
Montgomery County, Maryland, Shtetet e Bashkuara të Amerikës
Arabic:
مقاطعة مونتغومري, ماريلند, الولايات المتحدة
Armenian:
Մոնտգոմերի շրջան, Մերիլենդ, Ամերիկայի Միացյալ Նահանգներ
Azeri:
Montqomeri, Merilend, Amerika Birləşmiş Ştatları
Basque:
Montgomery konderria , Maryland
Bavarian:
Montgomery County, Maryland, Vaoanigte Stootn
Belarusian:
Мантгомеры, Мэрыленд, Злучаныя Штаты Амерыкі
Bishnupriya Manipuri:
মন্টগোমেরী কাউন্টি, মেরিল্যান্ড, তিলপারাষ্ট্র
Bulgarian:
Монтгомъри, Мериленд, Съединени американски щати
Catalan:
Montgomery, Maryland, Estats Units d’Amèrica
Cebuano:
Montgomery County , Maryland
Cornish:
Konteth Montgomery, Tir Maria, Statys Unys
Danish:
Montgomery Amt, Maryland, USA
Dutch:
Montgomery County, Maryland, Verenigde Staten
Esperanto:
Kantono Montgomery, Marilando
Estonian:
Montgomery maakond, Maryland, Ameerika Ühendriigid
Farsi/Persian:
شهرستان مونتگومری، مریلند, مریلند, ایالات متحده آمریکا
Georgian:
მონტგომერის ოლქი, მერილენდი, ამერიკის შეერთებული შტატები
Hebrew:
מחוז מונטגומרי, מרילנד, ארצות הברית
Hungarian:
Montgomery megye, Maryland, Amerikai Egyesült Államok
Icelandic:
Montgomery County, Maryland, Bandaríkin
Indonesian:
Montgomery County, Maryland, Amerika Serikat
Japanese:
モンゴメリー郡, メリーランド州, アメリカ合衆国
Korean:
몽고메리 군, 메릴랜드주, 미국
Low Saxon/Low German:
Montgomery County, Maryland, USA
Min Dong Chinese:
Montgomery Gông, Maryland
Minnan / Hokkien-Taiwanese:
Montgomery Kūn
Norwegian:
Montgomery County, Maryland, USA
Polish:
Hrabstwo Montgomery, Maryland, Stany Zjednoczone
Portuguese:
Condado de Montgomery, Maryland, Estados Unidos
Romanian:
Comitatul Montgomery, Maryland, Statele Unite ale Americii
Sardinian:
contea de Montgomery, Maryland, Istados Unidos de Amèrica
Scottish Gaelic:
Montgomery County, Maryland, Na Stàitean Aonaichte
Serbian:
Округ Монтгомери, Мериленд, Сједињене Америчке Државе
Serbo-Croatian:
Montgomery County, Maryland, Sjedinjene Američke Države
Slovenian:
okrožje Montgomery, Maryland, Združene države Amerike
Swedish:
Montgomery County, Maryland, USA
Traditional Chinese:
蒙哥馬利縣, 馬利蘭州, 美國
Turkish:
Montgomery County, Maryland, Amerika Birleşik Devletleri
Ukrainian:
Монтґомері, Меріленд, Сполучені Штати Америки
Urdu:
مونٹگمری کاؤنٹی، میری لینڈ, میری لینڈ, ریاستہائے متحدہ امریکا
Vietnamese:
Quận Montgomery, Maryland, Chủng Quốc Hoa Kỳ
Waray:
Condado han Montgomery, Maryland, Estados Unidos
Welsh:
Montgomery County, Maryland, Unol Daleithiau America
Western Punjabi:
مونٹگومری کاؤنٹی، میری لینڈ, میری لینڈ, امریکہ


Montgomery County is primarily underlain by the complex igneous and metamorphic rocks of the Maryland Piedmont. These are beautifully exposed along the Potomac River at Great Falls, Chain Bridge, Bear Island as well as along other streams draining the county. Garnets and other metamorphic minerals are notable in the schists. A significant gold province was found in these rocks around Great Falls, which spurred several small gold rushes. Ultramafic rocks are also found in the County and host interesting mineral deposits, notably the Hunting Hill Quarry near Rockville, one of the few Maryland localities to merit an article in the Mineralogical Record. The urban to suburban nature of the county means that deposits are often obscured or obliterated by development. However the diverse nature of the bed rock make any exposure of potential collecting interest, even if exposed for only a brief period.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.