Mindat Logo

Schoonmaker Mine (Cramer Mine), Collins Hill, Portland, Middlesex Co., Connecticut, USA

Ref.: Rocks & Min.: 12:141-143. A mica and feldspar mine owned by A.O. Schoonmaker Co. of New York (Connecticut Mica & Mining Co.). Started 1933. Workings featured an 85 foot deep shaft.





Mineral List:
  • Albite
       var: Cleavelandite
  • Almandine
  • Aragonite
  • Beryl
    var: Aquamarine
  • Biotite
  • Cordierite
  • Elbaite
    var: Rubellite
       var: Verdelite
  • Fluorite
  • Lepidolite
  • Microcline
  • Muscovite
  • 'Pinite'
  • Pyrite
  • Quartz
    var: Rock Crystal
       var: Smoky Quartz
  • Schorl


    18 entries listed. 9 valid minerals.

    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!
    This page is currently not sponsored. Click here to find out how you can sponsor this page.


    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Jobs in Connecticut, USA 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.