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Stream gravel quartz from Howard County Maryland
  
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Jim Wilkinson




Joined: 16 Jan 2021
Posts: 23
Location: Maryland


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PostPosted: Jan 24, 2021 21:30    Post subject: Stream gravel quartz from Howard County Maryland  

Quartz and associated minerals I have found in stream gravels in the Piedmont of central Maryland, mostly Howard County


Quartz out 2 (2).jpg
 Mineral: Quartz, rock crystal
 Dimensions: 12 x 4.5 cm
 Description:
 Viewed:  3294 Time(s)

Quartz out 2 (2).jpg



smok qtz 2 (2).jpg
 Mineral: Quartz (variety smoky quartz)
 Dimensions: 10 x 5.5 cm
 Description:
 Viewed:  3281 Time(s)

smok qtz 2 (2).jpg



brookite (2).jpg
 Mineral: quartz--smoky quartz?
 Dimensions: 6 x 4 cm
 Description:
odd striated look on crystalline quartz in sample
 Viewed:  3100 Time(s)

brookite (2).jpg



Brushrun2 - Crop (2).jpg
 Mineral: Quartz variety smoky quartz
 Dimensions: 3.5 x 2 cm
 Description:
from stream gravels in Columbia, Maryland
 Viewed:  2344 Time(s)

Brushrun2 - Crop (2).jpg



albite (2).jpg
 Mineral: quartz, feldspar, mica
 Dimensions: 7 x 5 cm
 Description:
found on roadcut near stream
 Viewed:  2311 Time(s)

albite (2).jpg



mar mica (2).jpg
 Mineral: Mica
 Locality:
Howard County, Maryland, USA
 Dimensions: 4.5 x 3.3 cm
 Description:
from gravel bar in stream
 Viewed:  1821 Time(s)

mar mica (2).jpg



amyt 1 (2).jpg
 Mineral: Quartz, variety amethyst
 Locality:
Howard County, Maryland, USA
 Dimensions: 1.5 x 1.0 cm
 Description:
from Patapsco River valley
 Viewed:  1816 Time(s)

amyt 1 (2).jpg



band marb (2).jpg
 Mineral: mica (biotite or phlogopite), marble
 Locality:
Howard County, Maryland, USA
 Dimensions: 3.75 x 3 cm
 Description:
 Viewed:  1773 Time(s)

band marb (2).jpg



mica white (2).jpg
 Mineral: mica, quartz, feldspar
 Locality:
Howard County, Maryland, USA
 Dimensions: 7 x 4.5 cm
 Description:
crystals appear- to be mica but metallic looking
 Viewed:  1759 Time(s)

mica white (2).jpg


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